Improvements in or relating to fluid delivery apparatuses

Abstract

A fluid delivery apparatus 1 comprising: a fluid transfer device 10 having one or more fluid inlets 12 for receiving one or more input fluids; a fluid outlet 14 configured to deliver an output fluid i

Description

Field of the invention This invention relates to a fluid delivery apparatus, and particularly, but not exclusively, a fluid delivery apparatus for treating one or more pathogens, and methods of using the same. The present invention also relates to a fluid delivery system, and a fluid delivery system for treating one or more pathogens, and methods of using the same. Background to the invention Pathogens, bacteria, mould, or the like can be infectious and contaminate surfaces and food. This can cause harm to a person when exposed to them. Apparatuses which deliver a fluid cleaning agent are used to kill or treat these to avoid spreading illness and to decontaminate items. Current fluid delivery apparatuses may be manually operated to deliver the fluid onto and around the contaminated area. This can be laboursome and time-consuming, as the user must operate the apparatus to deliver fluid onto every contaminated surface in the area. This can also waste a lot of the fluid, as this often applies excess fluid onto a surface. Because the fluid is a cleaning agent, it is often expensive, and its manufacture and waste can be harmful to the environment. Some fluid delivery apparatuses are automatic, however are ineffective at delivering sufficient fluid to every surface in the area. As such, existing automatic fluid delivery apparatuses fail to clean every surface in an area. Therefore, it would be desirable to provide an automatic fluid delivery apparatus which is effective at delivering fluid to every surface in an area, such that each surface is decontaminated. This is thought to be particularly desirable in hospitality or commercial settings, where areas must be cleaned regularly due to the large influx of people entering and leaving. The inventors have appreciated the shortcomings in known fluid delivery apparatuses. Summary of the invention According to a first aspect of the present invention there is provided a fluid delivery apparatus comprising: a fluid transfer device comprising: one or more fluid inlets for receiving one or more input fluids; a fluid outlet configured to deliver an output fluid from the fluid delivery apparatus; and a fluid flow path from the, or each fluid inlet to the fluid outlet; and a controller configured to control the operation of the fluid transfer device, wherein the fluid transfer device is configured to deliver the output fluid from the fluid outlet in at least one of: gaseous, vapour, or aerosol form, and wherein the controller is configured to run the fluid transfer device to output the fluid from the fluid delivery apparatus in response to a user input; and wherein the fluid transfer device comprises an electric field generator configured to apply an electric field over, or adjacent to, or around, or about, or across the fluid outlet, so that the output fluid is electrostatically charged. The fluid transfer device may deliver input fluid to the output, or fluid outlet. The fluid transfer device may convert the input fluid(s) to output fluid. The fluid transfer device may include one or more first fluid inlets for receiving a first input fluid. The fluid transfer device may include one or more second fluid inlets for receiving a second input fluid. The one or more input fluids may include at least one of: one or more liquids, one or more gases, one or more solids, and combinations thereof. The first input fluid may include at least one of: one or more liquids, one or more gases, one or more solids, and combinations thereof. The second input fluid may include at least one of: one or more liquids, one or more gases, one or more solids, and combinations thereof. In examples, the first input fluid is a liquid, and the second input fluid is a gas. Optionally, the second input fluid is air. The fluid delivery apparatus may be operable to deliver the output fluid to a room. The fluid delivery apparatus may be operable to deliver the output fluid to one or more surfaces. The fluid delivery apparatus may be operable to deliver the output fluid to a space, which may be a substantially enclosed space. The fluid delivery apparatus may be operable to deliver the output fluid to an area. The fluid delivery apparatus may be configured, in use, to provide the output fluid to one or more surfaces, spaces or areas spaced apart or remote from the fluid delivery apparatus. The one or more surfaces, spaces, or areas may be located outside of the fluid delivery apparatus. The fluid delivery apparatus may comprise a housing. The housing may be configured to house some or all of the components of the fluid delivery apparatus. The housing may be configured to provide support to the fluid delivery apparatus and the components therein or thereon. The housing may be configured to cover and protect at least one of: the fluid transfer apparatus, fluid transfer device, and the components therein. The housing may be substantially cuboid-shaped. The fluid delivery apparatus may comprise a height of approximately 0.5 metres, optionally approximately 0.6 metres, optionally approximately 0.7 metres, optionally approximately 0.8 metres, optionally approximately 0.8 metres, optionally approximately 1 metre. The fluid delivery apparatus may comprise a width of approximately 0.2 metres, optionally approximately 0.3 metres, optionally approximately 0.35 metres, optionally approximately 0.4 metres, optionally approximately 0.5 metres. The fluid delivery apparatus may comprise a depth of approximately 0.2 metres, optionally approximately 0.25 metres, optionally approximately 0.3 metres. The housing may comprise at least one side wall. The housing may include a top region. The housing may include a bottom region. The housing may comprise one or more vents. The fluid delivery apparatus may be a standalone unit, or be freestanding. The fluid delivery apparatus may be configured to remain upright and substantially stationary, in use and when the fluid transfer device is active. The fluid delivery apparatus may comprise one or more movement devices operable to move the fluid delivery apparatus. The one or more movement devices may be one or more wheels. The fluid delivery apparatus may be configured to be portable. The fluid delivery apparatus may be configured to be moveable substantially along a floor or ground or the like. The one or more movement devices may be located on the bottom region of the housing. The fluid delivery apparatus may be configured to be movable manually substantially by one person, optionally by hand. The fluid delivery apparatus may be a lightweight apparatus that can be moved by hand by a single person. The fluid delivery apparatus may be lightweight to enable it to be lifted and carried substantially a single person. The fluid delivery apparatus may have a weight of less than approximately 30 kg. The fluid delivery apparatus may have a weight of approximately 25 kg. The housing may comprise one or more gripping elements. The one or more gripping elements may be grippers, handles, or the like. The housing may comprise one or more first gripping elements. The one or more first gripping elements may be movable between a first position and a second position. The first position may be an extended position located distal from the fluid delivery apparatus. The second position may be a stowed position located proximal to the fluid delivery apparatus. The one or more first gripping elements may be a retractable handle(s), telescopic handle(s), or the like. The housing may comprise one or more second gripping elements. The one or more second gripping elements may be recessed. The one or more second gripping elements may be recesses, or cavities in at least one of the side walls, and / or top region, and / or bottom region of the housing. The, or each second gripping element may be located adjacent to a vent of the housing. The fluid delivery apparatus may comprise a single fluid transfer device, or two or more fluid transfer devices. The fluid transfer device may be located at least partially within the housing. The fluid transfer device may be located substantially entirely within the housing, and optionally one or more fluid inlets and / or one or more fluid outlets may be located at least partially outside of the housing. The fluid transfer device may comprise at least one input fluid reservoir. The fluid transfer device may comprise a single input fluid reservoir, or two or more input fluid reservoirs. The input fluid reservoir may be a fluid receptacle, or a fluid chamber, or a fluid tank, or the like. The input fluid reservoir may comprise a receptacle, or a chamber, or a tank, or the like. The input fluid reservoir may be for storing first input fluid. The input fluid reservoir may be configured to store, or retain the one or more input fluids, optionally first input fluid. The fluid transfer device may be made of a substantially chemically resistant material, or a substantially chemically resistant polymer. The input fluid reservoir may be made of a substantially chemically resistant material, or a substantially chemically resistant polymer. The housing may comprise an input fluid reservoir support located within the housing. The input fluid reservoir support may be configured to hold, or secure, or mount the input fluid reservoir. The input fluid reservoir may be located on the input fluid reservoir support thereof. The input fluid reservoir support may be a plate, or a mounting plate. The input fluid reservoir may be configured to receive one or more input fluids, or one or more first input fluids, and to provide the one or more input fluids, or one or more first input fluids to the fluid outlet of the fluid transfer device. The input fluid reservoir may comprise at least one input fluid reservoir inlet. The input fluid reservoir inlet may be operable to receive one or more input fluids, or the one or more first input fluids. The input fluid reservoir inlet may be connectable to the input fluid reservoir. The input fluid reservoir inlet may be in fluid communication with the input fluid reservoir. The input fluid reservoir inlet may be arranged to receive fluid provided by the user. The input fluid reservoir inlet may be a pipe member, an end of a pipe member, a flange portion of a pipe, a tube, an opening, an orifice, a hole, a conduit, or the like. The fluid inlet of the fluid transfer device may be located external to the housing. The fluid inlet of the fluid transfer device may be located on the housing, optionally the top region of the housing. The fluid inlet of the fluid transfer device may be configurable between an open position and a closed position. The fluid inlet of the fluid transfer device may comprise a closure member. The closure member may be a lid, cap, or the like. The input fluid reservoir inlet may be located on the housing, optionally the top region of the housing. The input fluid reservoir inlet may be configurable between an open position and a closed position. When the input fluid reservoir inlet is in the open position, the input fluid reservoir inlet may receive fluid. When the input fluid reservoir inlet is in the closed position, the input fluid reservoir inlet may not receive fluid. The input fluid reservoir inlet may comprise a closure member. The closure member may be a cap, lid, or the like. The input fluid, or the first input fluid, may be a pathogen treating fluid, and / or a mould killing fluid. The input fluid, or first input fluid may comprise a cleaning agent, and / or a fungicide, and / or a pesticide, and / or a contaminant treating agent, and / or an antiseptic fluid, and / or a bleaching agent, and / or a decontaminant, and / or a sterilising agent, and / or a sanitising agent, and / or a disinfectant, and / or a fumigation agent, and / or an antimicrobial agent, and / or an antiviral agent, and / or a bactericide, and / or a virucide, and / or a sporicide, and / or an amoebicide. The input fluid, or the first input fluid may comprise one or more solvents. The solvent may be water, or an aqueous solvent. The input fluid, or first input fluid may be an aqueous solution. The input fluid, or first input fluid may comprise water. The input fluid, or first input fluid, may comprise a hydrogen peroxide solution. The input fluid, or first input fluid, may comprise an ionic silver solution. The input fluid, or first input fluid may comprise a silver stabilised hydrogen peroxide solution. One or more of the fluid inlet(s) may be connectable to the input fluid reservoir. The fluid transfer device may be operable to transfer the input fluid to the fluid outlet from the input fluid reservoir. The input fluid reservoir may be arranged to receive input fluid from one or more of the fluid inlet(s) through gravity. The, or each fluid inlet may be a pipe member, an end of a pipe member, a flange portion of a pipe, a tube, an opening, an orifice, a hole, a conduit, or the like. The fluid flow path may include a path from at least one fluid inlet to the input fluid reservoir inlet. The fluid flow path may include a path connecting at least one fluid inlet to the input fluid reservoir inlet, to the input fluid reservoir, and to the fluid outlet. The fluid delivery apparatus may comprise one or more fluid conduits for transferring fluid along the fluid flow path. The fluid conduits may be pipes, tubes, or the like. The fluid transfer device may be configured to deliver or convert the input fluid from the input fluid reservoir, or one or more fluid inlets, to at least one of gaseous, vapour, or aerosol form. The fluid transfer device may comprise a single fluid outlet or two or more fluid outlets, each fluid outlet configured to deliver output fluid from at least one fluid inlet. The fluid outlet may be orientated to deliver fluid, or output fluid substantially upwards, or at least partially upwards, from the housing. The fluid outlet may be located on the outside of the housing. The fluid outlet may be located on the top region of the housing. The fluid outlet may be recessed into the housing, or the top region of the housing. The fluid outlet may be located in a recess, or in a cavity in the housing, or on the top region of the housing. The fluid outlet may be configured to protrude from the housing, or from the top region of the housing. The fluid outlet may include at least one of: orifice(s), hole(s), nozzle(s), atomiser(s), atomiser nozzle(s), or the like. The fluid outlet may be configured to spray the output fluid. The fluid outlet may be configured to deliver the output fluid from the fluid delivery apparatus in gaseous form, vapour form, or aerosol form, or any combination thereof. In examples, the output fluid is atomized. The fluid transfer device may comprise one or more input fluid pressurisers. The input fluid pressuriser may be configured to, in use, pressurise and provide input fluid, or second input fluid to one or more of the fluid inlet(s), or the second fluid inlet of the fluid transfer device. The input fluid pressuriser may pressurise the second input fluid. The input fluid pressuriser may be configured to, in use, pressurise and provide input fluid, or second input fluid to one or more of the fluid outlets(s) of the fluid transfer device. The fluid transfer device may comprise a single input fluid pressuriser, or two or more input fluid pressurisers. The input fluid pressuriser may be operable to increase the pressure of one or more input fluids, or the second input fluid. The input fluid pressuriser may be operable to compress one or more of the input fluids, or one or more of the second input fluids. The input fluid pressuriser may be operable to increase the pressure of one or more input fluids substantially above atmospheric pressure, optionally up to 4.5 bar or any suitable pressure. The input fluid pressuriser may be operable to pressurise the input fluid, or second input fluid. The input fluid pressuriser may be operable to pressurise the input fluid, or second input fluid to a constant pressure. The input fluid pressuriser may be operable to pressurise the fluid to up to approximately 4.5 bar. The input fluid pressuriser may comprise one or more compressors, or pumps, or the like. The input fluid pressuriser may be a gas compressor, or an air compressor, or the like. The input fluid pressuriser may comprise an input fluid pressuriser inlet. The input fluid pressuriser may be operable to transfer input fluid, or the second input fluid from outside the fluid delivery apparatus, or the atmosphere, to one or more of the fluid inlet(s) of the fluid transfer device, or the second fluid inlet, or the input fluid pressuriser inlet. The input fluid pressuriser inlet may be located on the housing. The input fluid pressuriser inlet may be located at or adjacent to at least one of the one or more vents. The input fluid being transferred from the input fluid pressuriser inlet may be substantially a gas. The gas may be air, atmospheric air, or any suitable source of gas. The input fluid pressuriser may comprise an input fluid pressuriser outlet. The input fluid pressuriser outlet may be arranged to transfer fluid from the input fluid pressuriser to one or more of the fluid outlet(s) of the fluid transfer device. The fluid being transferred by the input fluid pressuriser to the input fluid pressuriser outlet thereof may be compressed or pressurised, or compressed gas or pressurised gas, or compressed air or pressurised air. The input fluid pressuriser outlet may be arranged to transfer pressurised second input fluid from the input fluid pressuriser to one or more of the fluid outlet(s) of the fluid transfer device. The input fluid pressuriser may be configured and / or operable to transfer pressurised second input fluid from the input fluid pressuriser to the input fluid pressuriser outlet. The fluid delivery apparatus may be configured to reduce or eliminate the transfer of vibrations, or movement, of the input fluid pressuriser to the housing. The housing may comprise an input fluid pressuriser support located within the housing. The input fluid pressuriser support may be configured to hold, or secure, or mount the input fluid pressuriser. The input fluid pressuriser support may comprise, or may be one or more dampeners. The dampeners may be configured to dampen vibrations, or movement, of the input fluid pressuriser. The dampeners may be configured to reduce risk of damage to the input fluid pressuriser. The dampeners may be configured to attenuate or silence the noise of the input fluid pressuriser. The dampeners may be one or more resilient members. The dampeners may be one or more elastic members. The dampeners may be one or more springs. The input fluid pressuriser support may be arranged to space apart the input fluid pressuriser from the one or more side walls, and / or the bottom region, and / or the top region of the housing. The fluid delivery apparatus may comprise one or more coolers. The one or more coolers may be operable to cool the inside of the housing. The one or more coolers may be configured to reduce the temperature of the input fluid pressuriser. The one or more coolers may be configured to provide a coolant to the input fluid pressuriser. The coolant may be a fluid, optionally a gas, optionally air, optionally atmospheric air. The one or more coolers may comprise a fan, or blower, or the like. The one or more coolers may receive the coolant from the one or more vents. The one or more coolers may be configured to provide the coolant towards the input fluid pressuriser. The one or more coolers may be located at a mid-region of the housing, or between the bottom region and the top region of the housing. The one or more coolers may be arranged above the input fluid pressuriser. The housing may comprise one or more cooler supports located within the housing. The one or more cooler supports may be configured to hold, or secure, or mount the one or more coolers. The one or more coolers may be located on the one or more cooler supports. The, or each cooler support may be a plate, or a mounting plate. The fluid transfer device may comprise a first fluid flow path and a second fluid flow path. The first fluid flow path may be from one or more of the fluid inlet(s) to the fluid outlet. The second fluid flow path may be from one or more of the fluid inlet(s) to the fluid outlet. The first fluid flow path may provide first input fluid to the fluid outlet. The second fluid flow path may provide second input fluid to the fluid outlet. The second fluid flow path may provide compressed or pressurised second input fluid to the fluid outlet. The first fluid flow path may be between the input fluid reservoir inlet to the fluid outlet, and the second fluid flow path may be between the input fluid pressuriser inlet and the fluid outlet. The fluid transfer device, or the input fluid pressuriser may be operable to provide pressurised input fluid, or pressurised second input fluid to the fluid outlet. The fluid outlet may be configured to provide the first input fluid, and / or the pressurised second input fluid from the fluid delivery apparatus. The fluid transfer device may be operable to output the first input fluid, and / or the pressurised second input fluid from the fluid delivery apparatus. The output fluid may include the first input fluid. The output fluid may include the second pressurised fluid. The output fluid may include a combination of first input fluid and second pressurised input fluid. The fluid outlet may be configured to output the first input fluid and the pressurised second input fluid. The fluid outlet may be configured to simultaneously, or concurrently output the first input fluid and the pressurised second input fluid. The fluid transfer device may be operable to convert the first and second input fluids to aerosol or vapour form, or a combination thereof. The fluid outlet may comprise one or more first outlets. The fluid outlet may comprise one or more second outlets. The one or more first outlets may be configured to output the first input fluid. The one or more second outlets may be configured to output the pressurised second input fluid. The one or more first outlets and the one or more second outlets may be configured to output the first input fluid and the pressurised second input fluid simultaneously, or concurrently. The one or more first outlets and the one or more second outlets may be holes, or apertures, or the like. The fluid outlet may comprise a single first outlet, or a plurality of first outlets. The fluid outlet may comprise one, two, or three, or four, or five, or more second outlets. The opening, or openings of the fluid outlet may be fixed, or static. The diameter, or opening of the one or more first outlets may be fixed, or static. The diameter, or opening of the one or more second outlets may be fixed, or static. The one or more second outlets may be arranged around the one or more first outlets. The one or more first outlets may be surrounded by the one or more second outlets. The one or more first outlets and the one or more second outlets may be arranged to provide the output fluid in a gaseous form, or a vapour form, or an aerosol form, or any combination thereof. The fluid transfer device may be a nebuliser. The fluid transfer device may be a vaporiser. The fluid transfer device may be an aerosol generator. The fluid transfer device may comprise a nebuliser, a vaporiser, and / or an aerosol generator. The nebuliser may nebulise the input fluid, or the first input fluid. The vaporiser may vaporise the input fluid or the first input fluid. The aerosol generator may generate an aerosol using, at least in part, the input fluid or the first input fluid. The fluid transfer device may be operable to output dispersed particles. The fluid transfer device may be operable to output a dispersion. The fluid transfer device may be operable to disperse the fluid, or the output fluid. The fluid transfer device may be configured to convert the input fluid to at least one of: gaseous, vapour, or aerosol form, or a combination thereof. The fluid outlet may be configured to output the output fluid with a particle size up to approximately 3 pm, optionally up to approximately 4 pm, optionally up to approximately 5 pm, optionally up to approximately 6 pm, optionally up to approximately 7 pm, optionally up to approximately 10 pm, optionally up to approximately 15 pm, optionally up to approximately 20 pm, optionally up to approximately 30 pm, optionally up to approximately 40 pm, optionally between approximately 4.5 pm to 5.5 pm, optionally between approximately 3.5 pm to 6.5 pm, optionally between approximately 2.5 pm to 7.5 pm, optionally between approximately 3 pm to 5 pm, optionally between approximately 3 pm to 10 pm, optionally between approximately 3 pm to 15 pm, optionally between approximately 3 pm to 20 pm, optionally between approximately 3 pm to 30 pm, optionally between approximately 3 pm to 40 pm. The fluid transfer device may comprise an electric field generator. The electric field generator may be an electrically conductive member. The electric field generator may be operable to have a voltage of between approximately 300 V and 900 V, or between approximately 400 V and 800 V, or between approximately 500 V and 700 V. The electric filed generator may comprise a charging ring. The electric field generator may be a corona ring, or the like. The electric field generator may be mounted onto the housing of the fluid delivery apparatus. The electric field generator may be integrally formed with the fluid outlet. The fluid outlet may be an electrostatic fluid outlet, or an electrostatic fluid nozzle. The electric field generator may be configured to apply an electric field over, or adjacent to, or around, or about, or across the fluid outlet, so that the output fluid is electrostatically charged. The electric field generator may be configured to electrostatically charge, or ionise, the output fluid. The electric field generator may be configured to provide a net positive electrostatic charge to the output fluid. The electric field generator may be configured to provide a net negative electrostatic charge to the output fluid. Optionally, the electric field generator comprises an electrically conductive ring configured for attachment to, or assembly with, the fluid outlet assembly, or for attachment to the apparatus housing surrounding the fluid outlet where fluid outlet extends from said housing. Optionally, the electric field generator ring may be supported upon a sleeve. Optionally, the electric field generator ring may be held between a lower electrostatic sleeve and an upper electrostatic sleeve. Optionally, electric field generator ring comprises a suitable electrical connector, for example a leg, configured to extend through the lower sleeve and connect the ring to a power supply. Optionally, the electric field generator ring may be supported by a plurality of legs. Optionally, at least one leg may house or form an electrical connector configured to connect the ring to a power supply. Optionally, the electric field generator ring is formed from plate material such that the ring has a substantially flat profile. Optionally, the electric field generator ring is formed from steel, optionally stainless steel. Optionally, the electric field generator is activated upon operation of the input fluid pressuriser, or compressor. Advantageously, electrostatic charging of the output fluid enhances particle adhesion and distribution efficiency. Optionally, the field generator is configured to operate within a range of 2 million ions per cubic centimetres, thus enabling the use of hydrogen peroxide at a concentration of 7.9%. It has been found that such a configuration significantly reduces both the operational run time and the required dwell time for effective disinfection by the apparatus, thereby improving throughput and energy efficiency. Optionally, the fluid delivery apparatus comprises a collector arranged to collect electrostatically charged output fluid that has coalesced upon the electric field generator. Optionally, the collector the collector is in fluid communication with a fluid return means configured to return the collected output fluid to an input fluid reservoir of the fluid delivery apparatus. Optionally, the fluid return means comprises a fluid conduit extending between the collector and the input fluid reservoir. Advantageously, the fluid conduit extending between the collector and the input fluid reservoir provides a vent means for said input fluid reservoir. The fluid delivery apparatus may comprise a power supply. The power supply may be connectable to mains electricity through a power inlet located on the housing. The power supply may be a battery. The power supply may be located on the housing. The fluid transfer device may be connectable to the power supply. The input fluid pressuriser, and / or cooler(s) may be connectable to the power supply. The controller may be connectable to the power supply. The power supply may provide power to the electric field generator. The fluid delivery apparatus may comprise one or more temperature sensors. The temperature sensor(s) may be operable to measure the ambient temperature around or adjacent to the fluid delivery apparatus, or outside the fluid delivery apparatus. The temperature sensor(s) may be located on the housing. The fluid delivery apparatus may comprise one or more humidity sensors. The humidity sensor(s) may be operable to measure the humidity around or adjacent to the fluid delivery apparatus, or outside the fluid delivery apparatus. The humidity sensor(s) may be located on the housing. The humidity may be relative humidity, or any other desirable humidity measurement. The fluid delivery apparatus may comprise one or more organic matter sensors. The organic matter sensor(s) may be operable to measure the concentration of organic matter around or adjacent to the fluid delivery apparatus, or outside the fluid delivery apparatus. The organic matter sensor(s) may be located on the housing. The concentration of organic matter may be the concentration of volatile organic compounds, or concentration of total volatile organic compounds (TVOCs). The input fluid reservoir may comprise one or more fluid level sensors. The fluid level sensor(s) may be operable to measure the fluid level, or fluid volume in the input fluid reservoir. The fluid level sensor(s) may be located in, or on the input fluid reservoir. The controller may be connectable to, and / or operable to communicate with the temperature sensor(s). The controller may be connectable to, and / or operable to communicate with the humidity sensor(s). The controller may be connectable to, and / or operable to communicate with the organic matter sensor(s). The controller may be connectable to, and / or operable to communicate with the fluid level sensor(s). The controller may be connectable to, and / or operable to communicate with the input fluid reservoir. The controller may be connectable to, and / or operable to communicate with the electric field generator. The controller may be connectable to, and / or operable to communicate with the input fluid pressuriser. The controller may be connectable to, and / or operable to communicate with the cooler(s). The connections may be electrical connections, which may be wired and / or wireless electrical connections. The controller may be operable to control the operation of the fluid delivery apparatus. The controller may be operable to control the operation of the input fluid pressuriser. The controller may be operable to control the operation of the cooler(s). The controller may be operable to control the operation of the electric field generator. The controller may be operable to control the operation of and / or receive data from the temperature sensor(s). The controller may be operable to control the operation of and / or receive data from the humidity sensor(s). The controller may be operable to control the operation of and / or receive data from the organic matter sensor(s). The controller may be operable to control the operation of and / or receive data from the fluid level sensor(s). The controller may be operable to control the flow of fluid through the fluid outlet. The controller may be operable to control the flow of fluid from the input fluid pressuriser. The controller may be operable to control the flow of output fluid through the fluid outlet. The controller may be operable to control the flow of first input fluid through the fluid outlet. The controller may be operable to control the flow of pressurised second input fluid through the fluid outlet. The flow of pressurised second input fluid through the fluid outlet may draw the flow of first input fluid through the fluid outlet, or the first fluid outlet. The flow of pressurised second input fluid may induce the flow of first input fluid through the fluid outlet, or the second fluid outlet. The first input fluid may flow through the fluid outlet, or the first fluid outlet after and / or during the flow of pressurised second input fluid through the fluid outlet, or the second fluid outlet. The controller may be operable to control the flow of the input fluid, or the first input fluid from the input fluid reservoir. The controller may be operable to control the flow of the pressurised input fluid, or the pressurised second input fluid from the input fluid pressuriser. The controller may be operable to control the flow of coolant from the cooler(s). The controller may be configured to control, or operate the fluid transfer device to output the fluid from the fluid delivery apparatus in response to a user input. The controller may be configured to run the fluid transfer device for a period of time. The controller may be configured to output the output fluid from the fluid outlet for a period of time. The controller may be configured to output the output fluid continuously from the fluid outlet for a period of time. The fluid delivery apparatus may be operable to output the output fluid from the fluid outlet for a period of time. The fluid delivery apparatus may be operable to output the output fluid continuously from the fluid outlet for a period of time. The period of time for which the fluid transfer device is outputting fluid may be the run time. The period of time may be pre-determined, or calculated by the controller. The fluid delivery apparatus may be operable to carry out a run time of up to approximately 30 minutes, optionally up to approximately 35 minutes, optionally up to approximately 40 minutes, optionally up to approximately 45 minutes, optionally up to approximately 50 minutes, optionally up to approximately 55 minutes, optionally up to approximately 60 minutes, optionally at least 1 minute, optionally at least 5 minutes, optionally at least 15 minutes, optionally between 1 minute and 60 minutes, optionally between 5 minutes and 45 minutes. The controller may be an electronic controller, or a processor, or a microprocessor, or a computer, or the like. The controller may comprise a memory. The fluid delivery apparatus may comprise a user input device. The user input device may comprise a touchscreen, one or more buttons, or the like. The fluid delivery apparatus may comprise a user output device. The user output device may comprise a display, or a screen, or the like. The controller may be connectable to, and / or operable to communicate with the user input device. The controller may be connectable to, and / or operable to communicate with the user output device. The connections may be electrical connections, which may be wired and / or wireless electrical connections. The user input device and / or the user output device may be connectable to the power supply. The user input device may be configured to allow the user to provide input information to the controller. The user input device may be configured to allow the user to input operating parameter information to the fluid delivery apparatus. The input information may include operating parameter information. The input information may comprise user commands. The user commands may start the fluid delivery apparatus, and / or stop the fluid delivery apparatus. The user commands may adjust the run time. The user output device may be operable to provide output information about the fluid delivery apparatus to the user. The output information may comprise temperature data measured by the temperature sensor(s), and / or humidity data measured by the humidity sensor(s), and / or organic matter data measured by the organic matter sensor(s), and / or fluid level data measured by the fluid level sensor(s), and / or the run time, and / or the run time remaining. The controller may be configured to receive the input information and / or generate the output information. The controller may be configured to transmit the input information and / or the output information to the user output device. The controller may be configured to process the input information and / or the output information. The controller may be configured to clean the input information and / or the output information. The controller may be connectable to, or operable to communicate with external user device. The controller may be connectable to, or operable to communicate with one or more external user devices. The controller may be operable to receive information from, and / or transmit information to the external user device. The controller may be operable to process information from the external user device. The external user device may be separate to the fluid delivery apparatus. The external user device may comprise a user interface. The controller may be wirelessly connectable and / or connectable by wire to the external user device. The controller may be configured for wireless communication with the external user device. The wireless connection or communication may be at least one of: Bluetooth (RTM), NFC, a distributed computer network-based protocol, Wi-Fi (RTM), short-range radio, long-range radio, or the like. The external user device may be configurable, or configured to allow the user to provide the input information thereto and to transmit the input information to the controller. The external user device may be configurable or configured to receive the output information from the controller. The external user device may comprise a display. The external user device may be configurable, or configured to display the input information and / or the output information received from the controller. The external user device may include software for carrying out one or more of the functions of the device as set out herein. The external user device may be a computing device, a desktop PC, a handheld portable computing device such as a tablet, laptop, or smartphone, or the like. The external user device may be operable to control the controller. The external user device may be configurable, or configured to start and / or stop the fluid delivery apparatus. The external user device may be configurable, or configured to set and / or adjust the run time. The input information may include information about the surroundings, or environment around the fluid delivery apparatus. The input information may include one or more dimensions of the room, space, enclosed space, or area around the fluid delivery apparatus. The one or more dimensions may comprise one or more lengths, one or more widths, and / or one or more heights, and / or a floor / ground surface area, and / or a volume of the room or space, or any suitable dimension. The one or more dimensions may be approximate, for example within + / - 20% of the actual dimension, optionally + / -10%, optionally +1- 5%. The length may be the maximum length of the room / space, the width may be the maximum width, and the height may be the maximum height. It will be understood that in these examples, the input information includes information about the surroundings in which the apparatus is going to be used to deliver fluid. The controller may be configured to calculate the ground / floor area, or the volume, based on the one or more dimensions provided thereto. The controller may be configured to calculate the run time. The run time may be based, at least in part, on the one or more dimensions of the room, space, or area. The run time may be based, at least in part, on one or more dimensions of the room, space, or area in which the fluid delivery apparatus is to be used. The run time may be based, at least in part, on the floor / ground area or the volume of the room / space. The run time may be based, at least in part, on the temperature and / or humidity, which may be relative humidity. The run time may be calculated based, at least in part, on the temperature data from the temperature sensor(s), and / or the humidity data from the humidity sensor(s), and / or the organic matter data from the organic matter sensor(s), and / or the one or more dimensions of the room, space, or area in which the apparatus is to be used. The controller may be configured to stop the fluid transfer device, or the fluid outlet from outputting the output fluid based at least in part on information from the fluid level sensor. The controller may be configured to stop the fluid transfer device, or the fluid outlet from outputting the output fluid when the fluid level detected is too low. The user output device, and / or the external user device may be configured to display when the fluid transfer device, or fluid outlet has been stopped from outputting the output fluid when the fluid level detected is too low. The controller may be configured to stop the fluid transfer device, or the fluid outlet from outputting the output fluid based on information from the humidity sensor(s). The controller may be configured to stop the fluid transfer device, or the fluid outlet from outputting the output fluid when the humidity detected is too low. The controller may be configured to stop the fluid transfer device, or the fluid outlet from outputting the output fluid when the humidity detected is too high. The controller may be configured to stop the fluid transfer device, or the fluid outlet from outputting the output fluid when the humidity detected is less than approximately 70%, optionally less than approximately 65%, optionally less than approximately 60%, optionally less than 55%, optionally less than approximately 50%, optionally less than 40%, optionally less than 30%. The controller may be configured to stop the fluid transfer device, or fluid outlet from outputting the output fluid when the humidity detected is greater than approximately 80%, optionally greater than approximately 85%, optionally greater than approximately 90%, optionally greater than approximately 95%. The humidity may be relative humidity. The controller may be configured to stop the fluid transfer device, or the fluid outlet from outputting the output fluid in response to the input information received from the user input device and / or the external user device, and / or user commands to stop the fluid delivery apparatus. The fluid delivery apparatus, or controller may be configured to run at least one fluid output cycle to output the output fluid. The fluid delivery apparatus may be configured to proceed with the fluid output cycle in response to the input information, or the user command. The fluid output cycle may comprise one or more steps. The one or more steps, as outlined herein, may be carried out in any order unless the context provides otherwise. The fluid output cycle may include one or more steps of receiving fluid. The one or more steps of receiving fluid may comprise the step of providing input fluid, or the first input fluid to the fluid delivery apparatus, or the input fluid reservoir. The one or more steps of receiving fluid may comprise the step of providing input fluid, or the first input fluid to the fluid delivery apparatus, or the input fluid reservoir, through the fluid inlet or input fluid reservoir inlet. The one or more steps of receiving fluid may comprise the step of providing a source of fluid. The one or more steps of receiving fluid may comprise the step of providing fluid from the source of fluid to the input fluid reservoir. The fluid output cycle may include a step of inputting the input information to the user input device. The fluid output cycle may include a step of inputting the input information to the external user device. The fluid output cycle may include a step of transmitting input information from the user input device, and / or the external user device to the controller. The fluid output cycle may include one or more steps of measuring temperature using the temperature sensor(s). The fluid output cycle may include one or more steps of measuring humidity using the humidity sensor(s). The fluid output cycle may include one or more steps of measuring the concentration of organic matter using the organic matter sensor(s). The fluid output cycle may include one or more steps of measuring fluid level using the fluid level sensor(s). The fluid output cycle may include a step of calculating the run time. The fluid output cycle may include a step of moving the fluid delivery apparatus into position. The position may be a substantially central point of the room, or space, or area in which the fluid delivery apparatus is positioned. The fluid output cycle may include a step of elevating the fluid delivery apparatus above ground or floor level. The fluid output cycle may include a step of receiving a user input to start the fluid delivery apparatus. The input information, or user command may comprise the user input to start the fluid delivery apparatus. The controller may receive the user input the start the fluid delivery apparatus. The input information, or user command may be received by the user input device, and / or the external user device. The fluid output cycle may include one or more delay steps. The one or more delay steps may allow the user to move away from the fluid delivery apparatus before the fluid delivery apparatus starts running. The one or more delay steps may provide a period of time in which the fluid delivery apparatus prepares for running. The one or more delay steps may be up to approximately 10 seconds, optionally up to approximately 15 seconds, optionally up to approximately 20 seconds, optionally up to approximately 30 seconds, optionally up to approximately 1 minute. The one or more delay steps may include the step of indicating the delay time on the user output device and / or the external user device. The fluid output cycle may include one or more steps of pressurising input fluid. The one or more steps of pressurising the fluid may comprise the step of transferring input fluid, or second input fluid from the input fluid pressuriser inlet to the fluid pressuriser. The one or more steps of pressurising the fluid may include the step of operating the input fluid pressuriser to pressurise the input fluid, or the second input fluid. The one or more steps of pressurising input fluid may include the step of providing coolant from the cooler(s) to the input fluid pressuriser. The fluid output cycle may include one or more steps of providing the output fluid to the fluid outlet. The one or more steps of providing the output fluid to the fluid outlet may comprise the step of providing input fluid, or first input fluid to the fluid outlet. The one or more steps of providing the fluid to the fluid outlet may comprise the step of transferring pressurised fluid, or pressurised second input fluid from the fluid pressuriser to the fluid outlet. The step of providing input fluid or first input fluid, and pressurised fluid or pressurised second fluid, to the fluid outlet may occur substantially simultaneously, or concurrently. The one or more steps of providing the output fluid to the fluid outlet may comprise the step of mixing the first input fluid and the pressurised second input fluid. The fluid output cycle may include one or more steps of outputting the fluid from the fluid outlet. The one or more steps of outputting the fluid from the fluid outlet may include the step of outputting the first fluid from the fluid outlet, or first outlet. The one or more steps of outputting the fluid may include the step of outputting pressurised second fluid from the fluid outlet, or second outlet(s). The one or more steps of outputting the fluid may include the step of outputting fluid, or first fluid from the one or more first outlets. The one or more steps of outputting the fluid may include the step of outputting pressurised fluid, or pressurised second fluid from the one or more second outlets. The step of outputting fluid from the one or more first outlets and the step of outputting pressurised fluid from the one or more second outlets may occur substantially simultaneously, or concurrently. The one or more steps of outputting the fluid may include the steps of delivering the fluid in gaseous form, vapour form, or aerosol, or any combination thereof. The one or more steps of outputting the fluid may include the steps of nebulising, or vaporising, or atomising, or spraying, or dispersing the output fluid, or the like. The one or more steps of outputting the fluid may include the steps of generating an aerosol using, at least in part, the output fluid. The one or more steps of outputting the fluid may include the step of outputting the output fluid with a particle size up to approximately 3 pm, optionally up to approximately 4 pm, optionally up to approximately 5 pm, optionally up to approximately 6 pm, optionally up to approximately 7 pm, optionally up to approximately 10 pm, optionally up to approximately 15 pm, optionally up to approximately 20 pm, optionally up to approximately 30 pm, optionally up to approximately 40 pm, optionally between approximately 4.5 pm to 5.5 pm, optionally between approximately 3.5 pm to 6.5 pm, optionally between approximately 2.5 pm to 7.5 pm, optionally between approximately 3 pm to 5 pm, optionally between approximately 3 pm to 10 pm, optionally between approximately 3 pm to 15 pm, optionally between approximately 3 pm to 20 pm, optionally between approximately 3 pm to 30 pm, optionally between approximately 3 pm to 40 pm. The one or more steps of outputting the fluid may include the step of applying an electric field over, or adjacent to, or around, or about the fluid outlet, so that the outlet fluid is electrostatically charged. The one or more steps of outputting the fluid may include the step of setting and / or adjusting the run time. The step of setting and / or adjusting the run time may be in response to the input information being received by the controller. The one or more steps of outputting the fluid, and / or the run time may last up to approximately 30 minutes, optionally up to approximately 35 minutes, optionally up to approximately 40 minutes, optionally up to approximately 45 minutes, optionally up to approximately 50 minutes, optionally up to approximately 55 minutes, optionally up to approximately 60 minutes, optionally at least 1 minute, optionally at least 5 minutes, optionally at least 10 minutes, optionally at least 15 minutes, optionally between 1 minute and 60 minutes, optionally between 5 minutes and 45 minutes. The fluid output cycle may include one or more steps of displaying fluid output cycle information. The one or more steps of displaying fluid output cycle information may include the step of displaying temperature and / or humidity and / or fluid level and / or run time on the user output device and / or the external user device. The fluid output cycle may include a step of stopping the fluid output cycle. The step of stopping the fluid output cycle may stop the operation of the fluid transfer device, or the flow of fluid through the fluid outlet. The step of stopping the fluid output cycle may stop the operation of the input fluid pressuriser. The step of stopping the fluid output cycle may be in response to the run time expiring. The step of stopping the fluid output cycle may be in response to the input information received from the user input device and / or the external user device. The step of stopping the fluid output cycle may be configured to occur if the run time expires and / or in response to the input information, or user commands received from the user input device and / or the external user device. The step of stopping the fluid output cycle may be carried out automatically by the controller. The step of stopping the fluid output cycle may be carried out automatically by the controller when the run time expires. The step of stopping the fluid output cycle may be in response to the input fluid level being too low. The step of stopping the fluid output cycle may include the step of displaying that the fluid level is too low on the user output device and / or the external user device. The output information may include an indication that the fluid level is too low. The step of stopping the fluid output cycle may be in response to the humidity detected being too low. The step of stopping the fluid output cycle may be in response to the humidity detected being too high. The step of stopping the fluid output cycle may be in response to the humidity detected being less than approximately 70%, optionally less than approximately 65%, optionally less than approximately 60%, optionally less than 55%, optionally less than approximately 50%, optionally less than 40%, optionally less than 30%. The step of stopping the fluid output cycle may be in response to the humidity detected being greater than approximately 80%, optionally greater than approximately 85%, optionally greater than approximately 90%, optionally greater than approximately 95%. The step of stopping the fluid output cycle may include the step of displaying that the humidity is too low, or too high on the user output device and / or the external user device. The output information may include an indication that the humidity is too low, or too high. The step of stopping the fluid output cycle may include the step of turning off the fluid delivery apparatus. The step of stopping the fluid output cycle may include the step of setting the fluid delivery apparatus to a standby mode. The controller may be operable to indicate on the user output device and / or the external user device when the fluid output cycle has been completed. The controller may be configured to wait for a period of time, after the step of stopping the fluid output cycle, to indicate that the fluid output cycle has been completed. It will be understood that in example uses of the apparatus, this may indicate to a user that it is safe to enter the space / room in which the apparatus is located, or safe to approach the apparatus. According to a second aspect of the present invention there is provided a method of delivering fluid comprising the steps of: providing a fluid delivery apparatus comprising: a fluid transfer device comprising: one or more fluid inlets for receiving one or more input fluids; a fluid outlet configured to deliver an output fluid from the fluid delivery apparatus; and a fluid flow path from the, or each fluid inlet to the fluid outlet; an electric field generator configured to apply an electric field over, or adjacent to, or around, or about, or across the fluid outlet, so that the output fluid is electrostatically charged; and a controller configured to control the operation of the fluid transfer device, wherein the fluid transfer device is configured to deliver the output fluid from the fluid outlet in at least one of: gaseous, vapour, or aerosol form, and wherein the controller is configured to run the fluid transfer device to output the fluid from the fluid delivery apparatus in response to a user input, and operating the fluid delivery apparatus to output the fluid. According to a third aspect of the present invention there is provided a fluid delivery system comprising: a fluid delivery apparatus comprising: a fluid transfer device comprising: one or more fluid inlets for receiving one or more input fluids; a fluid outlet configured to deliver an output fluid from the fluid delivery apparatus; and a fluid flow path from the, or each fluid inlet to the fluid outlet; an electric field generator configured to apply an electric field over, or adjacent to, or around, or about, or across the fluid outlet, so that the output fluid is electrostatically charged; and a controller configured to control the operation of the fluid transfer device, wherein the fluid transfer device is configured to deliver the output fluid from the fluid outlet in at least one of: gaseous, vapour, or aerosol form, wherein the controller is configured to run the fluid transfer device to output the fluid from the fluid delivery apparatus in response to a user input; and an external user device configured to receive a user input, and operable to communicate the user input to the controller. The fluid delivery system may comprise a single external user device, or two or more external user devices. According to a fourth aspect of the present invention there is provided a method of delivering fluid comprising the steps of: providing a fluid delivery system comprising: a fluid delivery apparatus comprising: a fluid transfer device comprising: one or more fluid inlets for receiving one or more input fluids; a fluid outlet configured to deliver an output fluid from the fluid delivery apparatus; and a fluid flow path from the, or each fluid inlet to the fluid outlet; an electric field generator configured to apply an electric field over, or adjacent to, or around, or about, or across the fluid outlet, so that the output fluid is electrostatically charged; and a controller configured to control the operation of the fluid transfer device, wherein the fluid transfer device is configured to deliver the output fluid from the fluid outlet in at least one of: gaseous, vapour, or aerosol form, wherein the controller is configured to run the fluid transfer device to output the fluid from the fluid delivery apparatus in response to a user input; and an external user device configured to receive a user input, and operable to communicate the user input to the controller, and providing a user input to operate the fluid delivery system. According to a fifth aspect of the present invention there is provided a fluid delivery apparatus for treating one or more pathogens, the apparatus comprising: a fluid transfer device comprising: one or more fluid inlets for receiving one or more pathogen-treating input fluids; a fluid outlet configured to deliver a pathogen-treating output fluid from the fluid delivery apparatus; and a fluid flow path from the, or each fluid inlet to the fluid outlet; an electric field generator configured to apply an electric field over, or adjacent to, or around, or about, or across the fluid outlet, so that the output fluid is electrostatically charged; and a controller configured to control the operation of the fluid transfer device, wherein the fluid transfer device is configured to deliver the pathogen-treating output fluid from the fluid outlet in at least one of: gaseous, vapour, or aerosol form, and wherein the controller is configured to run the fluid transfer device to output the pathogen-treating output fluid from the fluid delivery apparatus in response to a user input. The fluid delivery apparatus may be configured to at least one of: treat, kill, clean, exterminate, and / or sterilise one or more pathogens, moulds, microbes, bacteria, viruses, contaminants, fungi, or the like. The fluid delivery apparatus may be a pathogen treating / killing apparatus, or a mould treating / killing apparatus, or a disinfecting apparatus, or a cleaning apparatus, or the like. The pathogen-treating input fluid and / or the pathogen-treating output fluid may be configured to at least one of: treat, kill, clean, exterminate, and / or sterilise one or more pathogens, moulds, spores, microbes, bacteria, viruses, contaminants, fungi, amoebas, or the like. The pathogen-treating input fluid and / or the pathogen-treating output fluid may be configured to be an antiseptic, or a disinfectant, or a fumigator, or the like. According to a sixth aspect of the present invention there is provided a method of treating one or more pathogens comprising the steps of: providing a fluid delivery apparatus for treating one or more pathogens, the apparatus comprising: a fluid transfer device comprising: one or more fluid inlets for receiving one or more pathogen-treating fluids; a fluid outlet configured to deliver a pathogen-treating output fluid from the apparatus; a fluid flow path from the, or each fluid inlet to the fluid outlet; an electric field generator configured to apply an electric field over, or adjacent to, or around, or about, or across the fluid outlet, so that the output fluid is electrostatically charged and a controller configured to control the operation of the fluid transfer device, wherein the fluid transfer device is configured to deliver the pathogen-treating output fluid from the fluid outlet in at least one of: gaseous, vapour, or aerosol form, wherein the controller is configured to run the fluid transfer device to output the pathogen-treating fluid from the fluid delivery apparatus in response to user input, and operating the fluid delivery device to output the pathogen-treating fluid. According to a seventh aspect of the present invention there is provided a fluid delivery system for treating one or more pathogens, the system comprising: a fluid delivery apparatus for treating one or more pathogens, the apparatus comprising: a fluid transfer device comprising: one or more fluid inlets for receiving one or more pathogen-treating input fluids; a fluid outlet configured to deliver a pathogen-treating output fluid from the apparatus; and a fluid flow path from the, or each fluid inlet to the fluid outlet; an electric field generator configured to apply an electric field over, or adjacent to, or around, or about, or across the fluid outlet, so that the output fluid is electrostatically charged; and a controller configured to control the operation of the fluid transfer device, and wherein the fluid transfer device is configured to deliver the pathogen-treating output fluid from the fluid outlet in at least one of: gaseous, vapour, or aerosol form, wherein the controller is configured to run the fluid transfer device to output the pathogen-treating fluid from the fluid delivery apparatus in response to the user input; and an external user device configured to receive a user input, and operable to communicate the user input to the controller. According to an eighth aspect of the present invention there is provided a method of treating one or more pathogens comprising the steps of: providing a fluid delivery system for treating one or more pathogens, the system comprising: a fluid delivery apparatus for treating one or more pathogens, the apparatus comprising: a fluid transfer device comprising: one or more fluid inlets for receiving one or more pathogen-treating input fluids; a fluid outlet configured to deliver a pathogen-treating output fluid from the apparatus; and a fluid flow path from the, or each fluid inlet to the fluid outlet; an electric field generator configured to apply an electric field over, or adjacent to, or around, or about, or across the fluid outlet, so that the output fluid is electrostatically charged; and a controller configured to control the operation of the fluid transfer device, wherein the fluid transfer device is configured to deliver the pathogen-treating output fluid from the fluid outlet in at least one of: gaseous, vapour, or aerosol form, wherein the controller is configured to run the fluid transfer device to output the pathogen-treating fluid from the fluid delivery apparatus in response to the user input; and an external user device configured to receive a user input, and operable to communicate the user input to the controller, and providing a user input to operate the fluid delivery system. According to an eleventh aspect of the invention there is provided an output nozzle for a fluid delivery apparatus, the outlet nozzle comprising an electric field generator configured to apply an electric field over, or adjacent to, or around, or about, or across the fluid outlet of the nozzle so that the output fluid is electrostatically charged. Optionally, the electric field generator comprises an electrically conductive ring configured for attachment to, or assembly with, the output nozzle, or for attachment to an apparatus to which the output nozzle is attached. Optionally, the electric field generator ring may be supported upon a sleeve adapted to substantially surround the output nozzle. Optionally, the electric field generator ring may be held between a lower electrostatic sleeve and an upper electrostatic sleeve. Optionally, electric field generator ring comprises a suitable electrical connector, for example a leg, configured to extend through the lower sleeve and connect the ring to a power supply. Optionally, the electric field generator ring may be supported by a plurality of legs. Optionally, at least one leg may house or form an electrical connector configured to connect the ring to a power supply. Optionally, the electric field generator ring is formed from plate material such that the ring has a substantially flat profile. Optionally, the electric field generator ring is formed from steel, optionally stainless steel. Optionally, the output nozzle comprises a collector arranged to collect electrostatically charged output fluid that has coalesced upon the electric field generator. Optionally, the collector the collector is adapted for fluid communication with a fluid return means configured to return the collected output fluid to a fluid reservoir. Optionally, the fluid return means comprises a fluid conduit extending between the collector and a fluid reservoir. Examples of the first to eleventh aspects of the present invention may include one or more features of one or more of the other aspects of the present invention or its examples. Brief description of the drawings Examples of the invention will now be described, by way of example, with reference to the drawings, in which: Fig. 1a shows a perspective view of a fluid delivery apparatus in accordance with an example of the invention; Fig. 1 b shows a front view of the fluid delivery apparatus of Fig. 1 a; Fig. 1 c shows a back view of the fluid delivery apparatus of Fig. 1 a; Fig. 2a shows a cross-sectional back view of the fluid delivery apparatus in accordance with another example of the invention; Fig. 2b shows a cross-sectional side view of the fluid delivery apparatus of Fig. 2a; Fig. 3 shows an exploded view of the fluid outlet of a fluid delivery apparatus in accordance with an example of the invention; Fig. 4a shows a front view of the fluid delivery apparatus of Fig. 2a, with the first gripping element shown in dashed lines; Fig. 4b shows a side view of the fluid delivery apparatus of Fig. 2a; Fig. 5 is a cross-sectional side view of a fluid delivery apparatus in accordance with the invention shown with a fluid collection and return means in accordance with the invention; Figures 6a, 6b and 6c are respective plan, side and end views of a fluid reservoir of a fluid delivery apparatus in accordance with the invention; Figs. 7a, 7b and 7c are detailed views of an exemplary nozzle assembly and electric field generator in accordance with the invention; Figs. 8a and 8b are detailed views of an exemplary nozzle arrangement with a fluid collection and return means and an exemplary electric field generator in accordance with the invention; Fig. 9 shows detailed views of a further exemplary nozzle arrangement; and Fig. 10 shows detailed views of an electric field generator ring in accordance with the invention. Detailed Description With reference to Figs. 1a to 10, aspects of a fluid delivery apparatus 1 according to the present invention is illustrated and described below. The fluid delivery apparatus 1 comprises a fluid transfer device 10 comprising one or more fluid inlets 12 for receiving one or more input fluids (not illustrated), a fluid outlet 14 configured to deliver an output fluid (not illustrated) from the fluid delivery apparatus 1, and a fluid flow path 15 from the, or each fluid inlet 12 to the fluid outlet 14. The fluid delivery apparatus 1 comprises a controller 20 configured to control the operation of the fluid transfer device 10. The fluid transfer device 10 is configured to deliver the output fluid from the fluid outlet 14 in aerosol form. The controller 20 is configured to run the fluid transfer device 10 to output the fluid from the fluid delivery apparatus 1 in response to a user input. In other examples, the fluid transfer device 10 could be configured to deliver the output fluid in gaseous, vapour or aerosol form, or any combination thereof, as required by the fluids to be used. The fluid transfer device 10 delivers input fluid to the fluid outlet 14, and converts input fluid to output fluid. The fluid transfer device 10 includes a first fluid inlet 12a for receiving a first input fluid (not illustrated), and a second fluid inlet 12b for receiving a second input fluid (not illustrated). In some examples, the fluid transfer device 10 may include more than one first fluid inlet 12a, and more than one second fluid inlet 12b. In the examples described herein, the first input fluid is a liquid, and the second input fluid is a gas. However, in some examples, the one or more first input fluids and second input fluids may include at least one of: one or more liquids, one or more gases, one or more solids, and combinations thereof. The fluid delivery apparatus 1 is operable to deliver the output fluid to a room, or one or more surfaces, or to a space which is a substantially enclosed space, or to an area. The surfaces, spaces, or area is located outside of the fluid delivery apparatus 1 in use. The fluid delivery apparatus 1 comprises a housing 2 configured to house, cover, and protect the components of the fluid delivery apparatus 1, and provide support to the fluid delivery apparatus 1 and components therein. The housing 2 is substantially cuboid-shaped, however in other examples, the housing 2 may be shaped differently. In the examples illustrated in Figs. 1a to 2b, 4a, 4b and 5, the fluid delivery apparatus 1 has a height of approximately 0.7 metres, a width of approximately 0.36 metres, and a depth of approximately 0.22 metres. In the examples illustrated in Figs. 1a to 2b, 4a, 4b and 5, the housing 2 comprises four side walls 2a, a top region 2b, and a bottom region 2c. The housing 2 comprises one or more vents 8 which are located in the side walls 2a. A vent 8 is shown in Fig. 4b. In this example, the vents 8 are within the second gripping element 2d” on the side walls 2a, however it should be understood that the vents 8 may be located anywhere on the fluid delivery apparatus 1. The fluid delivery apparatus 1 is a standalone, freestanding unit configured to remain upright and substantially stationary in use and when the fluid transfer device 10 is active. This is advantageous as in some examples the apparatus 1 will be turned on, and left in a room / space for a period of time, with the user then returning to collect it. It is therefore important that in some examples the apparatus 1 has some stability during use. The fluid delivery device 1 comprises movement devices 3 operable to move the fluid delivery apparatus 1, which are wheels. The movement devices 3 make the fluid delivery apparatus 1 portable, or moveable substantially along a floor or ground or the like, and are located on the bottom region 2c. The fluid delivery apparatus 1 is a lightweight apparatus configured to be movable manually, as well as lifted and carried, substantially by one person by hand. This means the average adult user, can easily move the fluid delivery apparatus 1 into the room, space, or area ready for use. In some examples, the fluid delivery apparatus 1 will be used to treat a large number of rooms or spaces, such as in a hotel, and it is advantageous if one person can move and operate the fluid delivery apparatus 1. In the examples illustrated in Figs. 1a to 2b, 4a, and 4b, the fluid delivery apparatus 1 has a weight of approximately 25 kg. The housing 2 comprises gripping elements 2d which, in the examples illustrated in Figs. 1a to 2b, 4a, and 4b, are a pair of grippers, and a pair of handles. In these examples, the housing 2 comprises a first gripping element 2d’, which is a retractable telescopic handle moveable between a first position and a second position. The first position is an extended position located distal from the fluid delivery apparatus 1 (as shown in Figs. 1a to 1c), and the second position is a stowed position located proximal to the fluid delivery apparatus 1 (as shown in Figs. 4a and 4b). As shown in Figs. 1a, 4a, and 4b the housing 2 also comprises two second gripping elements 2d” which are recesses, or cavities in the side walls 2a. As shown in Fig. 4b, the vents 8 are located within the recesses of the second gripping elements 2d”. In the examples illustrated in Figs. 1a to 2b, 4a, and 4b, the fluid delivery apparatus 1 comprises a single fluid transfer device 10, but in other examples, the fluid delivery apparatus 1 may comprise two or more fluid transfer devices 10. In the examples illustrated in Figs. 1a to 2b, 4a, 4b and 5, the fluid transfer device 10 is located partially within the housing 2, with the fluid outlet 14 located at least partially outside the housing 2. The fluid transfer device 10 comprises an input fluid reservoir 13, which is a fluid receptacle, fluid chamber, fluid tank, or the like for storing or retaining the first input fluid. The fluid transfer device 10 and input fluid reservoir 13 may be made of a substantially chemically resistant polymer. In the examples illustrated in Figs. 1a to 2b, 4a, 4b and 6, the fluid delivery apparatus 1 and input fluid reservoir 13 is made of copolymer polypropylene, however it should be understood that other substantially chemically resistant materials can be used. It should also be understood that components of the fluid delivery apparatus 1 and input fluid reservoir 13, such as the fluid inlets 12 and fluid outlets 14 may also be made of a substantially chemically resistant polymer. The housing 2 comprises an input fluid reservoir support 2e located within the housing 2 configured to hold, secure, or mount the input fluid reservoir 13. The input fluid reservoir 13 is located on the input fluid reservoir support 2e. As shown in Figs. 2a and 2b, the input fluid reservoir support 2e is a mounting plate. As shown in Figures 2a, 2b, 5 and 6a 6b, the input fluid reservoir 13 is configured to receive the first input fluid and provide it to the fluid outlet 14. In the illustrated examples, the input fluid reservoir 13 comprises an input fluid reservoir inlet 11 operable to receive the first input fluid provided by the user. The input fluid reservoir inlet 11 may be the flange portion of a pipe. As shown in the figures, the input fluid reservoir inlet 11 and the first fluid inlet 12a are located on the top region 2b of the housing 2, and are each configurable between an open position and a closed position. When in the open position, the input fluid reservoir inlet 11 and / or the first fluid inlet 12a can receive fluid, and when in the closed position, they cannot. In this example, the first fluid inlet 12a comprises a closure member 12a’ such as a cap, or a lid, or the like, for closing the inlet 11 and first fluid inlet 12a. A wide range of fluids can be used with the apparatus as required. The first input fluid could be a pathogen treating fluid, and / or a mould killing fluid. The first input fluid may comprise a cleaning agent, and / or a fungicide, and / or a pesticide, and / or a contaminant treating agent, and / or an antiseptic fluid, and / or a bleaching agent, and / or a decontaminant, and / or a sterilising agent, and / or a sanitising agent, and / or a disinfectant, and / or a fumigation agent, and / or an antimicrobial agent, and / or an antiviral agent, and / or a bactericide, and / or a virucide, and / or a sporicide, and / or an amoebicide. This means when the first input fluid is delivered by the fluid delivery apparatus 1, mould, pathogens, contaminants, fungi, pests, microbes, viruses, bacteria, spores, amoebas, and the like are killed, destroyed, or cleaned within the room, surfaces, space, or area, depending on the choice of fluid. Depending on the choice of fluid, the pathogen-treating input fluid and the pathogen-treating output fluid can be configured to at least one of: treat, kill, clean, exterminate, and / or sterilise one or more pathogens, moulds, spores, microbes, bacteria, viruses, contaminants, fungi, amoebas, or the like. Additionally, the pathogen-treating input fluid and the pathogen-treating output fluid is configured to be an antiseptic, or a disinfectant, or a fumigator, or the like. The fluids described herein are for illustrative purposes to describe how the apparatus 1 can be used, and other fluids will be readily apparent to the skilled person upon a reading of this specification. The fluid delivery apparatus 1 may be a pathogen treating / killing apparatus, or a mould treating / killing apparatus, or a disinfecting apparatus, ora cleaning apparatus, or the like. In the examples illustrated in Figs. 1a to 2b, 4a, and 4b, the first input fluid comprises one or more solvents. In some examples, the solvent may be water or an aqueous solution. In some examples, the first input fluid may be a silver stabilised hydrogen peroxide solution. The fluid inlet 12, specifically the first fluid inlet 12a is connectable to the input fluid reservoir 13. The fluid transfer device 10 is operable to transfer the input fluid to the fluid outlet 14 from the input fluid reservoir 13. In the examples illustrated in Figs. 1a to 2b, 4a, 4b and 5, the input fluid reservoir 13 is arranged to receive input fluid from the fluid inlet 12 through gravity. In the examples illustrated in Figs. 1a to 2b, 4a, 4b and 5, the fluid inlet 12, first fluid inlet 12a, are flange portions, and the second fluid inlet 12b is an opening. The fluid flow path 15 includes a path connecting the fluid inlet 12 to the input fluid reservoir inlet 11, the input fluid reservoir 13, the fluid reservoir outlet 13b and the fluid outlet 14. The fluid delivery apparatus 1 comprises fluid conduits 16 for transferring fluid along the fluid flow path 15 which are pipes and tubes, or the like. The fluid transfer device 10 is configured to deliver or convert the input fluid from the input fluid reservoir 13 and / or the fluid inlet 12, specifically the first fluid inlet 12a, to aerosol form. In the examples illustrated in Figs. 1a to 2b, 4a, and 4b, the fluid transfer device 10 comprises a single fluid outlet 14 configured to output fluid from the fluid inlet 12. In the examples illustrated in Figs. 1a to 2b, 4a, and 4b, the fluid outlet 14 is orientated to deliver output fluid partially upwards from the housing 2. In the examples illustrated in Figs. 1a to 2b, 4a, and 4b, the fluid outlet 14 is located on the top region 2b of the housing 2. The fluid outlet 14 protrudes from the top region 2b of the housing 2. In other examples, the fluid outlet 14 may be recessed in the housing, such that drips or spillages of output fluid from the fluid outlet 14 can be collected in the recess, which reduces waste excess output fluid, and prevents the excess output fluid from dripping, spilling, or seeping from the fluid delivery apparatus 1. In examples, outlet 14 is the outlet end of a nozzle assembly. In the examples illustrated in Figs. 1a to 2b, 4a, and 4b, the fluid outlet 14 includes five atomiser nozzles, configured to spray the output fluid to induce Brownian motion of the output particles. The fluid outlet 14 is configured to deliver the output fluid from the fluid delivery apparatus 1 in aerosol form. As shown in Figs. 2a and 2b, the fluid transfer device 10 comprises an input fluid pressuriser 17 which, in use, pressurises and provides the second input fluid to the fluid outlet 14. In the examples illustrated in Figs. 1a to 2b, 4a, and 4b, the fluid transfer device 10 comprises a single input fluid pressuriser 17. However, in other examples, the fluid transfer device 10 may comprise two or more input fluid pressurisers 17. The input fluid pressuriser 17 is operable to increase the pressure of the second input fluid substantially above atmospheric pressure to a constant pressure, optionally up to approximately 4.5 bar or any suitable pressure. In the examples illustrated in Figs. 1a to 2c, the input fluid pressuriser 17 is a gas compressor, and increases the pressure of the second input fluid to approximately 4.5 bar. The input fluid pressuriser 17 comprises an input fluid pressuriser inlet 17a. The input fluid pressuriser 17 is operable to transfer the second input fluid from outside the fluid delivery apparatus 1 or atmosphere, through the second fluid inlet 12b to the input fluid pressuriser inlet 17a. The input fluid pressuriser inlet 17a is located on the input fluid pressuriser 17. In the examples illustrated in Figs. 1a to 2b, 4a, and 4b, the input fluid being transferred from the fluid pressuriser inlet 17a to the input fluid pressuriser 17 is substantially a gas, specifically atmospheric air. The input fluid pressuriser 17 also comprises an input fluid pressuriser outlet 17b arranged to transfer the pressurised second input fluid from the input fluid pressuriser 17 to the fluid outlet 14. The input fluid pressuriser 17 is operable to pressurise the second input fluid to a constant pressure, such as up to approximately 4.5 bar. The fluid delivery apparatus 1 is configured to reduce or eliminate the transfer of vibrations, or movement of the input fluid pressuriser 17 to the housing 2. To do this, the housing 2 comprises an input fluid pressuriser support 2f configured to mount the input fluid pressuriser 17. In the examples illustrated in Figs. 1a to 2b, 4a, and 4b, and as shown in Figs. 2a and 2b, the input fluid pressuriser support 2f is a set of dampeners configured to dampen vibrations and movement of the input fluid pressuriser 17. These dampeners reduce the risk of damage to the input fluid pressuriser 17, and attenuate or silence the noise of the input fluid pressuriser 17. In these examples, the dampeners are resilient elastic members, such as compression springs. The input fluid pressuriser support 2f is arranged to space apart the input fluid pressuriser 17 from the side walls 2a, the bottom region 2c, and the top region 2b of the housing 2. The fluid delivery apparatus 1 comprises a cooler 4 operable to cool the inside of the housing 2 and configured to reduce the temperature of the input fluid pressuriser 17. In these examples, the cooler 4 receives atmospheric air from the one or more vents 8 and provides it as a coolant towards the input fluid pressuriser 17 using a fan, or blower, or the like. In these examples, the cooler 4 is located at a mid-region of the housing 2, and above the input fluid pressuriser 17. As shown in Figs. 2a and 2b, the housing 2 comprises a cooler support 2g located within the housing 2 configured to mount the cooler 4. In the examples illustrated in Figs. 1a to 2b, 4a, and 4b, the cooler support 2g is a mounting plate. The fluid transfer device 10 comprises a first fluid flow path in the form of conduit or pipe 15a from the first fluid inlet 12a to the fluid outlet 14, and a second fluid flow path in the form of conduit or pipe 15b from the second fluid inlet 12b to the fluid outlet 14. The first fluid conduit 15a provides first input fluid to the fluid outlet 14, and the second fluid conduit 15b provides pressurised second input fluid to the fluid outlet 14. The first fluid conduit 15a extends between the input fluid reservoir outlet 13b and the fluid outlet 14, and the second fluid conduit 15b extends between the input fluid pressuriser outlet 17b and the fluid outlet 14. As shown in Fig. 2b and Figures 6a to 6c, the input fluid reservoir 13 comprises a fluid level sensor 13a located in the input fluid reservoir 13 operable to measure the fluid volume in the input fluid reservoir 13. An exemplary fluid reservoir 13 is shown in greater detail in Figures 6a, 6b and 6c. As shown in Figures 6a, 6b and 6c input fluid reservoir may further comprise a return inlet 13c (shown also in Fig. 5) configured to receive a fluid return conduit 187 extending from a fluid collector 186 associated with an electric field generator 18 as described below. The input fluid pressuriser 17 is operable to provide pressurised second input fluid to the fluid outlet 14. The fluid outlet 14 is configured to provide both the first input fluid and the pressurised second input fluid from the fluid delivery apparatus 1. The fluid outlet 14 is configured to simultaneously output the first input fluid and the pressurised second input fluid. The output fluid includes a combination of the first input fluid and the second pressurised input fluid. The fluid transfer device 10 is operable to convert the first input fluid and the pressurised second input fluid to aerosol. In the example illustrated in Fig. 3, the fluid outlet 14 comprises a first outlet 14a configured to output the first input fluid, and four second outlets 14b configured to output the pressurised second input fluid from the input fluid pressuriser 17. In other examples, the fluid outlet 14 may comprise more than one first outlet 14a, and a different amount of second outlets 14b. The first outlet 14a and the second outlets 14b are configured to output the first input fluid and the pressurised second input fluid respectively simultaneously. The first outlet 14a and the second outlets 14b are holes. The diameters, or openings of the first outlet 14a and the second outlets 14b are fixed, or static. In the example illustrated in Fig. 3, the second outlets 14b are arranged around the first outlet 14a, with the first outlet 14a surrounded by the second outlets 14b. This arrangement of the first outlet 14a and the second outlets 14b provides the output fluid in aerosol form, but in other examples they can deliver gaseous, vapour, or aerosol form, or any combination thereof. In examples, outlet 14a is a liquid jet and outlets 14b is an air jet. Further detail of exemplary fluid outlet 14 assemblies is shown in Figures 3, 7a, 7b, 7c, 8a, 8b and 9 in which the assemblies comprise a body 14c, a retaining collar 14d, and a cap 14e. The retaining collar 14d is configured to secure the nozzle body 14c to the apparatus housing 2. As shown in Fig. 9, a fluid outlet 14 assembly may further comprise washers 14f, 14g as required. It will be understood that body 14c may be of any suitable shape, for example, but not limited to round (as shown by way of example only in Figs 7c and 8b), or hexagonal (as shown by way of example in Fig. 9). In the examples illustrated in Figs. 1a to 2b, 4a, 4b and 5, the fluid transfer device 10 is an aerosol generator. However, in other examples and depending on the type of fluids to be used, the fluid transfer device 10 may be a nebuliser, vaporiser, and / or aerosol generator. The aerosol generator generates an aerosol using the first input fluid. The fluid transfer device 10 is configured to disperse the output fluid, and to convert the input fluid to aerosol form. The fluid outlet 14 is configured to output the output fluid with a particle size of between approximately 3 pm to 40 pm. It will be appreciated that the apparatus 1 may be configured for any suitable particle size, depending on the pathogen(s) to be targeted. Without wishing to be bound by theory, and for example, some fungi, such as mould spores, are thought to be about 3 pm to 40 pm in size, and therefore matching the particle size of the output fluid to the mould spores means that the output fluid is more effective at treating or killing the same, as the output fluid can “follow” the mould spores through fabric or other materials. It will be readily understood by the skilled person that when treating other types of pathogen, a different output fluid particle size may be required, which can be accommodated simply by modifying the fluid outlet 14 of the examples shown here. When the fluid outlet 14 outputs the output fluid, the particles of the output fluid travel across the room, space, or area and land on every surface in the room, space, or area. The theory of Brownian motion means each particle takes a random path from the fluid delivery apparatus 1 to a surface. The number of random paths taken by the collection of particles is dependent on particle size, and the number of particles outputted. By optimising particle size and the number of particles outputted, more random paths can be taken, and greater coverage of the particles can be achieved. As a large amount of particles are outputted by the fluid outlet 14, a large number of paths are taken by the particles, and this provides a uniform coverage of output fluid on every surface in the room, space, or area outside the fluid delivery apparatus 1. This is optimised by the specific particle size of the output fluid, the position of the fluid delivery apparatus 1 in the room, space, or area, and the length of time for which the fluid delivery apparatus 1 operates. As shown generally in Figs. 2b, 4a, 4b and 5, the fluid transfer device 10 comprises an electric field generator 18. The electric field generator 18 is an electrically conductive member and in use, may have a voltage of between approximately 300 V and 900 V. In the examples shown in the Figs. 1a to 2b, 4a, and 4b, the electric field generator 18 may comprise a corona ring, and has a voltage of approximately 500 V in use. However, it should be appreciated that other electrically conductive members may be used as the electric field generator 18. As shown in Figs. 1a to 2b, 4a, 4b and 5, in examples, the electric field generator 18 may be mounted onto the housing 2 of the fluid delivery apparatus 1. However, it should be appreciated that in other examples, the electric field generator 18 may be integrally formed with the fluid outlet 14, such that the fluid outlet 14 is an electrostatic fluid nozzle. In other examples, as shown in Figures 7a, 7c, 8b and 10, the electric field generator 18 may comprise a ring 181 configured for attachment to, or assembly with, the fluid outlet 14 assembly, or for attachment to the apparatus housing 2 surrounding the fluid outlet where fluid outlet extends from said housing. Optionally, the electric field generator ring 181 is formed from plate material such that the ring has a substantially flat profile. Optionally, the electric field generator ring 181 is formed from steel, optionally stainless steel. In the exemplary arrangement shown in Figs. 7a and 7c, the ring 181 may be supported upon a lower electrostatic sleeve 182. Ring 181 may be held between the lower electrostatic sleeve 182 and an upper electrostatic sleeve 183. Ring 181 comprises a suitable electrical connector 181a, for example in the form of a leg, configured to extend through the lower sleeve 182 and connect the ring to a power supply 5. As shown by in the examples of Fig. 8b and 10, the electrostatic ring 181 may be supported by a plurality of legs 184. As shown by way of example in Figure 8b, at least one leg 1841 may house or form a suitable electrical connector 185 configured to connect the ring to a power supply 5. The electric field generator 18 is configured to apply an electric field over, or adjacent to, or around, or about, or across the fluid outlet 14, so that the outlet fluid is electrostatically charged, optionally with a net positive charge. This makes the output fluid electrostatically attracted to mould spores that are airborne or on surfaces, increasing the effectiveness of the mould killing. In other examples, the electric field generator 18 may be configured to provide a net negative electrostatic charge to the output fluid. Operation of the electric field generator 18 may be activated upon engagement of the compressor, i.e. input fluid pressuriser 17. Advantageously, electrostatic charging of the output fluid enhances particle adhesion and distribution efficiency. In examples, the electric field generator 18 is configured to operate within a range of 2 million ions per cubic centimetres, thus enabling the use of hydrogen peroxide at a concentration of 7.9%. It has been found that such a configuration significantly reduces both the operational run time and the required dwell time for effective disinfection by the apparatus, thereby improving throughput and energy efficiency. It has been observed that during operation, some atomised particles exiting fluid outlet 14 may adhere to electric field generator’s surfaces, coalescing into liquid droplets. Accordingly in examples there is provided a fluid collection and return means arranged to capture said droplets and convey them to fluid reservoir 13. This arrangement minimizes waste and maintains system cleanliness. As shown in Figures 5, 8a and 8b, the fluid collection and return means comprises a collector 186 and a fluid return conduit 187 extending from the base of said collector to return inlet 13c of the input fluid reservoir 13. Collector 186 comprises a cup-like member adapted to surround the fluid the fluid outlet 14 at a location proximate the apparatus housing. The base of the cup-like member comprises a drain 1861 to which the fluid return conduit 187 may connect. Advantageously, fluid return conduit 187 may serve a dual function: to act as a conduit for reclaimed output fluid, and to provide a vent for the fluid tank 13. Such a venting capability facilitates the upward draw of fluid from the tank 13 to the nozzle14 during operation. The airflow across the nozzle 14 induces a vacuum effect along the liquid line, which is enhances fluid delivery. Without this vacuum-assisted return and venting system, fluid movement from the tank 13 to the nozzle 14 would otherwise be impeded. It will be understood that the fluid collection and return means may be used with any of the exemplary fluid outlet 14 assemblies described herein and illustrated in the figures. The fluid delivery apparatus 1 comprises a power supply 5. In the examples illustrated in Figs. 1a to 2b, 4a, and 4b, the power supply 5 is connectable to mains electricity through a power inlet on the housing 2. The fluid transfer device 10, input fluid pressuriser 17, cooler 4, controller 20, and electric field generator 18 are connected to the power supply 5. As shown in Figs. 2b and 5b, the fluid delivery apparatus 1 comprises a temperature sensor 6, a humidity sensor 7, and an organic matter sensor 9 located on the housing 2 operable to measure the ambient temperature, humidity, and concentration of organic matter respectively around or adjacent to the fluid delivery apparatus 1. In this example, the humidity measured is relative humidity, but may be any other desirable humidity measurement. In this example, concentration of organic matter is the concentration of total volatile organic compounds (TVOCs), but may be any other desirable concentration of organic matter measurement. The controller 20 is operable to communicate with the temperature sensor 6, the humidity sensor 7, the organic matter sensor 9, the fluid level sensor 13a, the input fluid reservoir 13, the input fluid pressuriser 17, the electric field generator 18, and the cooler 4. In the examples illustrated in Figs. 1a to 2b, 4a, and 4b, the controller 20 is operable to communicate with these components through wired electrical connections. The controller 20 is operable to control the operation of the fluid delivery apparatus 1, including the input fluid pressuriser 17, the cooler 4, the electric field generator 18, the temperature sensor 6, the humidity sensor 7, the organic matter sensor 9, and the fluid level sensor 13a. The controller 20 is operable to receive data from the temperature sensor 6, the humidity sensor 7, the organic matter sensor 9, and the fluid level sensor 13a. The controller 20 is operable to control the flow of output fluid, first input fluid, and pressurised second input fluid through the fluid outlet 14. The flow of pressurised second input fluid through the fluid outlet 14 draws the flow of the first input fluid through the fluid outlet 14. The flow of pressurised second input fluid through the fluid outlet 14, specifically the second outlet 14b, draws the flow of first input fluid through the fluid outlet 14, specifically the first outlet 14a. The controller 20 is operable to control the flow of the first input fluid from the input fluid reservoir 13, and the flow of the pressurised second input fluid from the input fluid pressuriser 17, and the flow of coolant from the cooler 4. This makes the fluid delivery apparatus 1 automatic. The controller 20 is configured to operate, or control the fluid transfer device 10 to output the fluid from the fluid delivery apparatus 1 in response to a user input. The controller 20 is configured to run the fluid transfer device 10 for a period of time, that is, the fluid delivery apparatus 1 is operable to output the output fluid from the fluid outlet 14 for a period of time. The controller 20 is configured to output the output fluid from the fluid outlet 14 continuously for this period of time. The period of time is pre-determined and calculated by the controller 20. This period of time is also referred to as the run time throughout this specification. Determining the run time by the controller 20 means that the user does not need to do this, which makes the use of the apparatus 1 more efficient, as the user may bring the apparatus 1 to the room / space to be treated, turn on the apparatus 1, and run it for the determined run time. The fluid delivery apparatus 1 is operable to carry out a run time of between 1 minute and 60 minutes depending on the area to be treated, which will be described in more detail below. Other run times are possible. The controller 20 is an electronic controller, including a processor and a memory. For brevity, the features of the controller 20 are not described in detail. The fluid delivery apparatus 1 comprises a user input device 30 and a user output device 40. In the examples illustrated in Figs. 1a to 2b, 4a, and 4b, the user input device 30 comprises a touchscreen, and the user output device 40 comprises a display. Both the user input device 30 and the user output device 40 are connectable to the power supply 5. The controller 20 is operable to communicate with the user input device 30, and the user output device 40, through wired electrical connections. The user input device 30 is configured to allow the user to provide input information to the controller 20. The input information includes operating parameter information about the fluid delivery apparatus 1, and may include user commands to start and / or stop the fluid delivery apparatus 1, or to adjust the run time. The user output device 30 is operable to provide output information about the fluid delivery apparatus 1 to the user, which may comprise temperature data, humidity data, organic matter data, and fluid level data measured by the temperature sensor 6, humidity sensor 7, organic matter sensor 9, and / or fluid level sensor 13a respectively, as well as run time and / or run time remaining. The controller 20 is configured to receive the input information, and generate the output information. The controller 20 is also configured to transmit the output information to the user output device 40, and to process and clean the input information and the output information. The controller 20 is operable to communicate with a smart phone (an example of an external user device) (not illustrated), specifically to receive information from, and transmit information to the external user device, as well as process information from the external user device. The external user device is separate to the fluid delivery apparatus 1. Therefore, the user can operate the apparatus 1 directly, or via the external user device, as required. The controller 20 is also operable to communicate with more than one external user device. The external user device comprises a user interface (not illustrated). The controller 20 is wirelessly connectable to the external user device through at least one of: Bluetooth (RTM), NFC, a distributed computer network-based protocol, Wi-Fi (RTM), short-range radio, long-range radio, or the like. The external user device is configured to allow the user to provide the input information thereto, and to transmit the input information to the controller 20. The external user device is also configured to receive output information from the controller 20. The external user device may comprise a display (not illustrated), and may be configured to display the input information and output information received from the controller 20. The external user device comprises software for carrying out these functions. Although a smartphone is used here, the external user device may be a computing device, a desktop PC, a handheld portable computing device such as a tablet, or laptop, or the like, and in some examples it may be unnecessary for the apparatus 1 to communicate with an external user device. The external user device is operable to control the controller 20. The external user device is configured to start and stop the fluid delivery apparatus 1, and to set and adjust the run time. In the example described herein, the input information includes information about the surroundings, or environment around the fluid delivery apparatus 1, including the dimensions of the room, space, enclosed space, or area around the fluid delivery apparatus 1. These dimensions comprise the length, width, and height, of the space, which the controller 20 uses to calculate the surface area of the floor / ground, and the volume of the room or space. The input dimensions can be approximate, for example within + / - 20% of the actual dimension, optionally + / -10%, optionally + / - 5%. That is, even if the width, length and height is entered incorrectly, the apparatus 1 can still calculate a workable run time that will result in effective treatment. The length, width, and height are the maximum length, width, and height of the room / space. It will be understood that in this example, the input information includes information about the surroundings in which the apparatus is going to be used to deliver fluid. It will be understood that a user manual could guide the user on what dimensions of the room / space are to be used. The controller 20 is configured to calculate the run time based at least in part on the dimensions. In other examples, the run time may also be based on the temperature data, humidity data, and organic matter data from the temperature sensor 6, humidity sensor 7, and organic matter sensor 9 respectively. The controller 20 is configured to stop the fluid transfer device 10, specifically the fluid outlet 14 from outputting the output fluid based on information from the fluid level sensor 13a, specifically when the fluid level detected is too low. When this happens, the user output device 40 and / or the external user device is configured to display when the fluid transfer device 10, specifically the fluid outlet 14 has stopped outputting fluid. The controller 20 is also configured to stop the fluid transfer device 10, specifically the fluid outlet 14 from outputting the output fluid based on information from the humidity sensor 7, that is, specifically when the humidity detected is too low or too high. Specifically, the controller 20 is configured to stop the fluid transfer device 10, specifically the fluid outlet 14 from outputting fluid when the humidity detected is less than approximately 70%, optionally less than approximately 65%, optionally less than approximately 60%, optionally less than 55%, optionally less than approximately 50%, optionally less than 40%, optionally less than 30%, optionally greater than approximately 80%, optionally greater than approximately 85%, optionally greater than approximately 90%, optionally greater than approximately 95%. The value of humidity is typically predetermined based on an intended use of the apparatus 1. The controller 20 is also configured to stop the fluid transfer device 10, specifically the fluid outlet 14 from outputting the output fluid in response to the input information received from the user input device 30 and / or the external user device, specifically user commands to stop the fluid delivery apparatus 1. Example uses of the apparatus 1 will now be described. The fluid delivery apparatus 1, or controller 20 is configured to run at least one fluid output cycle to output the output fluid. The fluid delivery apparatus 1 is configured to proceed with the fluid output cycle in response to the input information, or the user command. The steps of the fluid output cycle ran by the fluid delivery apparatus 1 is described in detail below in relation to the examples illustrated in Figs. 1a to 2b, 4a, 4b and 5. The fluid output cycle includes one or more steps of receiving fluid, which further includes the step of providing fluid to the fluid delivery apparatus 1, specifically providing the first input fluid to the input fluid reservoir 13, and specifically through the fluid inlet 12 or input fluid reservoir inlet 11. The one or more steps of receiving fluid also includes the steps of providing a source of fluid, and providing fluid from the source of fluid to the input fluid reservoir 13. The fluid output cycle also includes a step of inputting the input information to the user input device 30 or the external user device, and a step of transmitting the input information from the user input device 30 or external user device to the controller 20. The fluid output cycle also includes a step of measuring temperature using the temperature sensor 6, and a step of measuring humidity using the humidity sensor 7, and a step of measuring the concentration of organic matter using the organic matter sensor 9, and a step of measuring fluid level using the fluid level sensor 13a. The fluid output cycle also includes a step of calculating the run time. The fluid output cycle also includes a step of moving the fluid delivery apparatus 1 into position. This position may be a substantially central point of the room or space in which the fluid delivery apparatus 1 is positioned. Depending on the room or space, the fluid output cycle may also include a step of elevating the fluid delivery apparatus 1 above ground or floor level. The fluid output cycle also includes a step of receiving a user input to start the fluid delivery apparatus 1. The input information, or user command comprises this user input to start the fluid delivery apparatus 1, and this may be received by the controller 20 by the user input device 30 or the external user device. The fluid output cycle also includes a delay step, which allows the user to move away from the fluid delivery apparatus 1 before the fluid delivery apparatus 1 starts running. This delay provides a period of time in which the fluid delivery apparatus 1 prepares for running, and may be up to approximately 10 seconds, optionally up to approximately 15 seconds, optionally up to approximately 20 seconds, optionally up to approximately 30 seconds, optionally up to approximately 1 minute, or any suitable time as required. The delay step includes the step of indicating the delay time on the user output device 30 and / or the external user device. The delay step includes the step of indicating the delay time on the user output device 40 and / or the external user device. The fluid output cycle also includes one or more steps of pressuring input fluid. The one or more steps of pressuring input fluid further comprises the steps of transferring the second input fluid from the input fluid pressuriser inlet 17a to the input fluid pressuriser 17, operating the input fluid pressuriser 17 to pressurise the second input fluid, and providing coolant from the cooler 4 to the input fluid pressuriser 17. The fluid output cycle also includes one or more steps of providing the output fluid to the fluid outlet 14. The one or more steps of providing the output fluid to the fluid outlet 14 further include the steps of providing first input fluid to the fluid outlet 14, and transferring pressurised second input fluid from the input fluid pressuriser 17 to the fluid outlet 14. These steps occur substantially simultaneously. The one or more steps of providing output fluid to the fluid outlet 14 also include the step mixing the first input fluid and the pressurised second input fluid. The fluid output cycle also includes one or more steps of outputting the fluid from the fluid outlet 14. The one or more steps of outputting fluid may further include the steps of outputting the first input fluid from the fluid outlet 14, specifically the first outlet 14a, and outputting the pressurised second input fluid from the fluid outlet 14, specifically the second outlets 14b. These two steps occur substantially simultaneously. The one or more steps of outputting the fluid may also include the step of delivering the output fluid in aerosol form, and spraying and dispersing the output fluid. The one or more steps of outputting the fluid also includes the step of outputting the output fluid with a particle size of between approximately 3 pm to 40 pm. The one or more steps of outputting the fluid also includes the step of applying an electric field over the fluid outlet 14, so that the outlet fluid is electrically charged. The one or more steps of outputting the fluid also includes the step of setting and / or adjusting the run time, in response to the input information being received by the controller 20. The one or more steps of outputting the fluid and the run time lasts between 1 minute and 60 minutes, which is calculated by the controller 20 based on the dimensions as described above. The fluid output cycle also includes one or more steps of displaying fluid output cycle information, which further includes the step of displaying temperature, humidity, fluid level, and run time on the user output device 40 and / or external user device. The fluid output cycle also includes a step of stopping the fluid output cycle. This step stops the operation of the fluid transfer device 30, specifically the flow of fluid through the fluid outlet 14, as well as stopping the operation of the input fluid pressuriser 17. The step of stopping the fluid output cycle is in response to the run time expiring, and / or in response to input information receiving from the user input device 30 and / or the external user device, specifically in response to input information or user commands received by the user input device 30 and / or the external user device. The step of stopping the fluid output cycle is carried out automatically by the controller 20. The step of stopping the fluid output cycle may also be in response to the input fluid level being too low, in which case this is displayed on the user output device 30 and / or the external user device. The step of stopping the fluid output cycle may also in response to the humidity detected being too low, or too high, specifically less than approximately 70%, optionally less than approximately 65%, optionally less than approximately 60%, optionally less than 55%, optionally less than approximately 50%, optionally less than 40%, optionally less than 30%. The step of stopping the fluid output cycle may be in response to the humidity detected being greater than approximately 80%, optionally greater than approximately 85%, optionally greater than approximately 90%, optionally greater than approximately 95%, in which case this is displayed on the user output device 30 and / or the external user device, along with an indication that the humidity is too low, or too high. The step of stopping the fluid output cycle also includes the step of turning off the fluid delivery apparatus 1, or setting the fluid delivery apparatus 1 to a standby mode. The controller 20 indicates on the user output device 40 and / or the external user device when the fluid output cycle has been completed. In the examples illustrated in Figs. 1a to 2b, 4a, and 4b, the controller is configured to wait for a period of time, after the step of stopping the fluid output cycle, to indicate that the fluid output cycle has been complete. This indicates to the user that it is safe to enter the space / room in which the apparatus 1 is located, and / or safe to approach the apparatus 1. In use, the fluid delivery apparatus 1 would commence the fluid output cycle steps above, and the user would provide their input when required. Modifications may be made to the foregoing examples within the scope of the present invention. For example, although the input fluid and output fluid have been termed as the pathogen-treating input fluid and the pathogen-treating output fluid respectively, it should be appreciated that these fluids may be termed as mould-treating, or bacteria-treating, or microbe-treating, or contaminant-treating, or virus-treating, orfungi-treating, or the like. TESTS FOR REDUCING COLONY FORMING UNITS (CFUs) IN A HOUSEHOLD The Applicant has performed a number of tests to determine the reduction in yeast and fungi mould colony forming units (CFUs) through use of the fluid delivery apparatus 1 according to the examples of the invention shown in Figs. 1a to 4b. The fluid delivery apparatus 1 was tested for use in different rooms of a household. Each room contained a viable microbial sample. Active air sampling and contact plates surface sampling were performed for the following rooms of the household: a kitchen, bedroom, and bathroom. Note that active air sampling was also performed to test the fluid delivery apparatus 1 for use in the living room of the household. The active air sampling was performed using a 90mm Sabouraud Dextrose Agar plate. Contact plate surface sampling was performed using 55mm Sabouraud Dextrose Agar. Each were cultured at 22° C ± 1 0 C for 5 days before the test. The dimensions of the rooms used in these tests are provided in Table 1 below: Table 1: Length(m) Width (m) Height (m) Total Volume (m3) Kitchen 3.90 2.10 2.40 19.66 Bedroom 3.76 3.24 2.40 29.24 Bathroom 2.70 1.40 2.40 9.07 Living room 4.80 3.42 2.40 39.40 For both active air and contact plate surface sampling, the total most probable number (MPN) of CFUs per m3 was counted before treatment. 5 The colony type of the yeast / fungi was also counted. The run time of the fluid delivery apparatus was determined by the volume of the room. In these tests, the fluid delivery apparatus 1 ran for approximately 0.2 min per 1 m3 of the room. io After running the fluid delivery apparatus 1 in a room for the predetermined time based on the volume of the room, active air sampling was repeated to count the MPN of CFUs per m3, and contact plate surface sampling was repeated to count the MPN of CFUs per m3 The colony 15 type of the yeast / fungi was also counted. The results for the active air samples are shown in Table 2: Table 2: Total MPN CFU per m3 before treatment Colony Type before treatment Total MPN CFU per m3 after treatment Colony Type after treatment Kitchen >100 >100 green / white fungi Not detected N / A Bedroom >100 >100 green / white fungi 4 1 white fungus 3 green / white fungi Bathroom >100 >100 green / white fungi 7 1 white fungus 6 green / white fungi Living Room >100 >100 green / white fungi 13 1 white fungus 12 green / white fungi Note that results considered too numerous to count were recorded as >100. The results of these tests for the contact plate surface samples are shown in Table 3: Table 3: Total MPN CFU per m3 before treatment Colony Type before treatment Total MPN CFU per m3 after treatment Colony Type after treatment Kitchen >100 >100 green / white fungi Not detected N / A Bedroom >100 >100 green / white fungi Not detected N / A Bathroom >100 >100 green / white fungi Not detected N / A Note that results considered too numerous to count were recorded as >100. From the test data shown in Tables 2 and 3, it is apparent that after io running the fluid delivery apparatus 1 embodying the present invention, the CFU count significantly drops, or is depleted completely.

Claims

1. A fluid delivery apparatus comprising:a fluid transfer device comprising:one or more fluid inlets for receiving one or more input fluids;anda fluid outlet configured to deliver an output fluid from the fluid delivery apparatus; anda fluid flow path from the, or each fluid inlet to the fluid outlet;a controller configured to control the operation of the fluid transfer device,wherein the fluid transfer device is configured to deliver the output fluid from the fluid outlet in at least one of: gaseous, vapour, or aerosol form,wherein the controller is configured to run the fluid transfer device to output the fluid from the fluid delivery apparatus in response to a user input; andwherein the fluid transfer device comprises an electric field generator configured to apply an electric field over, or adjacent to, or around, or about, or across the fluid outlet, so that the output fluid is electrostatically charged.

2. A fluid delivery apparatus as claimed in claim 1, wherein the electric field generator comprises an electrically conductive ring.

3. A fluid delivery apparatus as claimed in claim 2, wherein the electrically conductive ring is supported on a sleeve or a plurality of legs.

4. A fluid delivery apparatus as claimed in any preceding claim, wherein the fluid delivery apparatus comprises a collector arranged tocollect electrostatically charged output fluid that has adhered to the electric field generator, optionally wherein the collector is in fluid communication with a fluid return conduit arranged to return the collected liquid output fluid to an input fluid reservoir of the fluid delivery apparatus.

5. A fluid delivery apparatus as claimed in claim 4, wherein the fluid return conduit reservoir provides venting for the input fluid reservoir.

6. The fluid delivery apparatus of any preceding claim, wherein the fluid delivery apparatus is a standalone unit, or is freestanding, and wherein the fluid delivery apparatus is configured to remain upright and substantially stationary, in use and when the fluid transfer device is active.

7. The fluid delivery apparatus of any preceding claim, wherein the input fluid is a pathogen treating fluid, and / or a mould killing fluid.

8. The fluid delivery apparatus of any preceding claim, wherein the input fluid comprises a cleaning agent, and / or a fungicide, and / or a pesticide, and / or a contaminant treating agent, and / or an antiseptic fluid, and / or a bleaching agent, and / or a decontaminant, and / or a sterilising agent, and / or a sanitising agent, and / or a disinfectant, and / or a fumigation agent, and / or an antimicrobial agent, and / or an antiviral agent, and / or a bactericide, and / or a virucide, and / or a sporicide, and / or an amoebicide.

9. The fluid delivery apparatus of any preceding claim, wherein the fluid outlet includes at least one of: orifice(s), hole(s), nozzle(s), atomiser(s), atomiser nozzle(s), or the like.

10. The fluid delivery apparatus as claimed in any one of claims 4 to 9, wherein the fluid transfer device comprises at least one input fluid reservoir configured to store, or retain the one or more input fluids.

11. The fluid delivery apparatus of claim 10, wherein the fluid transfer device is operable to transfer the input fluid to the fluid outlet from the input fluid reservoir.

12. The fluid delivery apparatus of any preceding claim, wherein the fluid transfer device includes one or more first fluid inlets for receiving a first input fluid, andwherein the first fluid transfer device includes one or more second fluid inlets for receiving a second input fluid.

13. The fluid delivery apparatus of claim 12, wherein the fluid transfer device comprises one or more input fluid pressurisers operable to increase the pressure of the second input fluid.

14. The fluid delivery apparatus of claim 13, wherein the input fluidpressuriser comprises an input fluid pressuriser inlet and an input fluid pressuriser outlet, wherein the input fluid pressuriser is operable to transfer the second input fluid from outside the fluid delivery apparatus, or the atmosphere, to the input fluid pressuriser inlet, wherein the input fluid pressuriser is operable to pressurise the second input fluid, andwherein the input fluid pressuriser is configured to transfer pressurised second input fluid from the input fluid pressuriser to the input fluid pressuriser outlet.

15. The fluid delivery apparatus of claim 13 or claim 14, wherein the fluid delivery apparatus comprises a housing,wherein the housing comprises an input fluid pressuriser support located within the housing,wherein the input fluid pressuriser support comprises one or more dampeners configured to dampen vibrations, or movement, of the input fluid pressuriser, or to attenuate or silence the noise of the input fluid pressuriser.

16. The fluid delivery apparatus of any of claims 13 to 15, wherein thefluid transfer device comprises a first fluid flow path and a second fluid flow path,wherein the first fluid flow path provides first input fluid to the fluid outlet, and the second fluid flow path provides pressurised second input fluid to the fluid outlet.

17. The fluid delivery apparatus of any of claims 13 to 16, wherein the fluid outlet is configured to simultaneously, or concurrently output the first input fluid and the pressurised second input fluid.

18. The fluid delivery apparatus of any of claims 13 to 17, wherein the fluid outlet comprises one or more first outlets and one or more second outlets,wherein the one or more first outlets are configured to output the first input fluid, andwherein the one or more second outlets are configured to output the pressurised second input fluid.

19. The fluid delivery apparatus of any of claims 4 to 18, wherein the fluid delivery apparatus comprises one or more temperature sensorsoperable to measure the ambient temperature around or adjacent to the fluid delivery apparatus,wherein the fluid delivery apparatus comprises one or more humidity sensors operable to measure the humidity around or adjacent to the fluid delivery apparatus,wherein the fluid delivery apparatus comprises one or more organic matter sensors operable to measure the concentration of organic matter around or adjacent to the fluid delivery apparatus,wherein the input fluid reservoir comprises one or more fluid level sensors operable to measure the fluid level, or fluid volume in the input fluid reservoir,wherein the controller is connectable to, and / or operable to communicate with the one or more temperature sensors, and / or the one or more humidity sensors, and / or the one or more fluid level sensors, and wherein the controller is configured to stop the fluid transfer device, or the fluid outlet from outputting the output fluid when the fluid level detected is too low, and / or when the humidity detected is too low, and / or when the humidity detected is too high; and optionally wherein the controller is configured to calculate the run time,wherein the run time is based, at least in part, on one or more dimensions of the room, space, or area in which the fluid delivery apparatus is to be used.

20. The fluid delivery apparatus of any preceding claim, wherein the fluid delivery apparatus comprises a user input device and a user output device,wherein the controller is connectable to, and / or operable to communicate with the user input device and the user output device.

21. The fluid delivery apparatus of any preceding claim, wherein the controller is connectable to, or operable to communicate with an external user device,wherein the external user device is separate to the fluid delivery apparatus.

22. The fluid delivery apparatus of claim 21, wherein the external user device is configurable to allow the user to provide input information thereto and to transmit the input information to the controller,wherein the input information includes operating parameter information, and / or user commands which start and / or stop the fluid delivery apparatus.

23. An output nozzle for a fluid delivery apparatus, the outlet nozzle comprising an electric field generator configured to apply an electric field over, or adjacent to, or around, or about, or across the fluid outlet of the nozzle so that the output fluid is electrostatically charged.24 An output nozzle as claimed in claim 23, wherein the electric field generator comprises an electrically conductive ring;optionally wherein the electrically conductive ring is supported on a sleeve or a plurality of legs;optionally wherein the output nozzle comprises a collector arranged to collect electrostatically charged output fluid that has adhered to the electric field generator;optionally wherein the collector is in fluid communication with a fluid return conduit arranged to return the collected liquid output fluid to an input fluid reservoir of a fluid delivery apparatus.

25. A method of treating one or more pathogens comprising the steps of:providing a fluid delivery apparatus for treating one or more pathogens, the apparatus comprising:a fluid transfer device comprising:one or more fluid inlets for receiving one or more pathogen-treating fluids;a fluid outlet configured to deliver a pathogen-treating output fluid from the apparatus; anda fluid flow path from the, or each fluid inlet to the fluid outlet;an electric field generator configured to apply an electric field over, or adjacent to, or around, or about, or across the fluid outlet, so that the output fluid is electrostatically charged; anda controller configured to control the operation of the fluid transfer device,wherein the fluid transfer device is configured to deliver the pathogen-treating output fluid from the fluid outlet in at least one of: gaseous, vapour, or aerosol form,wherein the controller is configured to run the fluid transfer device to output the pathogen-treating fluid from the fluid delivery apparatus in response to user input, andoperating the fluid delivery device to output the pathogen-treating fluid.A

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