Kit to obtain a plenum for air distribution with quick configuration, plenum and assembly method of the kit to obtain the plenum

Abstract

A kit for obtaining a plenum (2) for distributing air comprising a main box-like collector structure (10) provided with a plurality of walls (11) defining an inner compartment (12) and comprising at least one first main opening (13) which can be operatively connected with the central air unit, at least one connection pipe or at least one second main opening which can be operatively and fluidly directly connected with the central air unit. The plurality of walls (11) includes at least one first secondary opening (14) which can be operatively and fluidly connected with the space of interest by means of at least one second connection pipe. The kit further includes at least one first connection element (30) having a first portion (31) which can be coupled with the second connection pipe and a second portion (32) configured to be directly removably couplable with the at least one first secondary opening (14). Furthermore, at least one layer (11') of the plurality of walls (11) of at least one section of the latter and the at least one first connection element (30) are at least partially made of polymeric material.

Description

Technical field of the invention

[0001] The present invention generally relates to the technical field of air distribution. In particular, the invention relates to a kit for obtaining a plenum for distributing air that is quick to configure, as well as the plenum and a method for assembling the kit for obtaining the plenum.Definitions

[0002] In the present document, the expression "air distribution" and its derivatives referring to a plenum is used to indicate the distribution thereof through the plenum both in delivery, that is from a central control unit towards one or more spaces of interest, and in extraction that is from the latter to the central control unit.State of the Art

[0003] In the air distribution industry, there are known plenums for indoor conditioning or CMV distribution or ventilation units, designed to distribute air between the central control unit and one or more spaces of interest.

[0004] Therefore, such plenums are designed for the delivery or introduction of air directly coming from the unit or coming from one or more main pipes towards the spaces or, alternatively, such plenums can be used for drawing the air coming from one or more spaces to direct it towards the central control unit.

[0005] Generally, such plenums have a main collector structure provided with one or more main openings connected with the central control unit, typically by means of flexible connection pipes, and multiple secondary openings connected with the individual spaces, typically by means of semi-rigid connection pipes.

[0006] Among these plenums available on the market, there are known metal plenums with fixed connectors or fittings which are however extremely cumbersome given that the secondary openings not used uselessly occupy space or metal plenums with removable fittings which however have an unstable connection with the main structure with resulting possible leakage of air.

[0007] On the other hand, there are known plenums made of polymeric material with connectors fixed to pre-configured plates which can be connected to the main structure at the secondary openings of interest by means of suitable screws.

[0008] However, in this latter case, the customisation of the plenum requires a lot of time due to the continuous succession of actions for de-coupling and re-coupling the plates on the collector structure, as well as the intervention of special technicians.Summary of the invention

[0009] An object of the present invention is to at least partly overcome the drawbacks illustrated above by providing a kit for obtaining an air distribution plenum that is quick to configure.

[0010] Another object of the present invention is to provide a kit for obtaining a plenum that is easy to configure.

[0011] Another object of the present invention is to provide a kit for obtaining a kit for obtaining a planum that is small in size.

[0012] Another object of the present invention is to provide a kit for obtaining a plenum that is highly resistant.

[0013] Another object of the present invention is to provide a kit for obtaining a plenum wherein the structure and the fittings are coupled stably.

[0014] Another object of the present invention is to provide a kit for obtaining a plenum minimising air leakage.

[0015] These and other objects which will be more apparent hereinafter, are attained by a kit and / or a plenum and / or a method for assembling it as described, illustrated and / or claimed herein. The dependent claims define advantageous embodiments of the invention. Document EP 2 840 325 A1 discloses the features of a kit for obtaining a plenum according to the preamble of claim 1.Brief description of the drawings

[0016] Further characteristics and advantages of the invention will be more apparent in light of the detailed description of a preferred but non-exclusive embodiment of the invention, illustrated by way of non-limiting example with reference to the attached drawings, wherein: FIG. 1 is an axonometric schematic view of a plenum 2 which can be used in an air conditioning or ventilation or CMV distribution units that can be channelled; FIG. 2 is an axonometric schematic view of a plenum 2 with integrated diffuser; FIGS. 3A and 3B are axonometric views of a cap 20; FIGS. 3C and 3D are bottom and lateral schematic views of a cap 20; FIG. 4 is an axonometric view of a fitting 30 which can be connected to an opening 14, regarding which FIG. 5A is a cross-sectional view along a longitudinal plane, while FIG. 5B is a lateral view of FIG. 5A; FIG. 6A is an axonometric view of a cap 20 which can be connected to an opening 14, regarding which FIG. 6B is a cross-sectional view along a longitudinal plane and FIG. 6C is a lateral view of fig. 6B; FIGS. 7A and 7B are axonometric views of a fitting 30 and a cap 20 which can be respectively connected to an opening 14 using different types of connection means 2030 and 1400, the latter shown in FIG. 8. Detailed description

[0017] With reference to the figures mentioned above, herein described is a kit 1 for obtaining a plenum 2 for distributing air.

[0018] Generally, the plenum 2 may be used as a delivery or extraction plenum for ventilated CMV units, for air conditioning units, for fan coils, for dehumidifiers or as distribution plenums for the CMV systems or even as plenums for air vents such as ports, grids, diffusers, ventilation valves and the like or as plenums in the centralised suctioning systems.

[0019] It is clear that in any case, the air may flow both in delivery, that is from a central air unit to the plenum 2, in particular to the individual distribution spaces, and in extraction or supply, that is from the individual spaces, to the plenum 2 and to the central air unit.

[0020] In a preferred but non-exclusive embodiment, the plenum 2 may be suitable to be installed for example on the floor, wall, ceiling or false ceiling of a home, a room or the like.

[0021] The kit 1 according to the invention is defined in claim 1 and includes a box-like collector structure 10 and at least one connection element 30.

[0022] The collector structure 10 is provided with a plurality of walls 11 which define the box-like shape thereof and delimit an inner compartment 12 to the structure 10.

[0023] The walls 11 include at least one main opening 13 which can be connected to the central air unit by means of a flexible connection pipe in a per se known manner or it may include a main opening, which is per se known and therefore not shown in the attached figures, which can be connected directly to the central air unit.

[0024] These connections may allow air to flow to or from the central air unit.

[0025] Furthermore, the walls 11 include a plurality of secondary openings 14 which can be connected to the space of interest by means of a respective semi-rigid connection pipe, for example corrugated.

[0026] As shown in fig. 1 and 2, each secondary opening 14 has a circular profile.

[0027] Advantageously, at least one layer 11' or a part, a section of the walls 11, as well as the one or more connection elements 30 are at least partially made of polymeric material.

[0028] In a preferred but non-exclusive embodiment, such layer 11' may be entirely made of polymeric material selected from PVC, PP, ABS.

[0029] Preferably, the walls 11 may have a layer 11' made of PVC, for example measuring 2 - 6 mm in thickness.

[0030] The choice of PVC will allow to obtain a generally healthy, strong structure 10 with minimised risk of mould and condensation in order to promote the health of the space where plenum 2 distributes the air.

[0031] This embodiment may be particularly relevant in the case of air distribution units of indoor air conditioning units.

[0032] In addition, PVC can help to obtain a structure 10 with high thermal stability, chemical and mechanical strength, self-extinguishing.

[0033] In any case, regardless of the material, the layer 11' may be surmounted by a layer of insulating material, designed to be exposed, for example measuring 1 - 5 mm in thickness.

[0034] The insulating material may also be a polymer, for example closed cell polyethylene foam or foamed PP or polyester fibre or the like, so as to ensure excellent thermal insulation and air leak resistance.

[0035] The insulating material may also be sound-absorbing, for example as in the case of foamed polyethylene, so as to ensure appropriate noise insulation.

[0036] On the other hand, the structure 10 may include a per se known gasket at the inlet 13 in order to ensure the airtight connection with the air pipe.

[0037] Preferably, the structure 10 may further include appropriate systems for providing silencers, which are per se known.

[0038] For example, there may be provided dissipation silencer plenums 2 capable of absorbing noise by using sound absorbing materials, such as glass wool or polyester fibres or sound insulation polyurethane foams.

[0039] In a first embodiment, particularly relevant in the case of plenum 2 for air vents, the walls 11 of the structure 10 may include, besides the description outlined above, an opening 1414 facing the space of interest and acting as a diffuser, without using a special port or grid, like in the embodiment of FIG. 2, or using the latter, in different embodiments not shown in the attached figures.

[0040] In a second embodiment, shown by way of example in fig. 1 and particularly relevant in the case of plenum 2 for an air distribution unit which that can be channelled of an air conditioning unit or a VMC distribution or ventilation unit, the walls 11 of structure 10 include, besides the description outlined above, a plurality of secondary openings 14 which can be connected to the individual spaces by means of the above-mentioned semi-rigid connection pipes.

[0041] In this case, the secondary openings 14 may be positioned at different walls 11.

[0042] The kit 1 includes at least one cap 20 at least partially made of polymeric material and which can be removably coupled with a said opening 14.

[0043] For example, the kit 1 may include a single closing cap 20 and a single connection element 30, for example in the case of a structure 10 provided with only two openings 14.

[0044] Preferably, the kit 1 may include a plurality of caps 20 and a plurality of connection elements 30.

[0045] For example, the structure 10 may have more than two openings 14, therefore three, four, and so on, and the kit 1 may include a plurality of closing caps 20 and a plurality of connection elements 30.

[0046] However, from a functional point of view, each opening 14 designed for connection with a fluidic connection pipe, typically semi-rigid, may be coupled with a connection element 30, while each opening 14 not designed for connection with a fluidic connection pipe, can be coupled with a closing cap 20, so that the plenum 2 can be easily configured according to requirements.

[0047] Therefore, it is clear that the coupling between each secondary opening 14 and a respective cap 20 or a respective connection element 30 may therefore be of the removable type.

[0048] This means that each individual secondary opening 14 can be alternatively and selectively coupled with a cap 20 or a connection element 30 and vice versa.

[0049] In a preferred but non-exclusive embodiment, the kit 1 may be in a pre-assembled form where the structure 10 may include some secondary openings 14 already coupled with a respective cap 20 and some secondary openings 14 already coupled with a respective connection element 30.

[0050] Therefore, depending on the desired configuration, the caps 20 and the connection elements 30 may be de-coupled from the respective secondary openings 14 and positioned, after re-coupling, at the secondary openings 14 of interest.

[0051] In order to make the couplings of the removable type, in any embodiment, each connection element 30 and, where present, each cap 20 may have the following characteristics.

[0052] Advantageously, each connection element 30 includes a portion 31 which can be coupled with a respective fluidic connection pipe and a portion 32 for the connection with a respective opening 14.

[0053] As shown in fig. 4, each connection element 30 is circular-shaped.

[0054] In a first exemplary embodiment of the connection element 30, shown in fig. 7A, which is not according to, but helpful for understanding the invention, the connection element may include connection means 2030, while the opening(s) 14 may include connection portion 140 with connection devices 1400.

[0055] In this case, the connection means 2030 and 1400 may be of the quick-coupling or bayonet-coupling type, per se known, as shown in fig. 7A and 8.

[0056] In a second embodiment of the connection element 30, shown in figs. 4and 5A, 5B, which is also not according to, but helpful for understanding the invention, the opening(s) 14 may at least partially include a thread 15, while the portion 32 of the connection element 30 may at least partially include a counter-threaded surface 35.

[0057] According to the invention however, the surface 15 extends along the entire edge perimeter of edge 14' of each secondary opening 14, while counter-threading 35 extends along the entire perimeter 33 of the portion 32.

[0058] Considering that the openings 14 and connection elements 30 are circular in plan view, the counter-threading 35 defines a substantially circular path.

[0059] It is clear that the full threading will allow to maximize the stability of the coupling between the connection element 30 and a respective opening 14, as well as to minimise air leakage.

[0060] As a matter of fact, the contact between the surface of the threading 15 and of the counter-threading 35 may ensure a physical blocking to the flow of air through the opening 14 due to the presence of threads along the coupling surfaces.

[0061] Advantageously, the portion 32 may include a perimeter wall 32' parallel to the outer surface 30' of the connection element 30 and it may extend along the entire perimeter 33 of the portion 32, at a predetermined distance d' with respect to the perimeter edge 310 of the outer surface 30'.

[0062] For example, the perimeter wall 32' may be axially recessed with respect to the surface 30' so that it is completely contained by the lateral overall dimensions defined by the latter.

[0063] In other words, the connection element 30 may include an annular edge portion 36 interposed between the perimeter wall 32' and the perimeter edge 310 of the outer surface 30' of the connection element 30, where the annular edge portion 36 is perpendicular to such outer surface 30'.

[0064] Therefore, when the connection element 30 will be connected with the respective opening 14, therefore when the threading 35 will be coupled with counter-threading 15, the flat edge portion 36 may at least partially abut against a portion 16 surrounding the edge perimeter 14' of the opening 14 on the exposed surface of wall 11, be it the layer 11' or the insulating layer.

[0065] In this manner, the contact between surfaces 16 and 36 will allow to prevent further leakage of air from the structure 10 just like it will allow to prevent accidental de-coupling between fitting 30 and the opening 14, making the connection between them extremely stable and secure.

[0066] Preferably, each cap 20 may include a planar surface 21 and an opposite planar surface 22.

[0067] The planar surface 21 may be faced into use towards the compartment 12, that is when the cap 20 will be coupled with a respective secondary opening 14, the surface 21 may be faced towards the compartment 12.

[0068] Preferably, the surface 22 may include gripping devices 23 so as to allow a user to grasp the cap 20 so as to connect it with the respective secondary opening 14 or remove it therefrom.

[0069] For example, the gripping means 23 may be in the form of a fin 230 protruding from the surface 22 and which can be gripped by the user.

[0070] In an embodiment, shown in figs 3A to 3D, of the cap 20, which can be adopted when the connection element is in the aforementioned second embodiment, each opening 14 may actually have a different connection portion 141 with the aforementioned at least partially threaded surface 15, while on the other hand, the surface 21 may include a connection portion 24 with an at least partially counter-threaded surface 25.

[0071] According to the invention, the surface 25 extends at the entire perimeter 24' of the connection portion 24.

[0072] In other words, the counter-threaded surface 25 may extend along the entire perimeter 24'.

[0073] The complete threading allows to maximise the stability of the coupling between the cap 20 and a respective opening 14, as well as minimise the leakage of air.

[0074] As a matter of fact, the contact between the surface of the threading 15 and of the counter-threading 25 may ensure a physical blocking to the flow of air through the opening 14 due to the presence of threads extending along the entire perimeter of the coupling surfaces.

[0075] Advantageously, the surface 15 may be made on the thickness of the wall 11 at the opening 14, while the connection section 24 may be a protruding profile with respect to the surface 21 along which there may be provided the counter-threading 25, as particularly shown in fig. 3D.

[0076] Advantageously, the perimeter edge 24' of the connection portion 24 may extend to a predetermined distance d from the perimeter edge 210 of the planar surface 21.

[0077] In other words, the surface 21 may include an annular edge portion 26 interposed between the connection portion 24, more precisely the perimeter edge 24' of the latter, and the perimeter edge 210.

[0078] When the cap 20 will be connected with the respective opening 14, therefore when the threading 15 will be coupled with counter-threading 25, the flat edge portion 26 may abut against a portion 16 surrounding the edge perimeter 14' of the opening 14 on the exposed surface of wall 11, be it the layer 11' or the insulating layer.

[0079] In this manner, the contact between surfaces 16 and 26 will allow to prevent leakage of air from the structure 10 just like it will allow to prevent accidental de-coupling between cap 20 and the opening 14, making the connection between them extremely stable and secure.

[0080] As shown in fig. 6A, each cap 20 is circular-shaped and therefore the aforementioned flat edge portion 26 may be annular, while the connection portion 24 defines a substantially circular path.

[0081] In a preferred but not exclusive example, the surface 22 may also be coated with the insulating material mentioned above to ensure correct thermal and acoustic insulation.

[0082] Advantageously, each cap 20 may be completely made of polymeric material, which may be selected from PP, PVC, ABS.

[0083] For example, the caps 20 and connection elements 30 may be made of the same polymeric material or different polymeric materials.

[0084] It goes without saying that in any case, the polymeric material of layer 11' or of the section of the section 11 of the structure 10 may be compatible with the polymeric material of the caps 20 and connection elements 30.

[0085] In a preferred but not exclusive example, the layer 11' may be completely made of PVC, while the caps 20 and the connection elements 30 may be completely made of PP.

[0086] In this manner, the PVC of the layer 11' will confer particular strength to the structure 10, while the PP of the caps 20 and the connection elements 30 will confer to the same strength and elasticity in order to prevent cracks from forming due to colder temperatures and to facilitate connection with the secondary opening air pipes.

[0087] Advantageously, the kit 1 may further include accessories that are per se known and useful for the installation of the plenum 2.

[0088] For example, the kit 1 may include adjustable pipe clamps, gaskets and everything needed to optimise the operation of the air distribution unit.

[0089] A further aspect of the invention according to claim 8 relates to a plenum 2 obtained by means of the kit 1 described above and therefore having the characteristics mentioned above with reference to the main collector structure 10, to each connection element 30 and, where appropriate, to each cap 20.

[0090] Therefore, for the sake of ease of description, these characteristics will not be reported here once again, but for them, reference shall be made to the content described above.

[0091] Furthermore, a further aspect of the invention relates to a method according to claim 9, for assembling the kit 1 mentioned above for obtaining a plenum 2 for distributing air.

[0092] The user, therefore, typically a technician specialised in air conditioning, using the kit 1 may subsequently connect one or more connection elements 30 at the respective openings 14 designed for connection with a respective fluidic connection pipe.

[0093] Since there are several openings 14, the user may therefore connect one or more closing caps 20 at the respective openings 14 not designed for connection with a respective air connection pipe.

[0094] It goes without saying that the connection of the caps 20 and of the connection elements 30 with the respective openings 14 may be carried out simultaneously or alternately in succession.

[0095] It is clear that the connection of the plenum 2 with the connection pipes with the central unit and with the connection pipes with the individual spaces may be carried out previously, simultaneously or subsequently to any step of the method mentioned above, at a time considered most favourable to carry out the connection.

[0096] In the light of the above, the invention attains the preset objectives.

[0097] The invention is susceptible to modifications and variants all falling within the inventive concept outlined in the attached claims.

[0098] Should the technical elements specified in the claims be followed by reference signs, such reference signs are included with the sole purpose of improving the intelligibility of the invention and, therefore, they do not entail any limitation to the claimed scope of protection.

Claims

1. A kit for obtaining a plenum (2) for distributing air which can be fluidically connected with a central air unit by means of at least one first connection pipe or directly and with at least one space of interest by means of at least one second connection pipe or facing thereof, comprising: - a main box-like collector structure (10) provided with a plurality of walls (11) defining an internal compartment (12) and comprising at least one first main opening (13) which can be operatively connected with the central air unit by means of the at least one first connection pipe or at least one second main opening which can be operatively and fluidly directly connected with the central air unit, said plurality of walls (11) including a plurality of secondary openings (14) which can be operatively and fluidly connected with the space of interest by means of the at least one second connection pipe; - at least one connection element (30) having a first portion (31) which can be coupled with the at least one second connection pipe and a second portion (32) which can be configured to be directly removably coupled with at least one secondary opening (14) of said plurality of secondary openings (14); - at least one cap (20) configured to be directly removably coupled with a respective said secondary opening (14) of said plurality of said at least one secondary opening (14), wherein the coupling between each secondary opening (14) with a respective said at least one closing cap (20) or with a respective said at least one connection element (30) occurs in an alternative and selective manner to configure the plenum (2), the latter being susceptible to: - house said at least one cap (20) at each secondary opening (14) not designed for connection with a respective the at least one second connection pipe; and - house said at least one connection element (30) at each secondary opening (14) designed for connection with a respective the at least one second connection pipe for the fluidic connection with the space of interest; characterized in that at least one layer (11') of said plurality of walls (11) or at least one section of the latter, said at least one connection element (30) and said at least one cap (20) are at least partially made of polymeric material; wherein each secondary opening of said plurality of secondary openings (14) includes at least one third connection portion (141) with a first threaded surface (15), said second portion (32) of said at least one first connection element (30) including a respective second counter-threaded surface (35) and said at least one closing cap (20) including a further third connection portion (24) with a respective third counter-threaded surface (25), each second and third counter-threaded surface (35, 25) being susceptible to be mutually screwable with a respective said first threaded surface (15) to allow the integrally joined connection with said at least one third connection portion (141); and wherein said first threaded surface (15) extends at the entire perimeter (14') of each secondary opening of said plurality of secondary openings (14), said second and third counter-threaded surface (25, 35) extending at the entire perimeter (33; 24') of said second portion (32) of said at least one first connection element (30) and of said third connection portion (24) of said at least one cap (20).

2. Kit according to the preceding claim, wherein said at least one cap (20) includes a planar surface (21) designed to remain in use facing said compartment (12) of said collector structure (10) and including said second completely counter-threaded surface (25) of said at least one cap (20), the perimeter (24') of said third connection portion (24) of said at least one cap (20) extending to a predetermined distance (d) from the perimeter edge (210) of said planar surface (21) of said at least one cap (20).

3. Kit according to the preceding claim, wherein said planar surface (21) of said at least one cap (20) includes a first annular edge portion (26) interposed between said third connection portion (24) and said perimeter edge (210) of said planar surface (21) of said at least one cap (20), said first annular edge portion (26) being susceptible to mutually impact a portion (16) surrounding the perimeter edge (14') of each secondary opening of said plurality of secondary openings (14) on the exposed surface of said wall (11) or of said at least one layer (11') of the latter.

4. Kit according to any of the preceding claims, wherein said second portion (32) of said at least one first connection element (30) includes a perimeter wall (32') extending along the entire perimeter (33) of said second portion (32) at a second predetermined distance (d') from the perimeter edge (310) of the outer surface (30') of said at least one first connection element (30).

5. Kit according to the preceding claim, wherein said at least one first connection element (30) includes a second annular edge portion (36) interposed between said outer surface (32') and said perimeter edge (310) of said outer surface (30') of said at least one first connection element (30), said second annular edge portion (36) being perpendicular to said outer surface (30') and being susceptible to at least partially impact a portion (16) surrounding the perimeter edge (14') of each secondary opening of said plurality of secondary openings (14) on the exposed surface of said wall (11) of said at least one layer (11') of the latter.

6. Kit according to any one of the preceding claims, wherein said at least one layer (11') of said plurality of walls (11) or said at least one section of the latter and said at least one connection element (30) are completely made of polymeric material, said at least one layer (11') being made of a first material selected from PVC, ABS, PP, said at least one connection element (30) being made of a second material selected from PVC, ABS, PP, said first and second material being compatible with each other.

7. Kit according to any of the preceding claims, wherein said at least one closing cap (20) is completely made of polymeric material, the latter being said second material selected from PVC, ABS, PP.

8. A plenum (2) for distributing air which can be fluidically connected with a central air unit by means of at least one first connection pipe or directly and with at least one space of interest by means of at least one second connection pipe or facing thereof, comprising: - a main box-like collector structure (10) provided with a plurality of walls (11) defining an internal compartment (12) and comprising at least one first main opening (13) operatively connected with the central air unit by means of the at least one first connection pipe or at least one second main opening which can be operatively and fluidly directly connected with the central air unit, said plurality of walls (11) including a plurality of secondary openings (14) operatively and fluidly connected with the space of interest by means of the at least one second connection pipe; - at least one connection element (30) having a first portion (31) coupled with at least one second connection pipe and a second portion (32) configured to be directly removably coupled with at least one secondary opening (14) of said plurality of secondary openings (14); - at least one cap (20) directly removably coupled with a respective secondary opening (14) of said plurality of said at least one secondary opening (14), wherein the coupling between each secondary opening (14) with a respective said at least one closing cap (20) or with a respective said at least one connection element (30) occurs in an alternative and selective manner to configure the plenum (2), the latter: - housing said at least one cap (20) at each secondary opening (14) not connected with a respective the at least one second connection pipe; and - housing said at least one connection element (30) at each secondary opening (14) connected with a respective the at least one second connection pipe for the fluidic connection with the space of interest; characterized in that at least one layer (11') of said plurality of walls (11) or at least one section of the latter, said at least one connection element (30) and said at least one cap (20) are at least partially made of polymeric material; wherein each secondary opening of said plurality of secondary openings (14) includes at least one third connection portion (141) with a first threaded surface (15), said second portion (32) of said at least one first connection element (30) including a respective second counter-threaded surface (35) and said at least one closing cap (20) including a further third connection portion (24) with a respective third counter-threaded surface (25), each second and third counter-threaded surface (35, 25) being mutually screwed with a respective said first threaded surface (15) to allow the integrally joined connection with said at least one third connection portion (141); and wherein said first threaded surface (15) extends at the entire perimeter (14') of each secondary opening of said plurality of secondary openings (14), said second and third counter-threaded surface (25, 35) extending at the entire perimeter (33; 24') of said second portion (32) of said at least one first connection element (30) and of said third connection portion (24) of said at least one cap (20).

9. A method for assembling a kit for obtaining a plenum (2) for distributing air which can be fluidically connected with a central air unit by means of at least one first connection pipe or directly and with at least one space of interest by means of at least one second connection pipe or facing thereof, comprising the steps of: - providing one kit according to one or more of claims 1 to 7; - first connection of said at least one connection element (30) with a respective secondary opening (14) designed for connection with a respective at least one second connection pipe; wherein simultaneously with said step for first connection or one in succession to the other there is carried out a step for second connection of said at least one cap (20) at each secondary opening (14) not designed for connection with a respective at least one second connection pipe.

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