Ventilation system

Abstract

To provide a ventilation system which does not cause a user to feel discomfort caused by cool air even in ventilation during winter at a cold area and enables reduction of energy costs needed for heating of an indoor space.SOLUTION: A ventilation system includes: an inlet 4 for taking outdoor air in; a heating chamber 2 for heating the outdoor air taken from the inlet 4; a water heater 7 installed in the heating chamber 2; a hot liquid supply pipe 11 connected to the water heater 7 and configured to supply a liquid heated by the water heater 7 to each room; a supply port 15 which is provided at the heating chamber 2 to supply heated outdoor air heated in the heating chamber 2 to each room R; an air supply port 20 for blowing the heated outdoor air to supply the heated outdoor air to each room R; an air supply duct 16 which guides the heated outdoor air to the air supply port 20; an exhaust device 23 for exhausting air in a living space; and an exhaust duct 27 which guides air suctioned by the exhaust device 23 to the outside of the living space. The outdoor air is heated by a liquid heated by the water heater 7 and flowing through the hot liquid supply pipe 11.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a ventilation system, and more particularly to a ventilation system for a highly airtight and highly insulated house. [Background technology]

[0002] In recent years, the airtightness of homes has improved, and constant ventilation of living spaces, i.e., 24-hour ventilation, has become mandatory. There are three types of ventilation: Type 1, Type 2, and Type 3. Type 1 ventilation uses a ventilation machine to both supply air from outside and exhaust air from inside. Type 2 ventilation uses a ventilation machine to supply air from outside and natural exhaust to exhaust air from inside. Type 3 ventilation uses natural supply air from outside and natural exhaust to exhaust air from inside. Generally, Type 1 and Type 3 ventilation are the most widely used 24-hour ventilation methods.

[0003] Conventionally, there has been known a heat exchange ventilator that includes an exhaust air duct for exhausting indoor air to the outdoors and an intake air duct for supplying outdoor air into the room, and that performs ventilation while exchanging heat between the exhaust air flowing through the exhaust air duct and the intake air flowing through the intake air duct by passing them through a heat exchanger. Such a heat exchange ventilator can supply air at an outdoor air temperature close to room temperature (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2009-250451 Summary of the Invention [Problem to be solved by the invention]

[0005] However, when the temperature difference between the indoor air and the outdoor air is large, even if heat is exchanged between the indoor air and the outdoor air, the supply air temperature does not approach the room temperature sufficiently, which has caused problems, particularly in cold regions, such as the discomfort of cold air during winter ventilation. Also, when the room is heated, air at a lower temperature than the indoor air is taken in, resulting in high energy costs for heating the room.

[0006] Therefore, the present invention has been made in consideration of the above problems, and aims to provide a ventilation system that does not make users feel uncomfortable due to cold air, even when ventilating in winter in cold regions, and can reduce the energy costs required for heating the room. [Means for solving the problem]

[0007] In order to solve the above problems, the ventilation system of the present invention comprises an intake port for bringing outdoor air indoors, a heating chamber for heating the outdoor air taken in through the intake port, a water heater and / or boiler installed in the heating chamber, a hot liquid supply pipe connected to the water heater and / or boiler and supplying liquid heated by the water heater and / or boiler to each room, a supply port installed in the heating chamber for supplying heated outdoor air heated in the heating chamber to each room, an air intake port for blowing the heated outdoor air out and supplying it to each room, an air intake duct connecting the supply device to the air intake port, an exhaust device for discharging air from within the living space, and an exhaust duct for directing the air sucked in by the exhaust device outside the living space, and the outdoor air is heated by the liquid heated by the water heater and / or boiler and flowing through the hot liquid supply pipe.

[0008] In the above-described ventilation system, it is preferable that the supply port is provided with a supply device for sending the heated outside air out of the heating chamber.

[0009] Furthermore, it is preferable that the above-mentioned ventilation system has an exhaust port provided on the floor for discharging indoor air below the floor, and the exhaust duct is connected to the exhaust port.

[0010] Furthermore, in the above-mentioned ventilation system, the heating chamber is provided with a door frame having a frame material to which the door can be attached so that it can be opened and closed freely, and a door stop portion attached to the frame material and against which the door abuts when the door is closed, and it is preferable that an elastic packing material is provided at the abutting portion of the door stop portion with the door.

[0011] The above-mentioned ventilation system has an air flow path that takes in outside air, an outside air heating unit that heats the taken-in outside air, a blower that sends the air heated by the outside air heating unit indoors, a heater that is provided in the outside air heating unit and heats the outside air taken in by the outside air heating unit, and a solar system that has a power generation panel that generates electricity using sunlight, and it is preferable that the heater is powered by electricity generated by the power generation panel.

[0012] In the above-mentioned ventilation system, in the area of the heating room where the water heater and / or boiler is not installed, the hot liquid supply pipe for heating is placed in an exposed state on the concrete floor, and it is preferable that cypress mats are laid above the hot liquid supply pipe for heating as flooring material. [Effects of the Invention]

[0013] According to the ventilation system of the present invention, even in winter ventilation in cold regions, users do not feel uncomfortable due to cold air, and the energy costs required for heating the room can be reduced. [Brief explanation of the drawings]

[0014] [Figure 1] 1 is a schematic diagram showing the configuration of a ventilation system according to an embodiment of the present invention. [Figure 2] 1 is a schematic diagram showing the state of a heating chamber of a ventilation system according to an embodiment of the present invention. FIG. [Figure 3]FIG. 10 is a schematic diagram showing the piping of hot liquid supply pipes in an area of a heating room where a water heater and / or boiler is not installed. [Figure 4] FIG. 2 is a schematic diagram showing the structure of a door of a heating chamber of a ventilation system according to an embodiment of the present invention. [Figure 5] FIG. 10 is a schematic diagram showing the structure of a modified solar system of a ventilation system according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0015] An embodiment of a ventilation system according to the present invention will now be described. Figures 1 to 4 show an example of a ventilation system 1 according to this embodiment.

[0016] The ventilation system 1 according to this embodiment can be suitably used in a highly airtight and highly insulated house. A highly airtight and highly insulated house is, for example, a house with a UA value of preferably 0.6 W / m 2 ·K or less, more preferably 0.46 W / m 2 ·K or less, preferably 0.3W / m 2 The house should have a C value of 2cm or less. 2 / m 2 Less than 1 cm, more preferably 2 / m 2 Less than 0.5cm, preferably 0.5cm 2 / m 2 The following is the result.

[0017] As shown in Figures 1 and 2, the ventilation system 1 according to this embodiment has a heating room 2 for heating outside air inside a highly airtight and highly insulated house. An intake port 4 for bringing outside air into the room is provided on an exterior wall 3 of the heating room 2, and the outside air is naturally drawn into the room. A vent cap 5 may be provided on the outdoor side of the intake port 4, and a grill 6 may be provided on the indoor side.

[0018] In the ventilation system 1 according to this embodiment, outside air is naturally drawn into the room, but an air intake device that draws outside air into the room may be provided at the air intake 4. The air intake device is configured by housing a motor and a fan inside a housing that is attached to the air intake 4 provided on the exterior wall 3 of the building. A so-called pipe fan can be used as the air intake device.

[0019] The heating room 2 is a room for heating the outside air taken in from outside, and the air heated here (hereinafter also referred to as heated outside air) is supplied to the whole building as fresh air. Therefore, the heating room 2 has a size large enough to take in the outside air that can be supplied to the whole building when ventilation is performed 24 hours a day. The area of the heating room 2 is 1.2 m 2 ~6.6m 2 It is preferable that:

[0020] In the ventilation system 1 according to the present invention, a water heater and / or boiler is installed in the heating room 2. The water heater can be any of an electric water heater, a gas water heater, an oil-fired water heater, or a water heater that uses gas as fuel to generate electricity and hot water. In the case of an electric water heater, a heat pump water heater is preferred, and a hot water storage unit is installed in the heating room 2. In the case of a gas water heater or an oil-fired water heater, a water heater equipped with a secondary heat exchanger that further heats the water using exhaust heat is preferred, and the gas water heater or oil-fired water heater itself is installed in the heating room 2. In the case of a power-generating water heater, a backup heat source unit configured separately from the main unit is installed in the heating room 2. Each water heater may have a heating function that supplies hot water to heating appliances such as floor heating, panel heaters, and hot water room heaters. The boiler is a heat source boiler that heats the heat medium used in heating appliances such as floor heating, panel heaters, and hot water room heaters. Only a water heater or only a boiler may be installed in the heating room 2, or both a water heater and a boiler may be installed. In this embodiment, a gas water heater 7 having a heating function is installed.

[0021] The heating compartment 2 is preferably provided with a door 8 (see FIG. 4) for accessing and exiting the heating compartment 2 for inspection, repair, and operation of the water heater and / or boiler. In this case, the heating compartment 2 preferably has high airtightness and thermal insulation properties to enhance the heat retention effect within the heating compartment 2. For this reason, as shown in FIG. 4, the heating compartment 2 is provided with a door frame 9 having a frame member 91 to which the door 8 is attached so that it can be opened and closed, and a door stop portion 92 attached to the frame member 91 and against which the door 8 abuts when closed, and it is preferable that an elastic packing material 10 is provided at the abutting portion of the door stop portion 92 with the door 8. It is also preferable to use a door 8 with thermal insulation properties. For example, it is preferable to use a door with double-glazed glass fitted into the frame body, or a door with an insulating material such as rigid foam urethane filled in the internal space between the front and back panels.

[0022] The ventilation system 1 according to the present invention also has a hot liquid supply pipe 11 connected to a water heater and / or boiler, which supplies liquid heated by the water heater and / or boiler to each room R. The liquid heated by the water heater and / or boiler is hot water used in the kitchen K, bathroom, washroom, etc., and / or a heat medium used in heating appliances. The heat medium may be hot water or antifreeze. In this embodiment, the gas water heater 7 having a heating function is connected, as the hot liquid supply pipe 11, with a hot water supply hot liquid supply pipe 111 that supplies hot water to the kitchen K, bathroom (not shown), washroom (not shown), etc., and a heating hot liquid supply pipe 112 that supplies hot water, which is a heat medium, to heating appliances such as a floor heater 12, a panel heater 13, and a hot water room heater 14. The hot liquid supply pipes 11 are piped to each room R according to their respective uses.

[0023] As shown in Fig. 3, it is preferable that a heating room heating pipe 35 for heating the heating room 2 is installed in the heating room 2, branching off from the heating hot liquid supply pipe 112, in the same way as the floor heating 12. In addition, in an area of the heating room 2 where a water heater and / or boiler is not installed, the heating room heating pipe 35 and the heating hot liquid supply pipe 112 are placed in an exposed state on the concrete floor, and it is preferable that a Japanese cypress lattice 32 is laid above the heating hot liquid supply pipe 112 as flooring material.

[0024] The ventilation system 1 also has a supply port 15 for supplying heated outside air heated in the heating chamber 2 to each room R. A supply device 17 is preferably provided near the supply port 15, sending the heated outside air from the supply port 15 to an air intake duct 16 (described below) and supplying the heated outside air to each room R. In this embodiment, the supply port 15 is provided on the ceiling of the heating chamber 2. The supply device 17 is attached to the supply port 15 with its housing 171 protruding from the ceiling surface, and a motor (not shown) and a fan 172 are provided inside the housing 171. A so-called duct fan can be used as the supply device 17. Protruding the supply device 17 from the ceiling surface facilitates installation and maintenance. A filter 18 and a grill 19 are preferably provided at the supply port 15.

[0025] In the ventilation system 1 according to the present invention, the supply device 17 is provided, but it is not necessarily provided. In particular, if an air intake device is provided at the intake port 4, the supply device 17 does not necessarily have to be provided.

[0026] The ventilation system 1 also has an air intake 20 for supplying heated outside air sent out by a supply device 17 from inside the heating chamber 2 to each room R. The air intake 20 is preferably provided in the ceiling of each room R on the first floor and in the floor of each room R on the second floor, but this is not limited thereto and the air intake 20 may also be provided in the ceiling of each room R on the second floor. Furthermore, the air intake 20 may be provided in the ceiling of a hallway or the like so that heated air can be distributed into each room R through an opening when the door of each room R is open and through a gap under the door when the door is closed. The air intake 20 is preferably provided with a grill 21.

[0027] The ventilation system 1 also has an air supply duct 16 that connects the supply device 17 and the air supply ports 20, and the air supply duct 16 is piped toward each air supply port 20 to the inter-floor KK or a predetermined duct space D. An intermediate-mounted duct fan (not shown) may be inserted into the air supply duct 16 to obtain the required air volume downstream.

[0028] The ventilation system 1 also has an exhaust device 23 for discharging dirty indoor air. The exhaust device 23 is preferably installed on the ceiling of a room other than a living room, such as a toilet, utility terrace, or walk-in closet on the first floor, but is not limited thereto and may also be installed on the ceiling of a room other than a living room on the second floor. In this embodiment, an exhaust port 24 for discharging air from the living space is provided on the ceiling of the corridor, and the exhaust device 23 is equipped with a motor (not shown) and a fan 232 inside a housing 231 attached to the exhaust port 24. A so-called duct fan can be used as the exhaust device 23. The exhaust port 24 is preferably equipped with a filter 25 and a grill 26.

[0029] The ventilation system 1 preferably has an air intake 34 for drawing in air from the living space. On the first floor, the air intake 34 is preferably provided in the ceiling of a room other than the living room, and on the second floor, the air intake 34 is preferably provided in the floor of a room other than the living room, but this is not limited to this and the air intake 34 may also be provided in the ceiling on the second floor. The exhaust device 23 sucks out dirty air from the opening of each room R when the door is open, or from the gap under the door when the door is closed, and then discharges it from the exhaust vent 24 and the air intake 34.

[0030] The ventilation system 1 also has an exhaust duct 27 that guides air drawn in through the exhaust device 23 and the intake port 34 to the outside of the living space. An exhaust port 28 that communicates with the underfloor space Y and exhausts indoor air to the underfloor space Y is provided in the floor, and the downstream end of the exhaust duct 27 is connected to the exhaust port 28. In this embodiment, the exhaust port 28 is provided in the floor, but the exhaust port 28 may also be provided in an exterior wall and exhaust indoor air to the outdoors. The exhaust duct 27 is piped toward the exhaust port 28 to the inter-floor space KK or a predetermined duct space D.

[0031] According to the ventilation system 1 of this embodiment, the air heated in the heating chamber 2 is sent outside the heating chamber 2 by a supply device 17 installed in the heating chamber 2, and fresh outside air is naturally supplied into the heating chamber 2 through the intake port 4.

[0032] A gas water heater 7 with heating function is installed in the heating compartment 2, and is connected to a hot water supply pipe 111 for hot water supply and a hot water supply pipe 112 for heating. That is, the heating compartment 2 is the starting point of the hot water supply pipe 111 and the hot water supply pipe 112, where the hot water supply pipe 11 converges and where the hot water with the highest temperature flows. Therefore, fresh outside air taken into the heating compartment 2 is sufficiently heated by the liquid flowing through the hot water supply pipe 11. Furthermore, the gas water heater 7 burns gas internally, and the resulting heat converts the water passing through the heat exchanger into hot water, so heat is also transferred to the housing of the gas water heater 7. Even in a water heater with a secondary heat exchanger, the exhaust gas discharged from the exhaust pipe 33 is approximately 50°C, so heat is also transferred to the exhaust pipe 33. Therefore, the fresh outside air taken into the heating compartment 2 is also heated by this heat.

[0033] The heating room 2 is installed in a highly airtight and insulated house, and the door 8 leading in and out of the heating room 2 is also airtight and insulated, making the heating room 2 itself highly airtight and insulated. As a result, heat from the liquid flowing through the hot liquid supply pipe 11 and heat from the gas water heater 7 is insulated and does not easily escape outside the heating room 2, and the outside air taken into the heating room 2 is efficiently heated.

[0034] Furthermore, since the heating room 2 itself is highly airtight and highly insulated, outdoor noise coming in through the intake 4 and the combustion noise of the gas water heater 7 are blocked out, making the living space quiet.

[0035] The heated outside air heated in the heating chamber 2 is sent out from the supply port 15 by the supply device 17, passes through the air intake duct 16 and is discharged from the air intake port 20 provided on the ceiling or the like of each room R. At this time, the air discharged from the air intake port 20 is heated outside air that has been sufficiently heated in the heating chamber 2, so the user does not feel uncomfortable due to cold air.

[0036] In addition, since heated outside air is supplied to each room R, the energy costs required for heating the rooms can be reduced, and the heat used to heat the outside air in the heating room 2 is heat that would normally be wasted, so no new energy is required for heating, resulting in energy savings.

[0037] In the area of the heating room 2 where a water heater and / or boiler is not installed, the heating hot liquid supply pipe 112 is placed in an exposed state on the concrete floor, and a cypress board 32 is laid above the heating hot liquid supply pipe 112 as flooring material, so that the heat of the hot liquid flowing through the heating hot liquid supply pipe 112 is more efficiently transferred to the outside air taken into the heating room 2.

[0038] Furthermore, if cypress mats 32 are laid on the floor of the heating room 2, the aromatic, antibacterial, deodorizing, and insect-repellent components of the cypress will be diffused into the heated outside air within the heating room 2 and expelled from the air intakes 20 provided in the ceilings of each room R, etc., so that aromatic, antibacterial, deodorizing, and insect-repellent effects can be expected in each room R.

[0039] Furthermore, dirty air within the living space is sent out by the exhaust device 23 from the exhaust port 24 and the intake port 34, passes through the exhaust duct 27, and is discharged from the exhaust port 28 into the underfloor Y. Because air of the same temperature as that within the room is discharged from the exhaust port 28, it is possible to reduce the humidity under the floor Y, particularly in the case of a continuous foundation, and to prevent condensation, mold, and mites under the floor Y. Furthermore, sound insulation against outdoor noise within the living space is improved compared to when the exhaust port 28 is provided on the exterior wall 3 of the building.

[0040] Next, a modified example of the ventilation system 1 according to this embodiment will be described. As shown in Fig. 5, the ventilation system 1 may have a solar system 30 that takes in outside air heated by a heater (not shown) driven by electricity generated by sunlight into the room. The solar system 30 has an air flow path 301 that takes in outside air, an outside air heating section 302 for heating the taken-in air, and a blower 303 that blows the air heated in the outside air heating section 302 into the room. The solar system 30 is preferably provided outside the outer wall 3 of the heating room 2.

[0041] The solar system 30 has a rectangular frame 304, and a front panel 305 is fitted into the front side of the frame 304. The frame 304 is preferably made of aluminum or an aluminum alloy, and the front panel 305 is preferably made of a metal plate such as a glass plate or a colored steel plate. A back panel 306 having a plurality of holes 305 for taking in outside air is fitted into the back side of the frame 304. The back panel 306 is preferably made of a metal plate such as aluminum or an aluminum alloy. A breathable insulating material 307 is provided on the inside of the back panel 306, i.e., on the front panel 305 side. The breathable insulating material 307 is preferably made of felt, for example.

[0042] The solar system main body is made up of frame 304, front panel 305, heat insulating material 307, and back panel 306, and it is preferable that the solar system main body is provided outside the outer wall 3 of heating chamber 2. In addition, the solar system main body is provided with back panel 306 installed at a predetermined distance from the outer wall 3 of heating chamber 2, and gap 308 between this back panel 306 and outer wall 3 of heating chamber 2 and holes 313 provided in back panel 306 form air flow path 301 that takes in outside air.

[0043] Furthermore, the space formed by the frame 304, the front panel 305, and the heat insulating material 307 constitutes the outside air heating section 302. It is preferable that the outside air heating section 302 is provided with a heater (not shown), and the outside air taken in through the hole 313 in the back panel 306 is heated by the heater inside the outside air heating section 302.

[0044] The rear panel 306 is provided with an outlet 309 for sending the air heated in the outside air heating section 302 into the heating chamber 2, and the outlet is provided with a duct 310. The duct 310 is preferably inserted into an intake 4 provided in the outer wall 3 of the heating chamber 2.

[0045] A blower 303 is provided in the duct 310, which sends the air heated in the outside air heating section 302 into the heating chamber 2. The blower 303 is configured by holding a fan 3032 and a motor (not shown) in a housing 3031. The solar system 30 may also have a controller 311 for adjusting the heating temperature of the heater, turning the fan 3032 on and off, and the airflow rate of the fan 3032, and the controller 311 is preferably installed in the heating chamber 2 or another location that is easy to operate.

[0046] A power generation panel 312 that generates electricity using sunlight is provided within the outdoor air heating section 302, and the electricity generated by this power generation panel 312 may be used to power a heater (not shown) or a motor (not shown).

[0047] In the solar system described above, when power generation panel 312 is not generating electricity from sunlight, the heater does not operate, but in this case outside air is taken into the room through intake 4 without being heated by the heater, and is heated in heated compartment 2. In addition, in summer, it is advisable to use controller 311 to adjust the heating temperature of the heater so that outside air is not heated, but instead outside air is taken in through intake 4 by blower 303.

[0048] The solar system 30 is not limited to the above, and any known solar system that uses sunlight to heat and take heated air indoors can be used. In this embodiment, the solar system 30 is installed outside the outer wall 3 of the heating room 2, but if the heating room 2 does not face the outer wall 3 or if the outer wall 3 of the heating room 2 is in a place that does not get much sunlight, it is preferable to install the solar system 30 in a place suitable for collecting heat and install a duct to take the air heated by the solar system 30 into the heating room 2.

[0049] By providing the solar system 30, the outside air preheated by the outside air heating section 302 of the solar system 30 is taken in through an intake 4 provided on the outer wall 3 of the heating room 2, so that the outside air can be heated with more energy savings.

[0050] The ventilation system according to the present invention includes the following aspects.

[0051] [1] A ventilation system comprising an intake port for bringing outdoor air indoors, a heating room for heating the outdoor air taken in through the intake port, a water heater and / or boiler installed in the heating room, a hot liquid supply pipe connected to the water heater and / or boiler and supplying liquid heated by the water heater and / or boiler to each room, a supply port installed in the heating room and supplying heated outdoor air heated in the heating room to each room, an air intake port for blowing the heated outdoor air out and supplying it to each room, an air intake duct for directing the heated outdoor air to the air intake port, an exhaust device for discharging air from within the living space, and an exhaust duct for directing air sucked by the exhaust device to outside the living space, wherein the outdoor air is heated by the water heater and / or boiler and is heated by the liquid flowing through the hot liquid supply pipe.

[0052] [2] The ventilation system according to [1], wherein the supply port is provided with a supply device for sending heated outside air out of the heated chamber.

[0053] [3] A ventilation system according to [1] or [2], which has an exhaust port installed on the floor and which discharges indoor air below the floor, and an exhaust duct connected to the exhaust port.

[0054] [4] A ventilation system according to any one of [1] to [3], wherein the heating chamber is provided with a door frame having a frame material to which the door can be attached so as to be able to open and close freely, and a door stop portion attached to the frame material and against which the door abuts when the door is closed, and wherein an elastic packing material is provided at the abutting portion of the door stop portion with the door.

[0055] [5] A ventilation system described in any one of [1] to [4], comprising a solar system having an air flow path that takes in outside air, an outside air heating unit that heats the taken-in outside air, a blower that sends the air heated by the outside air heating unit indoors, a heater provided in the outside air heating unit that heats the outside air taken in by the outside air heating unit, and a power generation panel that generates electricity using sunlight, wherein the heater is powered by electricity generated by the power generation panel.

[0056] [6] In the area of the heating room where the water heater and / or boiler is not installed, the hot liquid supply pipe for heating is placed in an exposed state on the concrete floor, and above the hot liquid supply pipe for heating 112, a cypress lattice is laid as flooring material. [1] A ventilation system described in any one of [1] to [5]. [Explanation of symbols]

[0057] 1: Ventilation system 2:Heating room 4: Intake port 7: Gas water heater 8: Door 9: Door frame 91: Frame material 91: Doorstop 10:Packing material 11: Hot liquid supply pipe 111: Hot water supply pipe 112: Hot liquid supply pipe for heating 15: Supply port 16: Air supply duct 17: Feeding device 171: Cabinet 172: Fan 20:Air supply port 23: Exhaust system 231: Cabinet 232: Fan 24: Exhaust port 27: Exhaust duct 28: Outlet 30: Solar System 301: Air flow path 302: Outdoor air heating section 303: Blower 32: Sunoko R: Room KK: Floor D: Duct space Y: Underfloor

Claims

1. An intake for bringing outdoor air indoors; a heating chamber for heating the outside air taken in through the intake port; A water heater and / or a boiler installed in the heating room; a hot liquid supply pipe connected to the water heater and / or the boiler and supplying liquid heated by the water heater and / or the boiler to each room; a supply port provided in the heating chamber for supplying heated outside air heated in the heating chamber to each of the rooms; an air intake port for blowing out the heated outside air and supplying it to each of the rooms; an air intake duct that guides the heated outside air to the air intake port; an exhaust device for discharging air from the living space; an exhaust duct that guides the air sucked by the exhaust device to the outside of the living space; and A ventilation system characterized in that the outside air is heated by the liquid heated by the water heater and / or the boiler and flowing through the hot liquid supply pipe.

2. 2. The ventilation system according to claim 1, wherein the supply port is provided with a supply device for sending the heated outside air out of the heating chamber.

3. 3. The ventilation system according to claim 1, further comprising an exhaust port provided in the floor for discharging indoor air below the floor, the exhaust duct being connected to the exhaust port.

4. The ventilation system described in claim 1 or claim 2, characterized in that the heating chamber is provided with a door frame having a frame material to which the door is attached so that it can be opened and closed freely, and a door stop portion attached to the frame material and against which the door abuts when the door is closed, and an elastic packing material is provided at the abutting portion of the door stop portion with the door.

5. 3. The ventilation system of claim 1, further comprising a solar system having an air flow path for taking in outside air, an outside air heating unit for heating the taken-in outside air, a blower for sending the air heated by the outside air heating unit indoors, a heater provided in the outside air heating unit for heating the outside air taken in by the outside air heating unit, and a power generation panel for generating electricity using sunlight, wherein the heater is powered by electricity generated by the power generation panel.

6. The ventilation system described in claim 1 or claim 2, characterized in that in the area of the heating room where the water heater and / or boiler is not installed, the hot liquid supply pipe for heating is placed in an exposed state on the concrete floor, and above the hot liquid supply pipe for heating 112, a cypress mat is laid as flooring material.

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