Having proper air exchange is a key factor in comfort in the home and the health of household members. And then the thought of creating proper ventilation. IN Lately There’s so much that’s missing on the air conditioning equipment market! It is difficult for an unprepared person to understand what he really necessary to create a comfortable microclimate in the apartment.
Let's figure out what, for example, air intakes are used for ventilation valves, air handling units and recuperators.
Used in natural and mechanical ventilation. The valve has protection against insects, noise, dust, wall freezing and condensation, as well as regulation of the amount of incoming air. You can regulate the flow of air passing through the valve using the handle on the head of the valve or a special cord if the valve is located high. On the valve head there is a scale indicating the degree of valve opening. The valve is continuously adjustable until completely closed. KIV-125 does not require any energy consumption.
How does he work?
The existing exhaust hood (vent ducts located in the kitchen and bathrooms), removing exhaust air, creates a vacuum in the apartment, and due to this vacuum, fresh outside air enters the room through the KIV-125 valves.
Advantages:
* Double air purification.
* Built-in two-stage ceramic heater - for ventilation during the cold season.
* Highly efficient fan - for quiet operation (from 21 dB) with minimal power consumption.
* Productivity from 40 to 120 m 3 / h
The air recuperator ventilates your room by removal old air and influx new, cleaned with a filter, indoors. In the process of air exchange, recovery occurs, the transfer of energy from the outgoing air to the incoming air. In this way, the recuperator saves energy spent on heating in winter and air conditioning in summer.
* * * * *
For efficient work supply valve or installation the hood must be active.
An active hood is any stable working exhaust system- mechanical (using fans) or natural (ventilation ducts located in the kitchen and bathrooms). To guarantee the operation of ventilation in the apartment in any season, regardless of the floor, it is recommended to install exhaust fans
in kitchens and bathrooms.
Recuperators operate regardless of the presence of exhaust ducts. We remember that the tasks of recuperators, in addition to the supply of fresh air, include the removal of exhaust air.
BUT!
There is a natural hood in every home. That is why, in our opinion, installing recuperators in residential premises is inappropriate
. They are more likely to be suitable for rooms in which there is no hood at all (garage, barn, storage room, etc.). The promised energy savings are also controversial issue, since the volume of incoming air will clearly not be enough - no more than 40 m 3 / h. Is this what you wanted to achieve by taking care of the ventilation of your home? And you won’t feel the air warming up in cold weather either.
If you need a valid saving, then we recommend considering supply valves KIV-125. The performance of the valve depends on the vacuum created by the hood:
at a vacuum of 20 Pa (created by mechanical exhaust) - 50 m 3 / h;
at a vacuum of 10 Pa (creates natural exhaust) - 35 m 3 / h.
If you want greater influx of fresh , purified and, if necessary, noticeably heated air, it is worth thinking about the supply ventilation unit.
And one more important point:
for an external hole up to 150 mm (which is necessary for installation, for example, KIV-125 or iFresh) is not required
(if the building is not a cultural heritage site):
4.3.7.* Installation of air conditioning and ventilation systems without an outdoor unit with air supply through a hole in the wall with a diameter of up to 0.15 m, hidden by a fence grate, is allowed everywhere (for cultural heritage sites - in agreement with KGIOP).
*Government of the city of St. Petersburg "On approval of the rules for the maintenance and repair of facades of buildings and structures in St. Petersburg" (No. 1135 of September 14, 2006)
An external hole is required for installation of heat exchangers more diameter - 180 mm.
The idea is not new, but quite often I return to it and think about implementing it in my home. Therefore, I stole a detailed article mainly for myself, but perhaps it will be useful to someone else.
I would like to note that such a system will not only cool the house in the summer, but also heat it in the winter. You can't live without ventilation. And if in winter you draw air already heated by an earthen heat exchanger into the house, then heating costs will also decrease. This is especially true if you have stove heating or any open flame boiler. It is better to take the air for combustion from the street and preheat it. Efficiency will increase significantly. The only thing the authors did not notice was a solution to the condensate issue. And it may be in the heat exchanger pipes buried in the ground. And it is advisable to provide for the possibility of removing it by gravity with drainage into the soil. As an option, make part of the pipe at the lowest point from a drainage pipe with perforation. Well, lay the pipe above the water main so that it doesn’t get flooded.
Natural recuperator or free air conditioning For country house
Cooling the air in the summer is one of the primary tasks of the homeowner. This article will tell you how to use the energy around us for this purpose and make air conditioning practically free.
The importance of ventilation cannot be overestimated. We will not repeat what has been described many times and will focus on our own task - to cool and refresh the air in the house. Traditional ventilation systems can be quite expensive to install due to the cost of components and assemblies, as well as the cost of qualified installation work.
During operation, they consume a significant amount of electricity, especially for cooling the air mass, emit a lot of heat and create noise. The system described in this article is easy to install, energy efficient, does not require special skills and is intuitive. It’s worth noting right away that due to its simplicity, it has limited functions, but it provides for modernization in any area at any convenient time.
In our case, the term “recovery” is a synonym for the word “heat exchange”, therefore the concepts “recuperator” and “heat exchanger” are interchangeable. At the physical level, the process consists of cooling/heating air, changing its temperature due to the consumption of thermal energy, and then mixing. How and why this happens, we will look further.
Stable Energy Source
Pursuing the goal of lowering the room temperature in the summer, it is reasonable to ask the question: “Where to give the energy of the heated atmospheric air? How to cool it? Here the forces of nature come to our aid. The fact that at a certain depth the soil temperature is constant will be our main argument when justifying the energy efficiency of the system.
The soil is capable of endlessly exchanging energy - cooling and heating any medium (air, water), but only to its own temperature at a given depth, which remains constant due to the relative stability of the earth's core.
International practice
Of course, we are far from the first who decided to use the endless and free energy of the Earth. In European countries, which are usually called developed (Germany, Sweden, Belgium, etc.), they have been using this energy since the beginning of the last century. The successes achieved in this field are impressive.
Heat exchange systems for water below ground level are called “heat pumps.” These underground and underwater devices heat and cool the entire home. Standard projects have been developed for any building and it is possible to convert the house from a traditional (gas, electric) air conditioning system to heat pumps. In a similar, but more primitive way, this energy is used in our country by arranging underground food storage facilities (cellars).
What is good about a natural heat exchanger?
The operation of our recuperator is based on the same physical process as in heat pumps. Focusing on savings, we use this principle, adapting it to our own needs and local realities.
Problems that an adapted autonomous recuperator can solve:
Constant natural ventilation behind closed doors and windows.
Quickly replace indoor air with fresh air.
Cooling the air in the room.
Preparing the air mixture for subsequent actions.
Advantages:
Absolutely environmentally friendly. During installation and operation basic system not used toxic materials and there is no thermal release into the atmosphere.
Safety. The recuperator does not use electric motors (with a power of more than 100 W), chemical agents, or high voltage.
Simplicity and cheapness. For forced ventilation are used only rarely powerful fans power 100 W. Ventilation occurs naturally.
Oxygen is not burned during operation.
Low noise level.
Flaws:
the basic system does not provide for filtration, humidity control, heating or other processing of the air mixture (but allows for the possibility of installing appropriate equipment later).
Simple and clear system
An autonomous heat exchanger for a country house is a system of ventilation ducts, partially laid underground, included in the supply and exhaust ventilation circuit. In order to create such an “air conditioner”, it is not necessary to understand the intricacies of physical phenomena. Just knowing that it works is enough. You can verify this by going down into any basement, well or subway in the heat.
The operating principle is as follows:
Atmospheric air passes through pipes laid in the ground at a constant temperature (usually from +4 to +10 ° C).
In the underground part, cool soil absorbs thermal energy heated air.
Cooled air is delivered through ventilation ducts to the premises of the house.
Simultaneously exhaust fan removes saturated and heated air mixture (“old air”) from the room.
According to the principle of construction, such systems are divided into two main types: pipe and bunker.
Pipe - consists entirely of pipes. The design can be varied depending on the conditions of the site. Suitable for reconstructing a house without a spacious basement, but it will require a lot of work earthworks.Bunker or stone - the heat exchanger is a bunker filled with large stones. Occupies less area than a pipe one (you can arrange it in the basement of the house). Requires a basement or underground space. The best option during new construction.
We create internal system house ventilation ducts
In both cases, the ventilation ducts inside the house will be located approximately the same. Let's start with them.
A primitive supply and exhaust ventilation system consists of external and internal ventilation ducts connected into one network. Air outlets are located in the upper diagonally opposite corners of the rooms. In one there is an inflow, in the other there is an exhaust. In a one-story building, the main air ducts may be located in attic. In a two-story building, the supply and exhaust air ducts of the first floor will pass in boxes inscribed in interior decoration, second floor - in the attic. The location of the main air ducts should be determined for each house individually, taking into account the layout (location of walls and partitions). Tip. Premises where it is recommended supply and exhaust ventilation: living room, bedroom, children's room, kitchen, dining room, offices, pantry, recreation rooms, gym. In bathrooms and toilets there is only an exhaust fan. Not needed at all in corridors, vestibules, halls and loggias.
Rules for calculating the internal ventilation duct system:
Pipe sewer diameter 250 mm for supply distribution and combined outlet channels. Approximate consumption - two lengths of the house + height of the upper ceiling + 20%.
Sewer pipe (gray) with a diameter of 150 mm. Approximate consumption is three times the length of the house + 20%. For two-story house With equal area floors + 50%.
Pipe fasteners (based on the wall material) at the rate of 1 pc. by 70 cm.
Insulation (roll mineral wool) - 1 roll.
Foam, sealant, decorative grilles.
Elbows, revisions, couplings (1 piece per 70 cm).
Attention! Do not use 90° elbows, this will impede the passage of air and create noise. Combine 45° elbows (following the sewer example).
If it is planned to install a pipe heat exchanger in a one-story building, the supply channel will exit from underground into a heat-insulated box outside the building and enter the attic. In a two-story building, it is better to bring it into the building at the bottom of the first floor and install an internal vertical (distribution) channel, which will then be led into the attic space. When installing a bunker option in the basement of a building, the vertical distribution channel will exit the bunker directly into the room. It can also be mounted outside.
An example of calculating the consumption of materials for installing internal channels at home
Let's take as an example cottage with a calculated ventilated area of 60 m2, which will have approximately 100 m2 of total area and approximate dimensions of 8x12 m:
Pipe 250 mm: 2 x 12 + 3 + 20% = 32 m.
Pipe 150 mm: 3 x 12 + 20% = 43 m.
Fasteners: 32 + 43 / 0.7 = 107 pcs.
Elbows, revisions, couplings - take as 1 piece per 3 m: 32 + 43 / 3 = 55/3 = 20 pieces.
Grates: 8 pcs. (2 for each room).
Switches: 4 pcs.
Foam, sealant. Tube heat exchanger
In order not to complicate the calculations with mathematical calculations, we will provide data from tests already carried out in average form, or rather their results.
The basic principle that must be observed when creating a pipe system is that there must be at least one underground channel pipe per room. This will facilitate the operation of the fans due to atmospheric pressure. Now all that remains is to place required amount pipes in the underground part of the site. They can be laid separately or combined into a common channel (250 mm).
In this description, we propose to take into account not the maximum load, when all rooms are forcedly ventilated at the same time, but the average load, which will be supplied during regular periodic ventilation different rooms(as happens in real life). This means that there is no need to output a separate channel for each room. It is enough to connect 150 mm air ducts from each room to one common 250 mm channel. The number of common channels is taken at the rate of one channel per 60 m2.
Creating a recuperation field
Recommended layout of the underground part of the pipe heat exchanger: First you need to select the location of the pipes (recovery field). The greater the length of the laid pipes, the more effective the air cooling will be. It should be noted that after the work is completed, this area can be used for planting, landscaping or a children's playground. Under no circumstances should you plant trees on the recuperation field:
We excavate the soil to a freezing depth of plus 0.4 m.
We lay 250 mm pipes with a pitch of at least 700 mm along the axis.
We bring the air intakes to a height of 1 m. It is advisable that they be located in a shaded but well-ventilated place.
Using elbows and adapters, we combine them into a common 250 mm channel, which connects to the house ventilation system (see above).
Attention! In the underground part, use special soil sewer pipes with a thick wall. They do not need to be thermally insulated, but simply covered with soil and spilled with water. Only concreting is allowed if necessary.
Calculation of the amount of work and material consumption:
For a recuperation field we take an area measuring 15x6 m with an area of 90 m2.
The volume of soil in the pit at a freezing depth of 0.8 m will be: Vcat = (0.8 + 0.4) x 60 = 72 m3.
Volume of a trench 40 cm wide (10 m from the house): Vtr = 1.2 x 0.4 x 10 = 4.8 m3.
Total volume of excavation work: Vtotal = Vcat + Vtr = 72 + 4.8 = 77 m3.
Sections of 15 m: Notr = a / 0.7 = 6 / 0.7 = 9 pcs., where a is the width of the field.
Total pipe length: L = Notr x 15 + 10 = 9 x 15 + 10 = 145 linear. m.
The consumption of elbows, couplings, adapters is accepted as 2 pcs. x 15 m = 30 pcs.
Advice. The deeper the heat exchanger is installed, the more efficient its operation will be. More than one tier is allowed.
At a certain place, a pit measuring approximately 2x3x3 m is dug. A trench is made from the exit point of the common channel of the house ventilation system to the pit of the future tank, and a 250 mm pipe is laid into it to a depth of 140 cm, through which cooled air will be discharged from the bunker. Along the wall to which the trench approached, a vertical groove is laid to the bottom for a pipe with a diameter of 250 mm. Then the bottom is laid out with bricks or concreted. The bottom of the air tank must be at least 1 meter deeper than the soil freezing level.
Attention! After installing the bottom of the bunker, a 250 mm outlet pipe should be laid.
The beginning of the outlet pipe protrudes from the wall 1/3 of the distance to the opposite wall and is lined with brick protection. A protective grill is installed on the inlet opening.
Filling the tank
It is better to lay the walls out of brick or cast them from concrete (without slag!), since these materials conduct temperature better than others. Cinder block is not suitable due to its thermal insulation properties. The walls and bottom must be carefully waterproofed (roofing felt) on the outside and plastered on the inside to prevent the penetration of organic matter or moisture. The height of the walls is up to ground level minus 20 cm. An inlet hole is made at the top of any wall and air intake pipes are installed. To facilitate the operation of fans, we recommend installing 3 pcs.
After the solution has hardened, the bunker must be filled with large pebbles. Sizes from 200 to 450 mm in diameter. The stone must be clean of organic matter and washed.
The tank is covered with a “lid” made of solid plank flooring on wooden beams, covered waterproofing materials. Turf is laid on top. Then the outlet pipe is connected to the house ventilation system (to the common ventilation duct) and backfilling is performed.
Calculation of the volume of work and consumption of materials:
With an air tank size of 2x3 m and a depth of 3 m, the volume of soil (excavation and stone for filling) will be: V = 2x3x3 = 18 m3 + Vtr = 22.8 m3.
Volume brickwork: Vclad = Swall + Sbottom x 0.125 = ((2x3) x 2 + (3x3) x 2 + 2x3) x 0.065 = 36 x 0.065 = 2.34 m3.
Total pipe length (10 m from the house): L = (10 + 3) + 10% = 15 m.
Number of elbows - 6 pcs. Bunker heat exchanger
If there are unoccupied basements, they can also be used to construct a hopper (air or heat exchange tank) for a stone heat exchanger. Its action is based on the energy intensity of the stone - it gradually gains temperature environment and balances the flow of passing air. With absence free space in the basement, the bunker can be arranged in an area outside the house.
The cost of stone for filling a tank may vary depending on the region of construction.
As can be seen from the calculations, the final cost of air conditioning 1 m2 differs for both options. The main selection factor is the level of occurrence groundwater. If it is high, less than 3 m, then it will not be possible to build a bunker heat exchanger. The pipe one is suitable even with a groundwater level of 1.5 meters.
Installation of fans
The system presented here provides for the synchronous operation of two duct fans- supply and exhaust - installed in each air outlet of the room. This makes it possible to quickly deliver cool fresh air into the room and remove heated air. For effective ventilation, a fan power of 100 W each is sufficient. When choosing a fan, pay attention to the noise level when it operates.
Approximate cost of operation
If you ventilate each room three times during the day for 20 minutes, then we get 1 hour of operation of 8 0.1 kW fans. This is less than 1 kW/hour per day. Per month - 30 kW. At a price of 5 rubles/kW this will be 150 rubles/month.
The service life of recuperators and ventilation ducts at home is limited by the service life of the material. For underground elements - from 50 years, for internal ones - unlimited.
The system does not require maintenance (except for fans - once every 5 years).
Prospects
The described scheme can become the basis for more complex system conditioning. It is possible to gradually include additional elements - filters, heating and cooling elements, more powerful fans, blocks automatic control and others. The air mixture prepared underground has a stable temperature not only in summer, but also in winter, so it can also be used for heating.
05.05.2016 11:46
In this article we will not go into definitions and deep technical data. Let's talk on in simple language.
In short, the difference is as follows. The air conditioner circulates the air that fills the room, and the recuperator replaces the entire volume of air several times per hour.
And now more details.
Air conditioner– this is a device that heats (cools) the air to a predetermined comfortable temperature in the room. It can be equipped with such additional functions, such as ionization, dehumidification (humidification), adding air from outside. Unscrupulous sellers often write that the air conditioner has a built-in ventilation function. This is a deception, because ventilation is the removal of air from inside a room and replacing it with outside air. Only industrial precision models have this function, and not ordinary household ones.
Recuperator(in its simplest design) is a supply and exhaust ventilation unit that returns most heat back into the room. Heat recovery is performed by a heat exchanger, which has an efficiency of up to 90% and does not consume electricity at all. There are also models equipped with a climate control function, that is, they heat or cool the air to the desired temperature, just like an air conditioner. Due to the fact that the recuperator constantly supplies air from outside, there is no need to use a humidifier, dehumidifier, ionizer and other devices to control these parameters.
The most important difference between an air conditioner and a recuperator lies in the fact that the air conditioner pumps through itself only the air that is in the room, and the recuperator pumps out the air from the inside and supplies a fresh stream, thus completely renewing it 2 times an hour. Those who are familiar with duct air conditioners They may be indignant and say that this type of air conditioner also supplies fresh air. However, the whole point is that the duct delivers no more than 15% of fresh air (which the sellers, of course, do not talk about), and this cannot be compared with a 100% recuperator.
For clarity, the table below presents data with numbers.
Comparative characteristics recuperator and air conditioner.
| Characteristic | Recuperator | Air conditioner |
|
| Energy consumption without heating (cooling), W | |||
| Number of blocks, pcs. | |||
| Installation method | In-wall / utility room | Indoor and outdoor |
|
| Heating/cooling | (depending on model) | ||
| (soft heating) | (dries out the air) |
||
| (depending on model) | |||
| Removing air | from 2 times per hour, | ||
| Air supply from outside | from 2 times per hour, | (only in channels) |
|
| Operation at external temperatures is permitted | |||
| Heat exchanger | |||
| The need for ventilation | 3 times a day |
||
| Mold growth | eliminates completely | promotes |
|
| Allergic reactions in humans | increases |
||
| Heart rate, blood pressure | is stabilizing | violated |
|
| Need for filter cleaning | 1-2 times a year | monthly |
It is up to you to decide which equipment to choose: recuperator or air conditioner. But if anyone in your family suffers from allergic reactions respiratory system, I advise you to refuse to buy an air conditioner, because the bacteria that inevitably accumulate in it will cause even greater stress on the immune system.
The choice of the most suitable device is determined by the need, user preferences and characteristics of the premises being served. It is necessary to calculate the volume of the premises of an apartment or house, determine your own preferences and obtain at least minimal information regarding the operating features of a particular type of ventilation device.
First of all, you need to understand the device parameters, compare their capabilities with other devices and determine the degree of performance under given conditions. Let's consider the most important characteristics equipment and their significance for air exchange and microclimate of the home as a whole:
Performance
Productivity is the amount of air supplied by the device per unit of time, usually per hour. IN in this case It is impossible to indicate the performance of a fan installed in a breather, since the passage of flow through the filters significantly slows down its speed, correspondingly reducing performance.
It is necessary to consider exactly the amount of air directly entering the room. This is an important value that allows you to determine the capabilities of the device.
Expert opinion
Fedorov Maxim Olegovich
A person needs 30 m 3 /hour of fresh air. Based on the performance indicated in the passport, you can calculate how many people this device is designed for. It is necessary to take into account that all breathers have several operating modes and rarely operate at maximum. It is necessary to take the average value as the nominal speed.
Noise level
The operation of a fan is always accompanied by a certain sound produced by the engine and blades. In addition, which is also accompanied by noise. There is another source - the air duct facing the street serves as a conductor of external sounds.
All of them, in total, form a certain sound background that accompanies the operation of the device. Main source – electric motor, since the noise level changes mainly when switching speed modes.
The noise level is indicated in the passport. It is measured in decibels and ranges from 20-50 dB. How much this is, everyone judges in their own way, although at medium speed the noise is usually almost inaudible. Unlike air conditioners or fixed ventilation systems Breathers are almost silent.
Air heater
Supply of cold air from outside to winter time will quickly lower the room temperature to completely unacceptable values. If it is -30°C outside, a cold stream will immediately cause the formation of condensation, icing and other troubles.
Some breather models do not have a heater, which automatically limits their operation to warm regions only. For Russian conditions, only devices that include an air heater are suitable.
Usually a ceramic element is installed that does not burn oxygen. Its power is enough to raise the flow temperature to 50°, which is quite acceptable for heated rooms. It must be taken into account that the air is heated not to heat an apartment or house, but to maintain the existing temperature balance.
Filtration
Most devices have multi-stage filtration of incoming air. There are models in which the flow passes through 4 filters in series.
A total of 3 types of filters are used:
-
base(fawn). Stops particles of dust, wool, poplar fluff, pollen and other fairly large elements that pollute the air flow
-
HEPA filter. Consists of fibrous nonwoven fabric, placed in a special casing in an accordion. Capable of stopping the smallest micron-sized particles. A feature of such filters is that the cleaning efficiency increases with increasing filter contamination, when the stopped particles themselves begin to work as filter elements
-
carbon filter. Capable of stopping paint, solvent odors, car exhaust fumes, etc.
The ability of filters to produce high-quality cleaning is appreciated by people who are sensitive to odors, suffer from lung diseases or have allergies. Thanks to thorough filtration, you can have clean air without opening windows and preventing odors, allergens and dust from entering your apartment.
Control system
The main control of ventilation devices is carried out from the remote control remote control. Most breathers do not have any other customization options, which some users consider a noticeable drawback. In addition, there are models that can be programmed some time in advance.
The most modern models can be controlled from a smartphone, for which you need to install the appropriate application. This method allows you to change the operating mode while being at another point globe. Communication with the device is carried out via WiFi, although some users in reviews complain about poor communication with servers.
Another option for controlling breathers is connection to the system smart home . The device, built into a common network, receives signals or commands from temperature or CO 2 sensors, changing the air supply mode for high-quality and prompt adjustment of certain microclimate parameters.
Advantages and disadvantages of a breather over climate systems
Climate systems, unlike ventilation devices, do not provide air exchange. The specificity of their actions is to create the desired temperature of the air circulating indoors without updating its volume.
The room may have a comfortable, cool temperature and clean air, but its composition may well be far from sanitary standards- the carbon dioxide content is exceeded, as a result of which people’s well-being will worsen, drowsiness, lethargy, and a feeling of weakness will appear.
This is what makes them different ventilation units from climatic - ensuring the arrival of fresh inflow, normalizing the composition of the air and displacing emerging harmful substances. When the user is faced with the question of how to choose the right breather, he should first find out what it is.
What is a breather and how does it work?
Let's look at what a breather is, which one to choose, the pros and cons, and the design features of the device.
A breather is a household ventilation device that provides a forced supply of fresh air to living spaces. It consists of a body with structural elements, an air duct passing through a hole specially made in the wall, and an external decorative cap (not all models are equipped with it; some samples have to be decorated from the outside using accessible methods).
Outside air enters the intake pipe and passes into the housing. There it is sequentially passed through a filter system and a heater, after which it enters the room through an outlet grille, usually located on the top or sides of the housing.
pros
The main advantage of the breather is high-quality cleaning of incoming air. It allows you to ventilate rooms without the need to open windows, which is very much appreciated by allergy sufferers or people sensitive to odors. In addition, breathers allow you to normalize work that cannot work with modern plastic windows, not allowing outside air to pass through.
Job natural exhaust designed to allow a certain amount of fresh air to enter through leaks wooden windows or doors. Modern window and door blocks They have a high-quality seal that hermetically seals all cracks. There is no pressure drop required for natural exhaust to operate, so normal air exchange becomes impossible.
Breathers supply a supply air flow, which restarts the operation of the exhaust ducts, organizing normal air exchange in the rooms.
Minuses
The disadvantages of the device include the need make a hole in external wall . If you need to change the location of the device, the hole will have to be made in a different place, and the existing one will have to be sealed. In addition, this requires the use of special equipment, and the work itself must be performed by an experienced specialist.
Disadvantages of a domestic ventilator
Ventilators are usually called wall or window valves. They perform almost the same functions as a breather or recuperator, but have a smaller set of capabilities or functionality.
The ventilators do not need to be connected to power supply networks, representing ordinary openings for fresh air, with an adjustable passage size and the presence of basic dust filters.
The main disadvantage of such devices is the lack of air heating, which significantly changes the microclimate and reduces the level of comfort for people. In winter, this disadvantage manifests itself especially noticeably, condensation forms, and icing of devices is observed.
How to choose between air conditioner and breather
The choice between an air conditioner or a breather is fundamental, since, despite their external similarity, the operation of these devices is fundamentally different from each other.
Expert opinion
Heating and ventilation engineer RSV
Fedorov Maxim Olegovich
Air conditioners recirculate internal air, cooling (or heating) it in accordance with the specified operating mode. Breathers supply outside air into the room, providing a medical standard for the composition of indoor air. Thus, air conditioners change the temperature, and breathers provide fresh ventilation.
Choosing the most suitable type devices, you need to decide what functions are needed. If it is important to provide quality air composition without dust, allergens or bad odors, then you need to choose a breather. In cases where It is important to ensure coolness in a hot room, purchase an air conditioner.
What is better - a recuperator or a breather?
If a dilemma arises - a recuperator or a breather, what to choose and why, first of all you should clarify for yourself the purpose of these devices. Breezers have already been discussed above.
Recuperators are household ventilation devices, providing heating of fresh supply air using the thermal energy of the exhaust exhaust flow. The principle of operation of such installations is to pass air flows through a heat exchanger. Passing through its plates, warm exhaust air heats the plates, which transfer energy to the cold supply flow, as a result of which prepared and purified fresh air enters the room.
Manufacturers position recuperators as the optimal solution for the home, allowing you to save on heating. In practice, things are more complicated, since the range permissible temperatures limited to -20°C, and for some models -15°C. The record holder is the Dutch recuperator Brink, the minimum temperature for which is +5°C. For the conditions of most regions of Russia, this means that for most of the winter the device will either work at the limit or be completely idle.
In addition, judging by user reviews, in apartment conditions V apartment buildings the recuperator is useless. It is not able to cope with the pressure of the ventilation ducts, so it works without creating any useful effect. Therefore, the user has no choice but to choose a breather with the most successful technical characteristics and obtain high-quality air exchange with the specified parameters.
Inexpensive models
Specifics of household air handling units is such that when purchasing an inexpensive breather, the user most often receives an ineffective device that is not able to fully solve existing problems.
Prices
The rating of breathers, characterized by high efficiency indicators and a successful set of functions, shows prices from 25,000 ₽ and higher. We are talking about breathers of the Tion family. Other manufacturers, releasing devices with lower performance indicators, set prices from 30-35,000 ₽
Useful video
An energy-efficient ventilation system in the cold season is enough actual question. Minimizing heat loss, which is constantly emitted from the room, will not only reduce the amount of utility bills, but also reduce the load on the room heating device.
Plate recuperators can help with this - devices that return part of the thermal energy from the exhaust air.
Heating the room in the cold season using a modern air conditioner allows you to maintain a comfortable microclimate in the room. The price you pay for comfort is electricity bills, the size of which can vary significantly depending on the outside air temperature.
With relatively low costs it is possible to create an energy efficient ventilation system, significantly reducing electricity costs.
A plate recuperator will allow you to implement this, and it does not matter whether it is purchased in a store or made by yourself. This device is built into the supply and exhaust ventilation ducts, helping to reduce “street heating” to a minimum.
Considering that on some days the difference in indoor and outdoor temperatures can reach fifty degrees Celsius, the importance of eliminating the mentioned effect becomes clear. Moreover, the schemes and ready-made devices A huge amount is offered for this.
Air recovery principle
To understand the advantages and benefits of using recuperative heat exchangers, you first need to understand the very essence of their work. IN literal translation From Latin, recovery is called “return of used, spent.”
It is the energy return effect that is used in climate control devices of this design. Air flows passing through the unit exchange thermal energy with each other, allowing the air conditioner to subsequently maintain a comfortable temperature, spending less energy. On particularly cold days, this allows you to significantly save on heating the room.
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