Previously, the ventilation of the apartment was provided naturally through the exhaust ducts laid in the ventilation shafts. Exhaust ventilation was organized from the kitchen and bathroom. The air flow was achieved due to leaks in the windows and doorways. However, wooden windows began to be replaced by plastic, interior and entrance doors began to be equipped with seals. If the ventilation shaft in the house is not properly maintained, and windows and doors do not allow fresh air to pass through, then this can lead to complete stagnation of air.
In such situations, apartment ventilation systems are becoming increasingly important. It would seem, why do you need ventilation in the apartment, if you can open the window and ventilate? But this method has big drawbacks associated with a large level of street noise and a change temperature regime in the room: the temperature drops in winter and rises in summer. And will the air coming from the street always be clean?
In addition, ventilation systems designed during the construction of a house can also be a source of air pollution. As a rule, these mines are very rarely cleaned. Meanwhile, the air passing through these channels carries dust and dirt accumulated there into the premises. If you constantly breathe such air, then you are guaranteed a decrease in efficiency and immunity, poor sleep and headaches.
A properly selected ventilation system solves all these problems:
Will purify the air
Regulates the temperature of the incoming air
Get rid of street noise
Video of the design and installation of a ventilation system at one of the facilities
Ventilation systems for an apartment
1. Duct or overhead fans
To implement this method, you must first clean the ventilation ducts by contacting the local management company. Air flow will be achieved by ventilating the premises through the opening of windows. You can consider installing a so-called "ventilator", but it will not provide a full flow of air.
Pros: ease of installation and operation, small overall dimensions.
Cons: violation of the temperature regime in the room, high level noise.
More effective solution will use a small air handling unit street type. It is a device mounted with outside houses in a heat-insulated and moisture-proof housing. Such installations include: a filter, a fan, a heater and a compartment for automation devices.
Pros: ease of installation, low noise level, full air exchange.
A qualitatively much higher level of ventilation in the apartment is achieved through the use of a supply and exhaust unit, which is installed indoors. The principle of its operation is as follows: air is taken from the street, it is cleaned, heated and then supplied to the entire apartment through air ducts. Air heating is performed by electric (TEN) or water heaters. Built-in automation determines the required heating temperature. To save electricity consumption, such systems are often equipped with heat recuperators, which can reduce electricity costs by up to 40%.
When implementing such a solution, an integrated approach is required. That is, air handling unit should work in conjunction with ducted air conditioners and humidifiers to create maximum comfortable stay in the apartment. During the hot season, the air will be additionally cooled, and in winter period- moisturize. Before installing these systems, it is necessary to pre-calculate the air exchange in the room, optimal selection power of all devices, determination of the required section of air ducts. All this is taken into account in the project, according to which the specification and the exact layout of air ducts and equipment are issued.
Cons: this solution cannot be implemented in rooms whose height does not allow allocating 20 to 40 cm under the ceiling for the installation of air ducts and equipment.
4. Channel type air conditioners
Another way to organize ventilation in an apartment is to use duct-type air conditioners. This equipment can work both as a supply and exhaust ventilation system and as a cooling system. Air conditioners can use fresh air from the street, but in small quantities, as this is limited by the capacity of the compressor and their filter system, which in this case quickly become dirty. However, this method is often used because it does not require complex installation and an additional air handling unit.
If the task does not concern the entire apartment as a whole, but only ventilation, air conditioning and humidification in a single room, then the best solution for all these tasks is to install wall split system with a mixture of fresh air.
This system has a number undeniable advantages. It provides a flow of fresh air with pre-cleaning up to 36 m 3 / h, humidifies and conditions it.
In fact, you get a full-fledged climate complex in the form indoor unit wall split system.
Cons: humidification works up to a temperature level of at least -20 ° C, limited fresh air supply, high cost of the system.
Is there any practical benefit from installing supply ventilation in an apartment with air filtration?
Let's discuss...
An apartment without a ventilation system does not provide proper comfort in some cases. In large cities, unfortunately, the situation with air pollution is very sad and the amount of harmful impurities in the atmosphere over the metropolis is much higher than the norm.
It doesn't really matter if you're on the street or at home. Modern apartments are something like small chemical laboratories that produce poisonous substances all the time. Almost all objects around you can be sources of pollution. That is why it is so important to continuously update the air in the apartment with fresh purified air from the street. The necessary air exchange in the apartment will help to provide a supply ventilation unit or ventilator. These devices will create correct system ventilation in your apartment and supply required amount air.
If the ventilation in the apartment does not work well
Studies have shown that toxic substances are released from synthetic materials much more intensely when exposed to solar radiation. If the ventilation of the apartment does not work well, and there is no way to often ventilate the room, then the concentration of harmful gases can reach a critical level. All building construction and the soil is continuously excreted harmful substances, including the extremely harmful radon, a colorless and odorless radioactive gas that, in certain doses, is very dangerous to humans.
If the humidity level in the apartment is too high, then the supply ventilation will stabilize it.
Properly selected and installed supply ventilation in apartment, gives people comfort and health, good mood and performance. Unfortunately, many of us believe that to achieve all these effects, it is enough to put on a regular air conditioner. However, air exchange in a house or in a separate room is a complex process that requires the installation of special equipment. To avoid confusion in concepts, you need to remember the following:
Air conditioner or split system, cools the air that is in the room. The supply of fresh air from the street is not included in its function, this task falls on a wall ventilator or supply ventilation unit. But the most important thing is that all devices must create the correct ventilation system for the apartment. The air conditioner can provide the desired coolness and comfort, and the forced ventilation of the apartment (especially if plastic windows) is needed to maintain required level oxygen.
air cleaner traps harmful impurities and purifies the air already circulating inside the apartment. Air handling units clean the air flow coming from the street, and therefore, with their help, you can achieve lower concentrations of toxic substances in the air that you and your children breathe.
Ionizer can improve the air quality in your apartment, but cannot provide oxygen. It is recommended to install an ionizer complete with a supply unit. These devices work great in pairs: supply system supplies clean fresh air into the room, and the ionizer improves the quality of this air.
Supply fan put for ventilation rooms or apartments, but its functionality is limited to this. In the best case - it can clean the air of dust, but no more. Unlike a fan, a supply unit can do a lot: heat the air to the required temperature, purify it from toxic impurities, and supply it to the room completely silently.
How to make the atmosphere of the apartment comfortable
And so, what affects our well-being in the apartment? Where does the feeling of discomfort come from and why, being in cozy room do we get that feeling? Why, sitting in a room with an open window or window, do we still have a feeling of lack of air, suffocation?
The concept of indoor comfort is rather conditional, but in our case, it consists of several components.
One of these components is clean fresh air, the continuous supply of which will help ensure supply ventilation. Inexpensive ventilation in the apartment, which has a minimum noise level and which will not only purify the fresh air supplied from the street, but also maintain it optimum temperature. In the catalog of "Climate Control Engineering" you can find a wide selection of various compact air handling units, ventilators, energy-saving systems of supply and exhaust ventilation of the apartment, equipped with high-quality filters, carbon and photocatalytic (FKO filters), which allow you to get rid of not only fine dust, but also odors, harmful heavy compounds and automobile exhausts. These supply devices can be installed both on each separate room and on the whole apartment as a whole, and thanks to professional tool and the high qualification of our installation service, the installation of these air handling units in an apartment can be carried out both in the process of apartment renovation, and in a residential, completely renovated clean room.
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Why we do not install supply valves such as KIV, Aereko and others
There are many reasons for this, but the most important is that with passive supply valves, the ventilation process will be carried out only in the autumn-winter period. That is, in the summer, air exchange will still be absent. This is explained quite simply. Natural exhaust ventilation will work as long as there is a temperature difference between the indoor and outdoor air. By creating a small vacuum in the apartment, it contributes to the flow of air from the street through the valves.
Ventilation will be the better, the greater this temperature difference. Accordingly, the smaller the difference, the weaker the hood works. As soon as the air temperature in the room is equal to the air temperature outside, the air exchange process will stop completely. There will be dampness in the bathroom, again there will be a state of discomfort, suffocation, and, of course, again the hand will reach out to closed window. The question arises, why give money and install supply valves, if in the summer you still have to open windows?
Of course, if you live in nature and there is silence outside the window, clean air, neighbors do not smoke, then you do not need ventilators and air handling units and you can save money and install valves. In all other cases, for normal year-round ventilation in the room, it is necessary to install mechanical ventilators. Only a mechanical ventilator, forcibly supplying air, creates a slight overpressure in the room, and thereby “squeezes” air into the exhaust shafts located in the kitchen, bathroom and bathroom, normalizing ventilation and air exchange. Since all supply units and ventilators are designed for continuous, round-the-clock operation, the process of air exchange in the room occurs all year round, including in summer.
Air recuperators for ventilation in the apartment
Perhaps everyone who thought about installing a ventilation system for their apartment was interested in: how much would it cost and the cost of its installation. But probably no less interest Ask, how much will it cost to operate this system year-round daily. Of course, operating costs will be minimal if you install ventilators that do not heat the air in winter, while consuming 30-50 W/h all year round. Let's try, using the example of a non-heating ventilator Aeropak, to calculate how much its round-the-clock operation will cost.
And so, we found out how much round-the-clock operation will cost us. But for proper ventilation rooms, when the icy influx of fresh air does not chill the room in winter, ventilators and supply ventilation with air heating are used. Such devices allow you to ventilate the room more comfortably, but the power of these ventilators is much higher than that of non-heated ventilators, and therefore the operating costs are also higher. If we compare the energy consumption of such devices in summer period, as well as in spring and autumn, with non-heated ventilators, it will be approximately the same, because in summer the air does not need to be heated, and electricity is consumed only for the operation of the ventilator fan. Another thing is when winter comes and the air temperature outside drops to negative values. This is where the main expenses for heating the air begin.
The cost of operating the Selenga FKO air handling unit
As a result of the calculations made, we now imagine how much it will cost to operate a heated air handling unit. Of course, the ventilation in the apartment can be turned on and off from time to time, but as practice shows, we spend more than 10 hours a day at home, so a lot, these shutdowns cannot be saved. What then to do if you don’t want to open the windows, but somehow you need to ventilate the rooms? The way out of this situation may be installation. What is it, how does it work and why is it needed?
Who needs ventilation
Many people think that the installation of fresh air ventilation is an unnecessary luxury. If earlier for the normal well-being of people it was enough to observe the volume of air replacement of the order of 30 m 3 per hour, then in the current state air environment in megacities and large cities, a person needs at least 60 m 3 of fresh air per hour to obtain the required amount of oxygen. Such a volume of air replacement can be achieved only by installing a forced supply and exhaust ventilation system in the apartment. And even when the apartments most time there are no people, it is necessary to constantly produce the so-called background ventilation for ventilation in the apartment and the removal of toxic substances that constantly emit synthetic materials and building structures.
The group of companies "Climate Control" has been engaged for many years. Our experts are well aware of the installation technology of air handling units and will help you solve all the problems associated with the ventilation process in your home.
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D For normal operation of multi-storey buildings, a single air exchange of rooms for an hour is sufficient. For this in standard projects ventilation ducts are mandatory natural extract. However, the default air flow should be provided by window slits, vents, and vapor-permeable wall materials. For many property owners, forced ventilation in an apartment with filtration becomes a real necessity when installing PVC window units with double-glazed windows, using vapor-proof wall coverings or films under them.
Organization of ventilation with ventilation ducts
Requirements, principle of operation
It becomes necessary to increase the comfort of living supply ventilation in the apartment with filtration in the absence overpressure indoor air. Ventilation ducts remain unused, because they cannot create traction without fresh air from outside. The classic is the scheme of natural ventilation:
For the heat exchanger, it is enough to make a hole in the wall, align its edges, install a special sleeve, and fix the equipment.
The hole diameter is 22 cm, so you will need diamond drilling or drilling small holes along the contour with knocking out the cork with a hammer. Installation is possible in any weather / season, takes 30 - 90 minutes, depending on the wall material.
Inlet valve in a plastic window
For the convenience of owners of modern PVC window blocks, the inlet valve is supplied by the manufacturer as a single set with three seals.
Device supply valve for cutting into a wall
Article
The main purpose of ventilation is to update the accumulated air in the room. Ventilation is exhaust, providing air removal, supply - supplying fresh oxygen from the street, and supply and exhaust, which ensures the removal and supply of fresh oxygen. As a rule, this is arranged in the kitchen, bathroom and in places c large quantity people (restaurants, cafes), etc. It should be noted that the arrangement of this type of ventilation is not so easy. Such a system consists of a large number of parts: air ducts, a cooler, a heater, filters, a noise absorber, various sensors (air temperature, carbon dioxide level in the room, etc.). Installing supply and exhaust ventilation in an apartment is a rather complicated and multi-stage work, but with a certain skill and desire, installation can be done by hand.
Why is ventilation necessary?
For an apartment, it is designed to ensure movement in two directions - the supply of fresh and exhaust exhaust.
In apartments, this role is played by open vents and windows, which are assisted to some extent by the existing exhaust ducts of the kitchen and bathroom, which provide local ventilation. However, for large apartments such ventilation may not be sufficient.
The consequences of insufficient air exchange for a person can be the following:
- lack of oxygen can lead to disruption of the cardiovascular and central nervous system;
- exacerbated respiratory diseases;
- there is a decrease in performance;
- humidity rises in the room;
- fungus and other pathogens develop in the air.
Signs of insufficient ventilation of the room
- In summer, the humidity rises, and in winter it decreases relative to the natural background.
- In the kitchen, a greasy coating forms on the walls.
- Glass fogging occurs.
- A fungus appears on the walls in the kitchen and bathroom.
When these signs appear, you should think about organizing a forced air supply in the apartment. exhaust system, as lack of ventilation can be harmful to health.
Ventilation calculation
Supply and exhaust ventilation systems for an apartment consist of 2 parts:
- A supply ventilation system that ensures the delivery of fresh air from the street, its heating, cleaning, and, if necessary, cooling.
- Exhaust system, which is popularly called simply "hood". This device ensures the outflow of polluted air from the room.
The exhaust ventilation device is quite simple. It consists of an air duct and a mechanism that provides air outflow. Installation of filters, coolers or heaters is not required here. The only thing you need is a noise absorber, because if the hood is powerful, noise will be created from its operation.
The calculation of exhaust ventilation is as follows.
1. The volume of the room is calculated in a cube. m.
2. The resulting indicator is multiplied by 12.
Exhaust ventilation calculation example:
- The kitchen area is 2x3 m, the ceiling height is 2.5 m. We calculate the volume this room. AT this case it will be equal to 15 cubic meters. m.
- We calculate the power of the hood. It is equal to 180 cubic meters. m / h (15x12).
To improve the performance of the hood, it is recommended to open a window or window. To make the supply and exhaust ventilation for the apartment more economical, complex options are used. In winter, the exhaust air warms the incoming air. To do this, use a special unit - a recuperator. It is a kind of heat exchanger, where the air that has arrived from the street is warmed up, without mixing with the air that is discharged to the street.
Ventilation design
In an apartment, it begins with the design. Before carrying out the actual installation on paper, it is necessary to calculate:
- the number of meters of pipe that will be required for the outflow of air;
- how much air is needed for the flow of air ducts;
- determine the location of all nodes and think through all the details of the system;
- consider where the air intakes and grilles will be installed.
At this stage, it is necessary to take into account not only the location, but also the dimensions of the air ducts (in particular, the diameter of the pipes). It should be remembered that the larger the diameter, the more air flow can be provided. But modern apartments rarely have high ceilings, so install wide pipes most likely won't work. The disadvantage of narrow air ducts is the presence of high noise, therefore, when calculating the supply ventilation, as a rule, a compromise is sought between the size of the pipes and noise indicators.
Features of installation, calculation
Do-it-yourself supply and exhaust ventilation for an apartment is installed during execution finishing works, after completing all the "dirty" construction works(plasters, putties), but before installing the ceiling, since the main part of the nodes ventilation system hiding right there. As a rule, everyone is familiar with the principle of ventilation, but not everyone knows which components and assemblies should be installed. Mounting options for air handling units are diverse: apartment ventilation supply and exhaust system from the floor, balcony, loggia, under the ceiling, as well as on outer wall building.
The layout of the nodes of this system consists of:
- Air intake valve.
- An air filter that purifies the intake air.
- Heater (heater). This unit usually turns on at low temperatures, when the outgoing air flow does not have time to warm up the incoming one.
- Recuperator, which is a unit in which the incoming flow is heated. Install it to save resources.
- A cooling unit or air conditioner that is installed before leaving the air supply system. It is necessary to minimize the path through the cooled air ducts.
- If necessary, a fan or humidifier is installed along the flow path.
- At very high power supply ventilation and install a sound absorber.
In order for the supply and exhaust ventilation for the apartment to work as efficiently and economically as possible, an automatic control unit is installed that turns on / off various components (for example, it turns off the heating unit in summer and turns on air cooling, and in winter, on the contrary, the air is heated).
How to determine the power and efficiency of ventilation?
To install the ventilation system, you should calculate the volume of supplied and exhausted air.
- In residential premises, regardless of the number of people staying there, on average, 3 or more cubic meters should be supplied in 60 minutes. meters of fresh air per 1 sq. area meter.
- In places of public use, the oxygen supply should be 60 cubic meters. m./hour per person staying permanently indoors and approximately 20 cubic meters. m/hour for each temporary visitor.
The norms for the frequency of air exchange for 1 hour in rooms for various purposes are given in SNiP 2.08.01-89 * "Residential buildings".
Checking the efficiency of ventilation
To make sure that the supply and exhaust ventilation for the apartment is properly equipped, you need to check the operation of the hood. This is done very simply: a sheet of paper or a lit match is brought to the table. If the edge of the paper moves towards the grate, or if the flame is directed towards ventilation duct, the system is working. If this does not happen, the channel is clogged. The reason for this may be cobwebs or leaves that have fallen into the duct. In this case, it is necessary to clean the channel.
Also, the air outlet in the apartment may not work if the neighbors blocked the channel during the repair. In this case, you should call a specialist to identify this place and resume traction.
Organization of proper supply ventilation in the apartment
Installing plastic windows can cause poor ventilation of the apartment, condensation. Supply and exhaust will help to find a way out of the situation. The influx of fresh air can be increased by installing special valves on the balcony, loggia. Exhaust air will be removed through ventilation grates in the bathroom, in the kitchen. However, more effective method- installation of a decentralized exhaust structure on the facade wall inside the apartment. Air exchange occurs through air ducts in the wall. The heat recuperator allows you to reduce the cost of heating the apartment by more than 70%, and the filter purifies the air. The unit is quite simple, you can install it without much difficulty with your own hands.
Benefits of Heat Recovery Ventilation
The supply and exhaust system, as you know, has a low efficiency. To increase it, a heat recuperator is installed - a unit that provides energy saving in the room.
Supply and exhaust ventilation for an apartment with recuperation works according to the following principle: the outgoing air is not immediately removed to the outside, but enters a special cassette, in which it heats the clean air coming from the street to room temperature.
The advantage of this system is that heated comfortable air enters the room, which does not require additional energy to heat.
System Maintenance
This process can be divided into 3 stages:
- Maintenance of exhaust ducts (periodic cleaning with replacement of filter cassettes).
- Maintenance of pressure equipment (maintenance of fans).
- Care additional equipment- heaters, recuperators, air conditioners, etc.
Dust and dirt gradually accumulate in apartments, which negatively affect human health. If double-glazed windows are installed in them, then the room turns into a container. The problem is neutralized by wet cleaning, ventilation (designed during the construction of the entire residential building).
It is unlikely that ventilation shafts are cleaned frequently. That is why they often serve as the very cause of apartment pollution. If you constantly inhale this air, then there is a decrease in efficiency and immunity, deterioration of sleep, a migraine appears.
When a person is constantly in his apartment, experiencing oxygen starvation, he is drawn to fresh air. All this happens in a crowded room with a large accumulation of carbon dioxide (CO2), which makes the air heavy. The culprits are oxygen pollution due to the high flow of heat, moisture and dust. Usually in this case, airing is carried out, but this has a positive effect, only temporarily. And in the winter season, this does not work. When the house is next to the roadway. Where dust, dirt, gases, and other harmful odors accumulate. However, there is a way out, it is necessary to install ventilation in the building.
In basic situations, ventilation is required for apartments where euro windows are located. With their help, people want to protect themselves from harmful effects environment. Just like metal structures, they create sealing as the main quality criterion in houses. No dust, noise, exhaust fumes, but also no fresh air.
To ensure a good microclimate helps clean ventilation installed in the apartment. This eliminates the need for constant ventilation by opening ventilation holes, to protect the premises from drafts and noise from the street. In addition, mold, insects, vital smells disappear in the apartment. And there is always oxygen in the house.
The supply and exhaust ventilation in the building produces air movement in 2 zones - the arrival of fresh air and the removal of polluted air flow. Usually this function is performed regular windows and vents with the participation of exhaust channels, they are located in the kitchen and bathroom area, conducting natural ventilation. This works well for small living spaces. This is not enough for large buildings.
As a result, a person has a number of consequences due to insufficient air exchange:
- lack of oxygen often causes a malfunction in the cardiovascular and central nervous systems;
- often there are disorders in the respiratory system and colds, efficiency decreases;
- the room is filled with moist air;
- development of fungi and microbes.
How to determine the lack of ventilation in the premises:
- In summer, the humidity in the premises rises, and in winter it decreases.
- Grease stains on kitchen walls.
- Windows often sweat.
- In damp rooms in the kitchen, bathroom, traces of fungus are formed on the walls.
If at least one sign of the above is present in the apartment, the installation of a supply and exhaust system is required, due to its insufficiency, harm to health is caused.
Ventilation design
Before starting the installation of supply and exhaust ventilation in a building, it is worthwhile at the beginning to draw up a draft design of the ventilation system. Reproduce all calculations on paper:
- pipe length dimensions for air outlet;
- set of air ducts for air exchange;
- choose the location of the installation system;
- choose a place for the location of air - a fence and a grate.
In addition to everything, a place is chosen - the location and dimensions of the air ducts (in particular, the diameter of the pipes). Wide diameter providing more airflow for better performance. But unfortunately not all apartments have high ceilings, which does not allow the installation of wide pipes. In addition, there is a drawback in the design of narrow air ducts, this is the creation of noise during the operation of the fans.
How a ventilation device works
The supply and exhaust ventilation unit has a simple design. Air ducts and fans play a major role in its work. Other details are involved as a reunion and fastening of the main elements. They provide Good work all system functions. When using a sensor, a power regulator and a filter, the basic properties of ventilation are improved with subsequent automation.
Making an entrance and an exit of the air which is in the general area or in versatile rooms. They fit well with large buildings and apartments.
The installation scheme for the installation of supply and exhaust ventilation is divided into 2 stages:
- for small apartments connect a block that has 2 fans in the upper ceiling;
- for cottages, installation is carried out using an air duct in the ceiling area throughout the apartment, in all rooms where the connection is made to all points with different power units.
What types of systems are involved in air circulation
Basically there are three types of ventilation:
- modular type;
- monoblock type;
- heat recuperators.
Each of them carry out one and the same task.
- Bringing in and out of air together.
- Balance the normal microclimate in the building.
According to its structure, it refers to a mechanical system in which air exchanges occur with the help of a special unit. Each of them has two fans:
- Supply
- Exhaust.
Norms and indicators of ventilation, as well as air conditioning in the apartment
In each residential building or apartment, a small air exchange is required, consisting of a calculation of 3 m3 / h per 1 m2 of area - SP 54.13330.2011 residential multi-apartment buildings.
Permissible extraction rate for utility rooms:
- Kitchen with electric stove- 60 m3/h.
- Kitchen with gas - stove - 90 m3/h.
- Bathroom, WC - 25 m3/h.
- Combined bathroom - 50 m3/h.
- Storage room, wardrobe - 25 m3/h.
Regulatory degree of temperature:
- AT summer season- 22-25 C.
- In the cold season - 20-22 C.
Mounting Features
The installation of a supply and exhaust ventilation system in buildings is carried out during repair and construction work associated with dirty procedures in the form of plastering, puttying, especially the ceiling part, where the main blocks of ventilation units are located. However, many do not have exact instructions on how to arrange them. Mounting options have several directions of supply installations: they produce ventilation outside the building, under the ceiling, from the floor. The design of the device itself consists of:
- Air intake valve.
- Purification filter.
- Heating device.
- A device that is activated when the lower temperature scale is reached, when the air at the exit does not have time to heat up with the incoming flow.
- A device consisting of a block inside which the incoming flow is heated. Designed to save, using a variety of energy efficient use of less consumption.
- The block of the cooling controlling an output and an input of an air stream.
- If the flow is obstructed, a fan and a humidifier are specially installed for the passage of air.
- If the maximum level and degree of sound is created during the supply ventilation, a noise absorber is installed.
To provide quality work supply and exhaust ventilation, they specially build in an auto - on / off switch control unit - of different nodes (in the summer they turn off the heating option and turn on the air cooling, and in the winter season, vice versa).
At the end of all installation activities, it is checked for the quality operation of the hood in this way, any paper sheet or a lit match is brought to the ventilation grate. By swaying the paper and directing the flame towards the grate and into the ventilation, the appliance works well. If not, then the channel is clogged and needs to be cleaned. If the system still does not work, it is worth using the help of a special team to identify the causes and correct them.
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