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If you are tired of constantly ventilating the kitchen, and the issue of air purification remains unresolved, then it’s time to purchase a powerful hood the desired model. Before purchasing, you need to make sure that you have taken into account all the nuances - from functionality to decorative features. And to do this, you need to become thoroughly familiar with the characteristic qualities of the most common commercially available models, and also calculate their power.

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Among the huge range of kitchen hoods, you can choose models of all sizes and shapes. Many buyers first choose Beautiful design or a famous brand. But the appearance of these devices is much less important than their technical specifications– power and volume of air pumped per unit time.

An incorrectly selected hood for a given room will not be able to effectively clean the air in it. Its performance indicator, measured in m 3 / h, affects how much polluted air it can pass within an hour. Using special calculations using a simplified formula, you can independently select the most suitable exhaust hood for your kitchen. Only a competent engineer can make a more accurate calculation.

What is the difference between a hood and ventilation?

The ventilation system is a network of channels built into the walls with an exit to the outside of the building for exhaust air exhaust from the room. The flow of fresh air occurs through the doors and window openings in a natural way.

This air exchange system sanitary standards must be installed in all residential premises. But it is not very effective and, even more so, is not able to localize and remove odors, fumes, soot and other “delights” of everyday life. To prevent them, install forced ventilation– hood. It collects all the vapors from the hob and directs them through the air duct to the ventilation system.

Exhaust device

According to the principle of operation, they are all similar to a vacuum cleaner, but with different functions. Modern exhaust devices are different designs, depending on the purpose - some only remove polluted air, while others filter it and return it back already purified. According to the cleaning method, they are divided into flow-through, recirculation and combined, which combine both options.

• Flow hoods equipped with metal or plastic pipes(round, square, corrugated) for connection to the ventilation system, which can be rigid or flexible. The lower parts of the device consist of filters () that trap soot and grease. They disguise themselves as decorative panels. Fans and special motors are located inside. Behind them there is an air duct connected to ventilation.
• Recirculating They work autonomously, without connection to ventilation, and therefore do not have pipes, which is why they look more aesthetically pleasing. Inside their cases, after the fans, there are replaceable, very thin carbon filters. For rough cleaning, the filters are made of durable aluminum and can be easily washed detergents. Externally, the principle of the housing structure is the same as that of flow-through ones.

The exhaust system operates from electrical network. Everything is very simple - plug it in, press the button with the selected mode (indicated by numbers 1-3), the engine picks up speed. The most convenient hoods to connect are those with touch screens or remote control(using remote control or voice commands).

Types of exhaust systems according to shape and placement methods

Depending on the structural features of the body, there are several varieties:

• Flat– the most compact, without additional installations. Suitable for small spaces. But they have a short service life and must be replaced periodically. Among the flat ones there is a variety of inclined ones, located at an angle to the hob and having small dimensions.
• Dome– powerful and functional, they clean large rooms well. They are quite large and have the shape of hemispheres or pyramids.
• Also available cylindrical(adjustable in height), square, cone-shaped, round and other non-standard forms.
• Built-in the models differ from the previous ones in the ability to camouflage them in furniture, ceilings, or niches in the walls.

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Depending on the placement, there are hoods:

• hanging– mounted to the wall or ceiling in any area of ​​the kitchen;
• island– attached to the ceiling in the center of the room;
• corner– installed on two adjacent walls for more rational use space.

Requirements for exhaust devices and their installation in the kitchen

To ensure effective and safe operation These devices must follow several installation rules:

• The dimensions of the intake hole must be larger than the area of ​​the cooking surface.
• The distance from the surface of the stove to the hood must be at least 70-80 cm to avoid overheating.
• Its power must be such as to provide complete replacement air at least 10 times per hour.
• If the kitchen does not have access to a special ventilation shaft, then it is better not to connect it to a regular one, so as not to disrupt its operation, or even better, install a recirculation model.

How to calculate the power and performance of a kitchen hood depending on the area of ​​the room

The higher the exhaust power, the faster the air will be purified. The required productivity for a given room can be found in the table, where the calculations are based on the area of ​​the kitchen and its height. The lowest productivity is for cheap models, approximately 200-300 m 3 / h. They can only be installed in large kitchens and provided that you do not cook food on the stove very often. If the hob is used frequently, then the power should be at least 600 m 3 / h.

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Formula for calculating the power of a kitchen hood

You can do the calculations yourself using a simplified formula:

Q– exhaust power (m 3 /h);

S– kitchen area;

H– height of the kitchen;

12 – coefficient (number of air replacement cycles per hour)

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According to sanitary standards, 10-15 air replacement cycles should occur within an hour. The factor 12 is the chosen average value.

For example, S= 10 m2, H=2.5 m2

With these values ​​it turns out:

Q=10 × 2.5 × 12 = 300 m3/h.

Other factors to consider

Calculations using the formula have an average value, because other nuances must be taken into account:

• Hob type. For an electric stove, the coefficient reading can be up to 15, because apart from the fumes from the products, no other substances enter the air. But with a gas stove, they also release harmful substances from gas combustion. In this case, the coefficient is taken from 20.
• Hood type. When using flow-through, it is necessary to take into account the throughput of the existing ventilation shaft. With recirculation, this factor does not matter.
• Room layout. If there is an open entrance to next room or the door often opens there, then you need to take into account the large area of ​​​​the room when calculating.

Choosing a kitchen hood

If you have the means, choose a model that operates in two modes - combined (). It's more convenient option. There are already models on sale that operate almost silently – with a level of no more than 40 dB. An alternative to one powerful engine is a system with two, but less powerful, which produce much less noise. Fans play an important role in the operation of exhaust devices. Best withstand maximum loads tangential and diametrical. The size of the hood must be larger than the area hob so that steam and dirt do not reach the ceiling.

Video: rules for calculating the required hood performance

Among the abundance of models presented for sale in stores, it is difficult to immediately navigate and make right choice. Correct calculation the power of the exhaust system, choosing a model of the appropriate size and method of operation will allow you to create a healthy microclimate and safe conditions in your home.

The atmosphere of the house is more or less protected from the dusty and polluted street, but is defenseless against air pollutants produced by the kitchen. Agree that open window when cooking - extremely little.

You need an exhaust hood over the stove and a ventilation duct with an outlet “outside”, but first, calculate the hood for the kitchen to select equipment with suitable power. But how to do this without involving specialists?

We will try to advise you - this material discusses in detail the procedure for performing the calculation, provides formulas and specific examples calculations. Also selected visual photos and useful video tips on choosing and installing hoods.

In modern apartments, a hood, better known as a hood, is located above the kitchen stove. Many homeowners are convinced that this air collector is responsible for the ventilation of the kitchen.

Therefore, with a clear conscience, they lead the ventilation duct pipe from the hood into the ventilation hole, designed and built by the designers of the high-rise building.

What happens if the standard ventilation in the kitchen is blocked with an air duct from exhaust hood? The intensity of air exchange in the apartment will decrease sharply.

Installers kitchen hood and sellers of kitchen umbrellas usually state the opposite. They will say: this equipment will significantly improve the quality of air supply at home, because it has a powerful ventilation unit.

However, the power of a stove hood has nothing to do with ventilation. The reason is that the air exchange in the apartments of most residential high-rise buildings, especially those built before 2000, was designed with the expectation of.

The principle of air exchange in multi-storey building based on sources supply air(windows, vents, etc.) and exhaust ducts (Fig. on the left). The latter are displayed vertically through all floors of the building. The kitchen hood can be connected to the duct (picture on the right) or not connected

Street air entered through the cracks of the window frames and front door. And the channels in the bathroom and toilet were used to remove “stale” air. It would seem – what’s wrong?

The hood in the kitchen is for extracting air. So why can’t you “stick” an air duct from an exhaust hood into it? It's all about air performance.

Features of the kitchen hood

For models of exhaust hoods, the power is significantly higher - 200-1100 m 3 / h. This power is necessary to draw volatile pollutants generated during cooking into the air duct.

However, sellers of hoods state a different reason for choosing the power of an exhaust device - the need for frequent air exchange in the kitchen.

The hood duct installed above the stove is not responsible for air exchange in the kitchen. This device only removes volatile cooking products. Legend: A – removal of combustion products from the stove, B and C – direction of air movement during the air exchange process

Mechanical ventilation standards actually state 10-12 times air changes in the volume of the serviced room ( SNiP 41-01-2003).

But the hood located above the kitchen stove does not perform the function of “room ventilation” because it is not capable.

Air in need of renewal (replacement) accumulates near the ceiling. The exhaust hood is not able to suck it into the ventilation duct - its socket is not set high enough. A air flow behaves differently during ejection and injection.

The electromechanical installation draws air from a distance not exceeding the diameter of the suction socket. Those. with a hood hood width of 400 mm, air located no further than 400 mm from the socket will be drawn into it.

Meanwhile, the air flow is released over a distance exceeding 15 diameters of the exhaust opening.

A simple “home” example: a turned on household fan. With him reverse side the air movement is barely noticeable, but from the front there is a powerful air flow. By the way, the vacuum cleaner only works to suck up dust at a minimum distance from the carpet.

The only one effective method removal of volatile cooking products - an independent ventilation duct. Otherwise, odors will remain in the house

The exhaust hood over the kitchen stove performs the only task - removing the air that comes to it from the surface of the hob.

Of course, in exchange for the pumped air, another portion of it will flow from the vent to the stove, open door to the next room, etc. But a complete change in the air volume in the kitchen will not happen.

If cooking odors rise to the ceiling, they will not participate in the mixing and will be difficult to remove.

For this reason, the instructions for exhaust hoods contain the following conditions and work: 600 mm from the electric stove; 750 mm from the gas stove; Do not allow air flows (drafts) when the hood is operating, otherwise odors will spread throughout the room.

A stove hood does not provide air change in the kitchen. When choosing its model, the air volume of the room does not matter. The relationship between the size of the kitchen and the power of the exhaust hood was invented by sellers of kitchen appliances salons.

When performing calculations for selecting a kitchen hood, the following factors should be taken into account:

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You also need to make sure that the ventilation unit is in working order and that there is power supply to it.

The operation of the hood can also be hampered by drafts that interfere with the vertical movement of convection air flow from the stove. If the problem of a “weak” hood is not detected, its source is located outside the kitchen.

The performance of the exhaust hood depends on the cross-section of the ventilation duct, where the fumes from the kitchen stove. And homeowners often install an overly powerful hood, or assign it an exaggerated operating mode.

Residential property owners follow a simple logic - the stronger the fan pulls, the better the removal of volatile contaminants from the stove.

This is not true. The performance and operability of the kitchen hood system directly depend on the throughput characteristics of the ventilation duct.

Exiting the ventilation duct for the kitchen hood to the façade of the building will ensure the safety of the draft in the ventilation duct. Installation of a check valve and grill cover is required.

For example, a supply and exhaust air exchange ventilation duct located in the wall of a house is not capable of removing more than 150 m 3 /h of air.

Firstly, the cross-section of such ventilation ducts does not exceed 130-140 mm, which is not enough for mechanical ventilation. Secondly, regular duct ventilation in high-rise buildings it is extended and contains multiple irregularities.

The instructions for the ventilation unit usually contain a diagram showing the relationship between pressure in the ventilation duct and performance. An increase in pressure causes a decrease in hood performance.

Ventilation ducts in houses are assembled clumsily: uneven walls; solution drips; narrowing due to displaced blocks; lots of turns. Or even completely - the ventilation shaft may be clogged. In such a situation without .

Attempts to increase the performance of a ventilation hood connected to the house ventilation duct have the opposite effect.

The stronger the air flow, the more intensely it is hampered by defects in the cross-section of the ventilation duct. And if the actively pumped air cannot move forward, it moves backward.

A simple example is a soccer ball. The more air you pump into such a ball, the more difficult it is to operate the pump. The obstacle becomes pressure - there is a lot of air, it tends to come back through the tube, pushing out the pump handle.

A similar situation with the hood increased power– the more intense the air is supplied, the more its work is blocked.

The ideal ventilation duct for a kitchen hood is short, with a minimum of bends. Therefore, it is necessary to remove air from the stove not through the supply and exhaust duct, but through one made specifically for the exhaust hood.

Hole in façade wall, rigid or flexible duct (ideally round section), and a lattice air intake at the outlet of the channel. This is how you should equip a kitchen hood.

Choosing a hood for the kitchen should begin with determining the technical characteristics of the device you like. Many users do not study this issue well enough, paying attention only to the dimensions and design of the device. As a result, they acquire a device that is too weak, which cannot cope with the air masses in the room, or, on the contrary, it is too powerful, creating noise and consuming a lot of electricity. To avoid these problems, you need to know how to calculate the hood in accordance with the dimensions and features of the kitchen.

Among the technical characteristics Special attention It is worth paying attention to the power and performance of the device. These indicators reflect the volume of air masses that the hood passes through itself over a certain time, as well as the energy spent on this process. If you correctly calculate the volume of air in the room and take into account additional factors, you can accurately determine how much time the appliance needs to completely ventilate the kitchen. This will allow you not to make a mistake when choosing an exhaust device and subsequently use it as efficiently and economically as possible.
In this material we will tell you how to calculate the power of a kitchen hood so that it successfully copes with the ventilation of the room.

Types of kitchen hoods

Exhaust devices are divided into several types according to their method of operation, design and mounting option. The type of device often determines the degree of its performance, so at the first stage of selection, it is worth remembering this pattern.

1. Flow hoods are models equipped with a dome that remove polluted air into common system ventilation through the chimney. Such hoods can have quite high power.
2. Recirculation hoods are compact hoods, the operating principle of which is to pass air masses through a system of cleaning filters. These models, as a rule, have less power than flow-through models; they pass a limited volume of air through them.

Rules for calculating performance for hoods different types are somewhat different. In a recirculation system, the main factor is the power of the motor, and in a flow-through system, the efficiency of air removal into the ventilation shaft.

Formula for calculating the performance of a recirculating hood

The standard calculation of the required performance of a kitchen hood is carried out using the following formula:

where: N - design capacity, m³/hour;
S—kitchen area, m²;
h – ceiling height, m;
12 - accepted by SES;
1.3—minimum reserve ratio.

Hood performance calculator

• when using an electric stove;
• kitchen with closed doors and windows, separated from other rooms;
• The shape of the room is rectangular.

It is important to note that the calculation formula allows you to find out what volumes of air the device will process at maximum power and operating speed. Of course, in real conditions the device cannot constantly operate in the most energy-consuming mode. To obtain a more accurate result, it is recommended to add 15–20% to the final figure, thus you will calculate the performance of the kitchen hood for efficient work in medium mode.

If used for cooking gas stove, then coefficient 12 should be changed to 20 without hesitation. In this case, in addition to fumes, ventilation will have to remove gas combustion products from the kitchen. If the design has a carbon filter, it is worth adding 20 to 30%, since it creates additional resistance for the incoming air.

Calculation of the performance of a flow-through exhaust system

Calculation of the power of an exhaust hood with an air duct is also carried out by calculating the volume of air masses in the room. However, the performance of such a system is affected by big influence air duct capacity. If the air exhaust duct is not installed correctly, the high-power appliance will not operate efficiently and may even fail. Common problems, arising in this case - high level noise and overheating of the electrical parts of the device.

In almost all apartment buildings The air ducts do not exceed 12–13 cm in diameter. Up to 400 m³ of air can be removed through them per hour. This figure should be taken into account when choosing a hood for the kitchen - if you buy a device with a higher performance, the power consumption will increase with a slight increase in productivity.

An important factor is the length and shape of the chimney pipe. If the exit to the ventilation shaft is too far from the installation site of the hood, and the channel itself has unevenness and angles, the air will pass through it at a lower speed. In this case, installing a powerful exhaust device is also unjustified.

Effect of hood shape on power level

In addition to differences in the way they work, kitchen hoods also differ in the type of design.

1. Dome or fireplace. This design is made in the shape of a trapezoid or cone. Thanks to this device, it creates additional natural cravings air. It can have different powers, up to the highest levels.
2. T-shaped. A simplified version of a hood with a chimney, instead of a dome it is used rectangular panels. In a compact form it can be built inside furniture. With a wide drawing surface, it often has high productivity.
3. Inclined. An appliance with a chimney, the lower part of which is located at an angle relative to the wall. This shape provides good air draft and saves space. Has high and average performance indicators.
4. Wall-mounted. A device with filters that purify the air and remove it back into the room. It has no outlet for ventilation. Has a medium power level.
5. Hanging or sliding. Convenient and discreet, but ineffective models of recirculation hoods. As a rule, they have low power. Used on small kitchens or upon provision additional system ventilation.

Thus, we can conclude that the best option for spacious rooms is the classic fireplace or T-shape ventilation, as well as some of the inclined models. They can provide enough power to ventilate the kitchen. IN small rooms You can also install a wall-mounted recirculation model, but in this case you need to be especially careful in calculating the performance of the hood and the volume of air masses.

Hood dimensions as an indicator of performance

When calculating the power of a kitchen hood, it is logical to assume that the larger the exhaust surface of the device, the greater the volume of air it can pass during operation. Accordingly, small (built-in or folding) hood models have low performance indicators, while large dome hoods have the highest performance.

This is the only one external factor, by which you can “determine” the operating power of the device by eye. However, today this approach cannot be called correct. Modern hoods can be highly efficient even with a compact design. An example of this is T-shaped and inclined hoods, which, in the absence of an impressive dome, do an excellent job of ventilating even spacious rooms.

Noise level at different device performance

noise level

When a large volume of air passes through the exhaust ducts, a sound naturally arises, which increases when the motor operates with high power. In residential areas, noise can interfere with the comfort of the kitchen and even penetrate into other rooms. Therefore, it is very important to choose a hood of such power that the noise level during its operation does not exceed permissible limits.

Small hoods with low power have the lowest noise levels - their values ​​do not exceed 40–45 decibels. This is a fairly comfortable level for permanent job device in automatic mode. However, when choosing such a model, you will have to sacrifice the efficiency of its operation.

Kitchen hoods with high power have high noise levels and can create discomfort when working in small rooms. Experts recommend turning these devices “on full” only in emergencies; for daily use, set the settings to average. Then the hood will not emit loud sounds at work.

Features of calculating the power of a kitchen hood

Let's summarize to answer the question of how to choose a kitchen hood based on power? To do this, you should take into account a number of factors that we have already noted above:

• Calculating the volume of air in the room.
• Find out the diameter of the air duct and its length.
• Having made adjustments in accordance with the presence of filtration systems and pipe bends.
• Noting the type of stove and the frequency of its use.
• Having determined a comfortable noise level.

Together, calculating the performance of a kitchen hood using these parameters will ensure that the appliance operates efficiently and economically. You can read about other features of choosing ventilation systems in special sections of our website.

The consequences of poor ventilation in the kitchen can be very different - from greasy deposits on the ceiling and walls, due to which repairs need to be done again after just a few months, to constant poor health, since you have to breathe air contaminated with harmful impurities while cooking.

A properly selected kitchen hood can solve all of the above problems. However, only if its performance meets the required parameters.

What is the performance of the exhaust device? This is the volume of air (in m3) that the device can clean or remove from the kitchen in one hour of operation. Quite often this indicator is called power, but this is not entirely true. Power is the amount of electricity consumed by a device per hour of operation, and it is measured in kilowatts. Of course, the more powerful the device’s motor, the more air it can process, but this rule does not always work. Therefore, it is not necessary to purchase the most powerful model to get the best results.

Before purchasing, many people think about how to calculate a kitchen hood, that is, choose the right performance, power and size. The efficiency of the exhaust device depends on the combination of these factors. If everything is quite simple with the size - it must correspond to the parameters of the working surface, then you will have to work hard to choose a model that fits the other criteria.

So as not to just buy a cute kitchen accessory instead functional device, you will have to calculate the performance of the hood before going to the store. To do this correctly, it is necessary to understand in detail the design and operating principle of exhaust devices, as well as derive the calculation formula. You will find all the necessary information in our article.

How does a kitchen hood work?

The hood design of any model is not particularly complicated. Its working panel hides a grease filter, which is responsible for rough air purification. The mesh of the filter cartridge traps airborne fat particles. This component is required for any type of exhaust devices. It prevents grease from settling on the internal parts of the mechanism, thereby extending the service life of the device.

Immediately behind the filters there are fans that remove contaminated air through the air duct into the ventilation duct. The fans are connected to motors designed specifically for use in hoods. To make the operation of the device quieter, manufacturers are trying to introduce various innovations, from coating the blades with Teflon to insulating the motor in an individual housing. Sometimes two turbines are installed, operating at lower power and, accordingly, quieter.

If the hood operates in recirculation mode rather than exhaust mode, its design includes another filter - a carbon filter. Its task is fine cleaning and removal of the smallest impurities and odors, since the air flow then returns to the room.

The housing of the exhaust device can be made of the most various materials. Cheap models are most often made of plastic, the main advantage of which is its ease of maintenance. The most durable and durable devices are considered to be made from of stainless steel and aluminum. The use of tempered glass is very popular, which is easily cleaned from any contaminants and tolerates high humidity and temperature changes.

Having learned how the hood works and works, you will be able to operate the device correctly and provide it with proper care to avoid possible breakdowns.

All models of exhaust devices are designed approximately the same inside, but differ in the design of the body and installation features. According to this criterion, kitchen hoods are usually divided into several types.

Hanging or flat hoods mostly fall into the budget category. They are either mounted on the wall above the stove or attached to the bottom of a wall cabinet. The engines of the devices are not very powerful, so they are not suitable for large rooms.

Built-in kitchen hoods resemble flat hoods in design, but are installed inside hanging cabinets. IN Lately models have appeared for installation in the ceiling, wall and even kitchen countertop. Many of them have pretty good performance.

Dome (fireplace) models are attached to the wall or ceiling above the stove. This type of hood is an active design element, so choosing them appearance It has great importance. The devices are distinguished not only by a large range of sizes, but also by a wide range of colors and shapes. They are considered one of the most productive. Based on the installation method, dome hoods are divided into wall-mounted, ceiling-mounted and corner hoods.

Inclined hoods appeared on the market relatively recently, but have already won many fans. Internal organization The devices are absolutely standard, but in appearance they are strikingly different from all other models. Their working panel is not located parallel to the stove, but at an angle to it. Inclined hoods are a striking example of implementation modern technologies in the kitchen.

Island hoods are chosen by owners of large kitchens who decide to place the work surface on a kind of “island” in the middle of the room. Island models have an exclusive design and high power, but their price is quite high.

Operating modes

When purchasing a kitchen hood, its operating mode is of great importance. His choice depends on the condition ventilation system premises. Nowadays there is practically no strict division of hoods into flow-through and circulation - the devices can operate in both modes. Therefore, you can decide how you will operate the exhaust device after purchasing it. If you can’t install an air duct, buy a carbon filter and the hood will purify the air rather than exhaust it. Many people use both modes, changing them depending on conditions and time of year.

Air exhaust

Hoods with outlets are traditionally considered the most effective. Indeed, just a few years ago recirculation models could hardly compete with them, but now a lot has changed.

A hood with a ventilation outlet should not purify the kitchen air, but remove it outside the room. For this purpose, a pipe leading to the ventilation duct is connected to it at the installation stage. Pipes with a corrugated or smooth surface are traditionally used to construct an air duct. The first ones are easier to install, as they easily follow any curves of the walls, however, when air passes through them, additional noise is created. Smooth plastic air ducts (round and rectangular) are more difficult to install, but they look more attractive.

The presence of a grease filter in a hood with an outlet is mandatory - without it internal parts will quickly become covered with a layer of fat. But you don’t have to install coal - there is no point in thoroughly purifying the air, which will still be discharged to the street. Savings on replacing carbon cartridges – additional benefit branch models.

The possibility of installing an exhaust device with air removal largely depends on the condition of the ventilation duct. In most houses old building it is unsatisfactory. Ventilation is simply not designed for the installation of powerful hoods; the air ducts have a small cross-section and are often clogged with debris. In this case, even a device with high performance will not work efficiently enough. It’s easier for residents of private houses - they can lead the air duct directly to the street by laying an individual channel for it. This practice is increasingly being used in city apartments.

The disadvantages of hoods with ventilation outlets are increased noise levels and cooling of the air in the room in winter time, as well as the complexity of installation due to the need to lay an air duct.

Recycling

A recirculation hood, unlike an exhaust hood, does not remove air from the room, but cleans it, then returning it back to the kitchen. In this device, the carbon filter is not only mandatory, but practically the main element. The degree of purification, and therefore the efficiency of the device, depends on its quality.

If a grease filter traps only suspended particles of fat, then a carbon filter catches everything else - impurities, odors, fumes. Naturally, all this does not disappear anywhere, but remains inside - the adsorbent absorbs the pollution ( Activated carbon). The carbon filter cannot be cleaned and used again - the element must be replaced. Its service life depends on the intensity of use of the hood, as well as on the manufacturer. On average it is 2-4 months, but some cartridges in premium devices can last up to a year.

The main advantage of a hood with recirculation is that there is no need to install an air duct. Simply mount the device on the wall, plug it into a power outlet, and it's ready to go. The noise level of such models is significantly lower than that of flow-through models.

Many people consider the fact that during operation of the hood the air in the kitchen is not replaced with fresh air, but simply cleaned, as a disadvantage. However, when installing a vent device, the air flow in the cold season, when it is impossible to open the window, enters the kitchen through slightly open doors from other rooms, and sometimes from the same ventilation if the hood is not equipped check valve. Such air can also hardly be called fresh, although there will be no smells in it. Therefore, the advantage of exhaust hoods, which consists in replacing polluted air with fresh air, should not be considered so obvious.

The main disadvantage of recirculating kitchen hoods is the additional cost of replacing carbon filters. Although, given the low cost of components and their rather long service life, this disadvantage is also quite relative.

Kitchen hood power

Now let's talk a little about the power of a kitchen hood. We have already talked about what this is above. We will talk specifically about the amount of energy consumed, which is measured in kilowatts.

As already mentioned, the power of the hood motor does not always have a significant impact on the performance of the device. Based on this indicator, it is first of all worth assessing energy consumption: the lower the power, the less electricity the device will consume. It should also be taken into account that overly powerful motors produce quite a lot of noise.

Depending on the model, the power of exhaust devices can be from 25 to 600 W. Therefore, you can connect them to regular sockets. More powerful models are rarely connected directly to electrical wiring.

Calculation formula

Having learned about the design and operation features of kitchen hoods, you can proceed to calculating performance. Most often, a simplified formula is used for this purpose, which takes into account the area and height of the room where the device will be installed. True, some suggest calculating the required performance based on the total thermal power of the slab, the diameter of the air duct and the number of its bends, but such calculations can only be done by specialists.

The formula for calculating hood performance looks like this:

Q is the required productivity, S is the area of ​​the room, h is its height. 12 is the coefficient of air renewal in the kitchen in one hour (according to SNiP standards).

But this formula assumes that the kitchen hood will always work at the limit of its capabilities. This is not advisable. Firstly, the noise level at maximum speed is too high, and secondly, the internal mechanisms wear out very quickly. Therefore, a performance reserve is required. Which? Now let's do the math.

The concentration of harmful impurities in the air directly depends on what type of stove you have in your kitchen. In accordance with this, the air exchange coefficient will need to be changed in the formula. If the stove is electric, instead of 12 we set it to 15; if it is gas, we increase the coefficient to 20.

Next, you need to take into account the operating mode of the hood. If the device is flow-through, its efficiency is greatly influenced by the condition of the ventilation shaft. If the channel is dirty, it is better to increase the productivity margin. Some experts recommend multiplying the result by two. That is (for an electric stove):

Q= (S x h x 15) x 2.

In recirculation mode, additional resistance to the passage of air flow is created by a carbon filter. Therefore, productivity needs to be increased again, this time by 30-40%.

Advantages of Elikor hoods

Despite the large range of exhaust devices European manufacturers, more and more buyers prefer domestic Elikor hoods. The company has held a leading position in its segment for more than 20 years.

All produced models are manufactured taking into account the basic principles of ergonomics, and their functionality ensures the most comfortable work in the kitchen. One of the most important advantages of Elikor hoods is the presence of powerful motors, which are produced in Italian factories. Their use has not only significantly reduced energy consumption and noise levels, but also improved the performance of the devices.

Special brackets included with the devices make it easy to fix the case even on the wall along which the gas pipe. Reusable five-layer grease filters are easy to clean thanks to a special coating.

The range of Elikor hood models includes several design lines that differ external design and the materials used. To equip modern kitchen Exhaust devices of the Modern series are designed, having strict geometric shapes and enough laconic design. The emphasis is on the variety of functions and modes.

Elikor is a series of decorative hoods that create bright accents in the interior. Almost every model uses a combination of several materials.

Elikor Classic is a collection of exhaust devices with traditional design and familiar color shades. Country – models in light colors with wooden inserts.

Impressive and specifications Elikor hoods. Their productivity can reach 1000m3/hour. The devices operate in 3-7 speed modes, and the noise level does not exceed the norm. The control can be either mechanical or electronic (touch). LED lamps provide high-quality lighting. And you get all this at a very affordable price.

Purchasing from a company online store means an official guarantee (60 months on models with an Italian turbine), fast delivery, convenient design orders, telephone consultations with managers.

Building a house or making major renovations in an apartment without equipping the kitchen with a suitable hood is wasted money. Soot from the fire, grease fumes and odors of cooked food very quickly permeate the furniture and walls of not only the kitchen, but also all rooms. Besides, fresh air– the key to health and good appetite!

The role of the kitchen hood

Modern design solutions When designing a kitchen, the hood is considered as part of the decor. Naturally, the integrity of the ensemble of furniture and equipment pleases the eye, but still, the main parameter in choosing this equipment should be its functionality.

The kitchen exhaust fan should work properly:

• purify the air from harmful combustion products;
• prevent grease and soot from getting on furniture;
• remove odors as much as possible;
• do not create a lot of noise when working.

The full performance of all functions is possible if the hood performance is selected correctly. Companies specializing in the production and sale of this type of household appliances offer numerous options for kitchen hoods; their power is indicated in the passport. How do you know which one is right for you? A calculator and simple but accurate calculation will help with this.

Performance and Power

These two concepts, although closely related, are not the same thing.

The performance of a kitchen hood is the amount of air it can pump through itself in one hour. Measured in cubic meters per hour (m 3 / hour).

Power determines the amount of electricity that will be spent on operating the fan, lighting and other functions of the hood. This indicator most likely affects the calculation of efficiency. When deciding the question “how to calculate the power of the hood”, you should pay attention to both maximum loads and intermediate loads, when operating in different modes. The most correct calculation of power is average figures.

The standard formula for calculating productivity is as follows: kitchen area multiplied by ceiling height and multiplied by 12 (air renewal coefficient accepted by sanitary standards), or (SxH)x12.

What affects performance?

A simple basic formula does not give a complete idea of ​​what kind of hood will be needed in your case. In addition to the basic indicators, it is necessary to correct the calculation, taking into account:

1. Operating principle.
2. Location features.
3. Hood design.

Let's take a closer look at how these parameters adjust the performance calculation formula.

Operating principle and performance

With all the variety of designs, the operating principle of hoods comes down to two options: air exhaust and recirculation.

Air exhaust work

In this case, the fan absorbs contaminated air along with soot particles and removes them outside through ventilation ducts. Since the air must be constantly renewed, access to fresh air into the room is required for complete purification.

Working on recycling

This method purifies the air in the kitchen if there is no possibility of exhaust. Kitchen fumes pass through metal and carbon filters and return back into the room.

How do these indicators affect the calculation calculator? Typically, recirculation hoods have lower performance, higher noise levels and require more power. For fans with exhaust, the performance is adjusted in direct proportion to the length of the air exhaust.

Location and performance

The increase in efficiency is associated with the location of the kitchen air purifier and the area of ​​the room being cleaned. The fact is that the standard calculation assumes a closed kitchen space. If the kitchen is connected to the living room or the doorway between the rooms is formed by an arch without a door, you need to calculate the total area of ​​​​both rooms.

The efficient operation of the hood is ensured if it is placed directly above hob and slightly exceeds it in width.

The air exchange coefficient adopted by SNiP 10-12 is also a relative value. Using the hood economically allows you to increase the coefficient to 15 for electric stoves and up to 20 for gas hobs.

The calculators offered on many sites for calculating the power and performance of hoods mainly offer standard forms. A calculator that requires you to specify more parameters will be more accurate.

In any case, it is more advisable to buy a hood that has a performance slightly higher than the maximum you require. This will ensure that it does not operate in full mode, which in turn will reduce power consumption and, accordingly, extend the service life of the device. And the noise level is significantly reduced, which is important, especially during long-term cooking.

Which design is better?

There is no single answer to this question. Again, it all depends individual characteristics kitchen arrangement.

Dome hoods

A large dome-shaped fume hood above the stove is considered to be given time the most effective. Such ventilation is appropriate in large kitchens, preferably with an island-style hob.

Flat hoods

This type of traditional design is quite common in areas where there are problems with installing an air exhaust system. Mostly flat-shaped ventilation devices are equipped with a filter system and work for recirculation and cleaning.

Built-in hoods

Their shape resembles that of a dome, but is smaller in size. The main part of the structure is hidden in a cabinet; only the control panel and the main panel remain visible. The most ergonomic option, usually the least powerful. But there are exceptions.

A small kitchen area does not mean a low-performance hood. In small indoors with large volumes of stove operation, the air becomes polluted much faster.

Let's summarize: calculating the required hood performance is not a difficult matter. This is easy to do with a calculator. The only rule is an individual approach to this event, taking into account all the nuances.