Hood without exhaust to ventilation: principle of operation, diagrams, installation

The installation of the hood in the kitchen due to the norms of ventilation in the living room. If it is not possible to connect the device to the general house system, an exhaust hood is mounted without diversion into ventilation (other names are recirculation, coal).

We will talk about the features and principle of operation of the exhaust device without an air duct. In the article presented by us, the technical characteristics are described in detail, its pros and cons are disassembled. For those who wish to install exhaust equipment on their own, an installation guide is provided.

The content of the article:

  • Typical ventilation schemes in the kitchen
  • Types of hoods without exhaust in ventilation
  • The principle of operation of recirculation models
  • Technical Overview
    • Calculation of device performance
    • Is the noise level important?
    • Convenient control and adjustment
    • Important features and options
  • More on exhaust filters
  • Rules for mounting a recirculation model
  • Conclusions and useful video on the topic

Typical ventilation schemes in the kitchen

There are two main schemes of kitchen ventilation: natural and forced. In the first case, the ventilation is carried out using holes in the walls and open air vents, on the one hand, and house ventilation ducts on the other.

In the second case, the change of air is carried out mechanically, by installing volatile devices. The most successful is the third, the combined version, in which the natural supply air scheme, according to which air spontaneously enters the room, and forced discharge through the kitchen hoods

Types of household hoods

According to the method of air purification, all hoods can be divided into 2 types - diverting (retractor) and recirculation. The latter are not connected to the ventilation ducts by means of pipes and ducts; they function offline.

There is a third type - the combined devices, which are equipped with double filters and an air duct, can work both with connection to the ventilation shaft and independently.

Natural ventilation has the only advantage: to ensure a comfortable microclimate in the kitchen (as in other rooms) no additional material investment is required.

But it has low efficiency. When the cooking process takes place on an electric or gas stove, heavy odors quickly spread due to slow air exchange.

Devices for ensuring forced ventilation are much more productive, but the equipment necessary for the realization of the mechanical scheme is dependent on the supply of electricity.

Work scheme hoods

Exhaust hoods and recirculation devices do an excellent job of cleaning up polluted air and removal of unpleasant odors, but they do not cover the zone under the ceiling, where vapors and particles also fall fat

Taking into account these features, a combined scheme is used that combines the work of exhaust devices and a natural ventilation system.

With typical schemes and options for ventilation in the kitchen will introduce the articlewhich we advise you to read.

Types of hoods without exhaust in ventilation

If we compare two types of hoods - with or without a vent to ventilation - then the first category has more advantages. The main advantage is higher productivity, due to which air exchange is much faster.

Sometimes a series of technical issues impedes installation exhaust device with ventkanal, and you have to buy the hood for the kitchen without the outlet and connect to the ventilation, that is, recirculation.

Built-in recirculation hood

According to the installation method, there are two types of hoods - installed separately and recessed. The built-in ones are good in that they occupy a minimum of space, and the cabinet in which the work unit is masked is used additionally for its intended purpose - to store kitchen utensils.

Modern devices for air purification differ in the material of manufacture, design, technical capabilities.

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What are devices with filters made of?

The main material for the production of the body and grease filters is stainless steel, but there may be elements of heat-resistant glass or special plastic

Various colors range hoods

Along with the devices in the traditional silver finish you can find white, black and color models that are ideally suited to the interior of the kitchen.

Cooker hoods for kitchen islands

The popularity of separately located in the center of the kitchen work units - the islands - led to the fact that manufacturers began to produce island models, including on coal filters

Technical equipment of exhaust devices

For modern models, features such as touch or remote control, several modes of fan operation, effective illumination of the working area are typical.

What are devices with filters made of?

What are devices with filters made of?

Various colors range hoods

Various colors range hoods

Cooker hoods for kitchen islands

Cooker hoods for kitchen islands

Technical equipment of exhaust devices

Technical equipment of exhaust devices

The cost of devices depends on the technical "stuffing", quality coal and fat filter elementsdesign and manufacturer level. But it should be chosen carefully: sometimes the models of promoted brands are no different from little-known manufacturers, and they are 2-3 times more expensive.

The principle of operation of recirculation models

Unlike exhaust hoods with a vent to ventilation, coal models do not “pump out” the air from the room into the ventilation duct, but rather circulate it and purify it during filtration.

The working principle of the recirculation model

Contaminated air from the working area is drawn into the device, passes first through the grease filter, then through the carbon filter and out through the holes located in the upper body parts

The main operating elements of the exhaust system, providing recycling, are the engine and fan. There are options with 2 engines or with 1 engine, but 2 fans on each side. They are located inside the case, above the filters (on dome models) or in between (on embedded varieties).

Performance depends on the power of the engine, which operates on 220 volts. This means that before installing the coal model, you must install a separate outlet for connection. Some people mistakenly think that in order to provide the necessary volume of fresh air only exhaust hoods with exhaust require ventilation.

In fact and recirculation models they need constant updating of the air flow, since cleaning the air with filters does not make it fresher - it just removes greasy fumes and tiny particles of dirt. Therefore, natural ventilation also needs to be done daily.

Technical Overview

When buying a new hood or replacing an old one, you need to find out the features of specific models. Attention should be paid to the design, design, and most importantly - the technical characteristics that affect the efficiency of the ventilation equipment.

Calculation of device performance

To properly navigate the choice of an effective device, you need to know the exact area of ​​the room. Usually both the capacity and the desired kitchen size are indicated in the product data sheet.

For example, the Krone Camilla 600 has a capacity of 550 m³ / h (in recirculation mode - 385 m³ / h), therefore, it is recommended for room maintenance up to 11m² (ceiling height 2.5-2.7 m).

Hood performance

If a less powerful installation is used for the same area, it will simply not cope with the task, and a more powerful hood will waste energy.

To calculate the performance yourself, you need to multiply the volume of the room by the number of recirculation cycles and take into account the error rate. For the kitchen, the minimum number of recycling cycles - 12, KP - 1.3. Therefore, to find out the necessary performance, we consider:

11 x 2.5 x 12 x 1.3 = 429 m³ / h

It can be concluded that when using the Krone Camilla 600 hood for sufficient air exchange over an area of ​​11 m² is better to use the mode with the outlet to the ventilation, and use recycling only as an additional function.

The coefficient of error of 1.3 is usually used when calculating the performance of hoods with a tap, for recirculating models it is slightly more - 1.7.

Is the noise level important?

The second important parameter that needs attention is the noise level. If the owners of an apartment or house spend a lot of time in the kitchen, it is desirable that it be minimal. Also, this moment is relevant for those who live in studios, where the living room is combined with the kitchen.

Noise level table

Strong and harsh noises negatively affect human well-being, therefore increased requirements are placed on home appliances equipped with fans and motors.

Modern devices are quite quiet, as they are equipped with special acoustic noise protection. In coal extracts, sounds can make a fan, a motor, and air moving inside a structure.

Have devices with a vent to ventilation Noises often appear due to improperly connected air ducts.

Comfortable noise level

If you want the atmosphere during and after cooking in the kitchen to be comfortable, give preference to models with a noise level within 50-55 dB. The quietest devices work in the range of 35-42 dB

The high cost of the model is not an indication that the hood will work quietly. On the contrary, expensive equipment is more productive than cheap, so often instruments with a high price tag create many background sounds — more than 60 dB. Suppose the model Neff D55ML66N0 (36 thousand rubles) has a noise level of 72 dB, and the Elica Hidden HT (51.5 thousand rubles) has a noise level of 62 dB.

Convenient control and adjustment

It is necessary to use the hood daily, so it is desirable to purchase a model with affordable, understandable and convenient control. All control options can be divided into two broad categories: manual and remote.

Manual (or mechanical) has variations:

  • slider (meets less and less);
  • push button (the most common form);

Expensive models are equipped with electronic control devices with touch contact panels for transmitting commands.

Models of the middle price segment are decorated traditionally: on the front panel there is a row of buttons, with With the help of which you can set the desired mode (bypass or recirculation), change the speed, enable backlight.

Modern hood options

Modern programmable hoods have a number of useful additional deferred functions. For example, the interval ventilation mode will continue to clean the air even without your presence after a certain period of time.

For models with D / U, almost all adjustments are made from the remote, but the front panel also has buttons or a touch screen for selecting the operation mode. The more convenient the method of operation, the more expensive the equipment.

Important features and options

In addition to the basic technical characteristics, there are a number of properties that can be very useful during the operation. But if additional functions are not needed - you can save well on the purchase, as the electronic filling, various modes, programming increase the cost several times.

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Lighting - lighting work area

Several LED or halogen lamps located on the bottom panel provide effective illumination of the cooking surface. They compensate for the lack of overhead light, which arises due to wall-mounted cabinets.

Modes of operation - diverting and recycling

The lion's share of all hoods are universal devices capable of operating in both modes. If for some reason there are problems with the discharge of polluted air into the ventilation, use an autonomous mode with filtration

The number of operating speeds hood

If the device works all the time at the same speed, the cleaning intensity will always be the same - both when brewing coffee and when frying meat. The presence of several speeds is important for those who often, many and varied prepares

Presence of filter pollution indicator

Carbon filters, conducting fine air purification, are replaceable consumables. Thanks to the pollution indicator, you can see when it is necessary to replace cassettes or pads. Indicators are usually equipped with expensive models.

Lighting - lighting work area

Lighting - lighting work area

Modes of operation - diverting and recycling

Modes of operation - diverting and recycling

The number of operating speeds hood

The number of operating speeds hood

Presence of filter pollution indicator

Presence of filter pollution indicator

Competition exhaust devices on the market of household appliances is great, so manufacturers are competing in the invention of new features. For example, in some models, you can adjust not only the intensity of air intake, but also the degree of illumination of the space, as well as adjust the speed change in automatic mode.

Guidance of the choice of an extract without message with ventilation presented in the article, the content of which we advise you to read.

More on exhaust filters

Devices that work without discharge into the ventilation shaft are called coal because of the presence of carbon filters, which clean the air from specific kitchen odors. Most often it is a plastic cassette, having a different shape and filled with activated carbon.

Sometimes additionally use pieces of synthetic material, also impregnated with activated charcoal.

Charcoal filter for exhaust

Round carbon cassettes filled with granules or powder are usually sold and used in pairs. The plastic from which they are made does not change their properties when heated and is safe for health.

In addition to the carbon filter, there is anti-grease. For embedded models, it is located on the bottom panel and is a metal grill or grid.

Of course, it doesn’t catch smells with a net, but it copes with particles of dissolved fat that rise with the steam, perfectly. In this regard, it is recommended to wash the anti-grease filter about once every 30-40 days by non-abrasive means.

Grease filter hood

In contrast to the carbon filter, which is placed in the exhaust housing along with the engine and fans, the metal grill is visible and is part of the design of the models.

When buying replacement products, please note that there are original and non-original (universal) filters on sale. The second group is suitable for many models and at a cost lower than the parts manufactured by the manufacturer.

Carbon filters are usually enough for 3-4 months of active use, but the exact data are indicated in the instructions.

Rules for mounting a recirculation model

Before installing hood in the kitchen it is necessary to remove the dimensions, and for the embedded model to prepare a cabinet above the stove. If the equipment is attached to a ceiling or wall, you should check the strength of the base.

Hood mount

Typically, home appliances are equipped with brackets and holders for installation. For example, for the island type hood FALMEC LUMIERE a set of fixings is provided: ceiling platform and a set of metal cables

The hood is installed strictly according to the instructions, since the functionality largely depends on the quality and conditions of installation.

To avoid further problems associated with improper installation, you must follow the rules:

  • Maintain the distance between the bottom of the hood and the stove. There are well-defined norms: to the gas stove - 0.75 m, to the electric one - 0.65 m. But in the instructions you can encounter other figures - 0.6 m and 0.5 m, respectively.
  • Prepare in advance the place required size. The standard dimensions of built-in appliances are 50 and 60 cm (similar to a stove), but you can find fireplace and island modifications 80 cm, 90 cm and more.
  • Provide (if necessary) free space at the point of exit of purified air.
  • Install a separate power point with ground connection. Check that the voltage of the hood and the electrical network are the same.

The nuances of installation are completely dependent on the type of model. For example, consider the installation procedure built-in recirculation hood.

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Step 1 - dismantling the hinged locker

We remove the cabinet designed for the installation of the built-in hood from the wall and partially disassemble it - separate the bottom wall on which the equipment will be fixed

Step 2 - preparation of tools for work

A screwdriver, jigsaw, drill with drills (5 mm and 10 mm), a screwdriver and a marking kit are required: level, tape measure, compass, pencil

Step 3 - Checking the horizontal position of the locker

One of the conditions for the normal functioning of the device is a flat horizontal installation, so if the cabinet is initially fixed with deviations, they must be eliminated

Step 4 - preparation of the installation template

To simplify installation, the manufacturer completes the model with a mounting template, which shows the places for drilling and cutting holes. Fix the template on the shelf, mark the necessary points

Step 5 - Arrange Holes in the Shelf

Drill 4 holes for fastening the hood to the shelf, and in the upper panel of the cabinet with an electric jigsaw cut out the hole for the air duct using the same template (as the model is universal)

Step 6 - Fastening the Shelf

For small cabinets, it is more convenient to first fix the shelf on the hood, and then put the entire assembly into the cabinet. Take the mounting kit and fix the shelf on 4 screws

Step 7 - Installation of the hood in the cabinet

The bottom shelf, together with the exhaust hood attached to it, is inserted into the cabinet and fixed with screws. Check the strength of fasteners

Step 8 - Install the cabinet on the wall

The assembled structure - a cabinet with an exhaust hood - is hung on the wall. We check once again the horizontal installation and the reliability of wall fasteners

Step 1 - dismantling the hinged locker

Step 1 - dismantling the hinged locker

Step 2 - preparation of tools for work

Step 2 - preparation of tools for work

Step 3 - Checking the horizontal position of the locker

Step 3 - Checking the horizontal position of the locker

Step 4 - preparation of the installation template

Step 4 - preparation of the installation template

Step 5 - Arrange Holes in the Shelf

Step 5 - Arrange Holes in the Shelf

Step 6 - Fastening the Shelf

Step 6 - Fastening the Shelf

Step 7 - Installation of the hood in the cabinet

Step 7 - Installation of the hood in the cabinet

Step 8 - Install the cabinet on the wall

Step 8 - Install the cabinet on the wall

Lastly, we insert the metal filters. We check the operation of the device by connecting it to the power supply. Details the installation process of embedded type hood reviewed here. The useful information stated in the article deserves close attention.

To enable the simplest model slider, it is enough to manually push the filter panel towards you. If necessary, we attach an air duct to transport polluted air to the ventilation duct.

Conclusions and useful video on the topic

Often, manufacturers and companies selling products post reviews and instructions online. installation, so that there are fewer questions, and it was more convenient for users to operate the purchased equipment.

Video # 1. Installation instructions for Siemens recirculation models:

Video # 2. General information on hoods:

Video # 3. Comparative review of embedded models and "visors":

Video # 4. What to look for when choosing:

Domestic exhaust without an air duct is an excellent option for ventilation in the kitchen, if the ventilation duct functions poorly or there is simply no way to connect to it.

When choosing equipment, be sure to review the technical specifications, and during the installation follow the manufacturer's recommendations. The hood installed according to all the rules will provide a pleasant and comfortable atmosphere in the apartment.

Would you like to share useful information about the installation and use of the hood without the air vent? Have you ever installed the device yourself? Please write comments in the block below, share useful information and photos on the topic of the article, ask questions.

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