Cooker hoods with ventilation ducts: advantages and disadvantages
ABOUTThe microclimate throughout the house depends on the efficiency of the cooker hood. There are two fundamentally different systems: hoods for kitchen with outlet for ventilation and autonomous hoods operating on the recirculation principle. Exhaust hoods are considered to be more efficient, emit less noise and provide the air exchange required by building codes.
Hood over the stove
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Video: how to choose a hood for the kitchen
Types of kitchen hoods
All household hoods must pump an amount of air equal to 10 times the volume of the kitchen per hour. Such a requirement is contained in sanitary standards, it is based on the fact that heating devices are working in the kitchen, there is often an open flame, food is being prepared, and humidity is high. All these devices contribute to the accumulation of carbon dioxide, water vapor, and foreign odors in the room.
Sanitary standards require the organization of the exhaust air removal
If you look at the grate kitchen hoodwho worked on the stove in the average family for a month, you can see a significant amount of pollution. Obviously, without this device, all the dirt would have settled on the furniture, ceiling and utensils. High humidity contributes to premature destruction furniture, spoils the decoration of ceilings and walls. At high temperatures and open flames, the oxygen content is significantly reduced.
So much dirt accumulates on the ventilation grill
Contaminated air must be removed. This goal is achieved in two ways: by removing dirty air to the outside and replacing it with clean air, or circulating filtration.
a) Recirculation b) Removal of exhaust air with an inflow of fresh air
With bend
Kitchen hoods with ventilation ducts are the classic and most common appliances that are installed in the immediate vicinity of the stove as the main source of pollution.The air intake canopy is equipped with a special removable grill on which droplets of grease and dust settle. This is to prevent dirt from entering the common channel. The ventilation is usually forced using a built-in fan.
Removal of air through the ventilation duct with an exhaust fan
To operate such a hood, it is necessary to provide an inflow, since the outflow of air is significant. In the absence of an inflow - a window or a special supply channel - the so-called overturning occurs, when air from the very air begins to be sucked into a room with a rarefied atmosphere. ventilation duct.
Hood that connects to the ventilation duct
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Without bending
Kitchen hoods without venting into ventilation are powerful air filters. They are also mounted close to slabs, but have smaller dimensions. In addition to the removable grill and fan, filtration systems are included in their design:
- a coarse filter that retains moisture, grease drops and household dust is a fine plastic or aluminum removable grill, reusable;
- a carbon filter that removes microparticles, absorbs water vapors and odors, this filter is designed for about a month of use, after which it must be replaced.
Circulating hood
The performance of such a cleaning system meets sanitary standards, but to achieve it, more powerful electric motors have to be used. Over time, as the filters become dirty, the performance drops. The charcoal filter cannot be cleaned; it must be disposed of and replaced with a new one.
Coal filters for cooker hoods
Types of hoods by design
The stove can be located in various places in the room, even in the middle of it. Therefore, hoods can have different designs depending on the location of the plate. The following main types are distinguished:
- corner;
- wall-mounted;
- island.
Various designs of hoods depending on the location of the stove
Wall options are the most popular due to the classic slab layout. They can have a wide variety of dome shapes.
Classic wall-mounted hood
Island - located above a free-standing slab, which does not have an abutment to the wall, and are attached to the ceiling using a cable or a special pipe. Most often they are domed to capture more steam. In accordance with the design idea, they can be a real decorative element of the room.
Island type cooker hood with storage space for accessories
Built-in hoods are used for small-sized rooms and are mounted in a decorative box or built-in cabinet of a kitchen set. Most often they are equipped with a special pull-out panel to increase the working surface. The main advantage is space saving while working efficiently.
Built-in cooker hood with pull-out panel
Features of the operation of hoods
The exhaust hood is extremely easy to operate, as it does not require filter replacement and performance monitoring. The electric motor, which provides forced circulation, is located directly above the channel opening, so its operation is practically inaudible. The only thing that the built-in hood requires during operation is regular cleaning of removable parts. The grill should be washed once a month and the fan blades should be cleaned once a year.
Autonomous ventilation systems require not only regular washing, but also frequent filter replacement, which is very expensive. During operation, the air has to overcome a serious obstacle in the form of a dense carbon filter, due to which its speed drops dramatically.The electric motors of self-contained hoods are more powerful, therefore they make more noise.
Carbon filter
Installation of various hood designs
Most apartment buildings provide for the connection of a kitchen hood to a common ventilation duct, but technically this is not always possible. Hoods to the kitchen without being diverted to the general ventilation are convenient in that the only condition for their installation is the presence of nearby electric sockets.
Autonomous ventilation system built into the wall
In apartment buildings, the ventilation hole is not always located in the immediate vicinity of the stove. Sometimes for the output you have to use a long duct, which is an aluminum flexible sleeve or box.
Using a circular duct
Rectangular box for ventilation duct
It is noticed that when using a corrugated pipe as an air duct, the power loss can be 30%, the same happens in the case of a large number of turns. During installation, it is important to position the exhaust hood in such a way that the duct pipe has the smallest length, and all bends are at an obtuse angle.
Ventilation duct under the ceiling
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The air duct of the hood can be located behind a false ceiling, if one is used in your kitchen, or directly above the kitchen set as close to it as possible in order to be hidden.
Duct Laying Options
An extractor hood for kitchens with a ventilation outlet should only be used if this ventilation hole is not the only one. In typical houses, according to the norms, the exhaust holes are supplied to bathrooms, bathrooms and kitchens. If you close the kitchen opening with a hood, then it will only perform its functions if the fan is running. In the case when the cooker hood is turned off, the ventilation holes in the bathroom take over the air exchange function. Since one of the outlets is virtually excluded from the air exchange system, a constant supply must be organized for sufficient ventilation.
Organization of air exchange with multiple ventilation openings
If the kitchen vent is the only one, then the use of the built-in ventilation will be inconvenient, since air exchange in the entire apartment will be disrupted, the microclimate will worsen significantly, as will the health of family members.
Extractor fan in the kitchen
Calculator for calculating the diameter of the duct according to the speed and performance of the hood
What are the criteria for choosing a hood
A built-in hood will be an ideal solution for an apartment in the following cases:
- the presence of several vents, when closing one of them will disrupt the air exchange system;
- if necessary, save on replacement of consumable parts;
- if you want to have a powerful hood with a low noise level and low energy consumption.
Video: do-it-yourself installation of a hood in the kitchen with air exhaust into the ventilation shaft
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