Exhaust duct

For normal life in the apartment you need clean air. It should be provided by natural ventilation, which is always planned in residential buildings. But with intensive cooking in the kitchen, it is not enough, so in most modern apartments kitchen hoods are installed to help cope with the abundance of steam, fat and odors. If the owner decides to choose a circulating type appliance, installation of an additional ventilation pipe connected to the kitchen hood will be required. Find out how to do it yourself.

What is needed for proper maintenance of natural ventilation in the apartment?

You need to know that in city apartments only exhaust ventilation is installed, and the flow is provided by passive ventilators - windows.

Note! The ventilation system is effective when the supply and exhaust air volumes are equal. Therefore, during the operation of a powerful kitchen hood, you will have to open the window.

Supply system

The flow of fresh air can be controlled using the simplest air supply devices: windows and windows. After replacing wooden windows with sealed plastic ones, for these purposes it may be required installation of ventilation system valves. When replacing windows, it will be rational to install plastic doors in the kitchen and close them when cooking. Natural ventilation will quickly cope with air purification in a small room.

Natural range hood

The cause of a weak outflow of air may be a clogged ventilation duct. The owner of the apartment may clean the exhaust ductadjacent to the rooms and the grill. The main shaft with bends must be cleaned by workers of the housing organization.

It is possible to increase the efficiency of natural extraction by installing a fan at the entrance to the ventilation duct or inside it, which significantly increases the power flow. Similar methods turn natural ventilation into forced ventilation. It can not be used always, but only when cooking.

Cooker hood

With the local allocation of contaminants from cooking products, installation of an additional exhaust device is still required. It is of two types:

• recirculation hoodpurifying the air and returning it to the room;
• circulating (flowing), providing the conclusion of polluted air through the ventilation channel from the apartment.

In the first case, a flat device is installed above the stove and air is filtered through it. The ventilation duct in this case is not needed.

The outlet must not be installed too close to the stove, so you may have to replace the hood, since most appliances have a very short cord.

The main difference between mounting a circulation hood, which is also hung on the wall or built into kitchen furniture, is the need for a device duct. The vent is close to the stove. The best option is to place it directly above it. The outlet of the appliance should be located as close to the airway as possible.

Important! The duct should be as short as possible so as not to create additional noise and resistance to air movement.

Duct selection

The exhaust air is removed through a pipe, which may differ in the following ways:

• by material;
• diameter or dimensions of the sides of the box;
• sectional shape;
• flexibility.

Plastic duct

Most of the exhaust pipes are made of plastic, which in any of its varieties (PVC, polyurethane, polypropylene) has its advantages:

1. Noise reduction.
2. Low airflow resistance.
3. Easy installation and handling.
4. On a smooth surface, dirt does not accumulate.
5. Light load on the entire structure.

Ducts are made round and rectangular. The former have less resistance to air, while the latter are better suited to the interior of the kitchen. For each species there are adapters.

It is especially important to choose the right diameter or dimensions of the sides of the box and connect the duct at the inlet and outlet. A snug fit is ensured by the use of sealant.

Aluminum corrugation

The pipe in the form of an aluminum corrugation has a small length. During installation, it stretches, which makes the walls smooth and reduces noise. The flexibility of the pipe allows it to be placed in hard-to-reach places, but each bend reduces productivity. The standard pipe diameter can be 10, 12, 12.5, 15 cm.

Due to the unattractive appearance of the corrugation and plastic duct try to hide in closets or behind suspended ceilings. They are also masked behind the lower level of the drywall or rectangular plastic boxes with a color corresponding to the interior of the kitchen. It is possible to install spotlights on them, which will provide zone illumination of the stove.

Design

When considering the design of the ventilation duct for a cooker hood, it is important to consider several fundamental points:

• The diameter of the duct is selected so that it is equal to the ventilation hole and is larger than that of the kitchen hood.
• The number of bends and the length of the pipe should be as small as possible.
• Each meter reduces draft by 5–10%, so the maximum length is 3 m, which is quite enough for a normal kitchen.
• For ventilation and exhaust hoods, a check valve is installed, which ensures their joint operation and prevents the appearance of reverse thrust.

Duct installation

Consider the installation sequence of the ventilation duct for exhaustion with your own hands. What should be done:

• Install the hood according to the attached instructions. The device is easily mounted with your own hands in a kitchen cabinet, under a cabinet or on a wall.
• Lay concealed wiring and plug in a power outlet. It is important to choose a distance to the plate, which should not be less than 60 cm.
• Prepare duct. It will require a nozzle, selected by the size of the duct and ventilation hole. It is impossible to narrow the aluminum pipe and bend at an acute angle, since it can be damaged. Adapters are used to rotate the plastic duct. To make the installation of the hood with your own hands, it is advisable to buy the whole kit, then you do not have to pick up an air duct of a suitable diameter to it.
• Connect the duct to the exhaust pipe with a hose clamp. It is not necessary to seal the joint as it is disassembled for cleaning.
• Lay the pipe to the ventilation window. It is attached to the wall with clamps and dowels. The ventilation duct is assembled using silicone sealant. Pipes connected by adapters should have the same cross section.

Important! The hood and the ventilation channel must be cleaned from fire at least twice a year so that there is no fire.

Conclusion

To increase the efficiency of air purification, an additional ventilation pipe and an extractor hood for the kitchen are installed in the apartment, which you can mount yourself. A complex system of channels must be performed by professionals, otherwise it will take a lot of time and money to rework.