Chimney for the gas column: what diameter and air duct to choose, coaxial chimney for the gas column

The most optimal choice for obtaining hot water in a house or apartment is called a gas column. But one of the conditions for installing most models of such equipment is the need for a chimney. Therefore, thinking about buying a column, the user should learn more about the rules for installing chimneys, as well as about possible alternatives to such a kind of flue gas outlet.

Chimneys for gas heaters are classified according to the material from which they are made. Allocate:

1. Corrugated flexible ducts. Inside such pipes there is a wire spiral, and the pipe itself is made of aluminum foil. The advantage of this chimney is the possibility of bending at any angle and changing the length with the help of metallic scotch tape.
2. Aluminum exhaust pipes. Their advantages are low weight, availability, no condensation inside the chimney. However, in winter, without such insulation, such pipes can icing.
3. Chimneys made of galvanized steel. They have low weight and quite high resistance to corrosion. A steel chimney is also important to insulate during the cold season.
4. Sandwich chimneys. Their design is a single pipe located inside the second, and between their walls is a non-combustible heater( often mineral wool) to prevent the formation of condensation. A similar chimney is called durable and reliable. It is often recommended for installation in a private house, when a chimney must be laid through the roof and the ceiling( especially if they are made of combustible materials).

This is a modern and popular nowadays version of the chimney, which is used for turbine columns characterized by the presence of a closed combustion chamber. Its construction is represented by a pipe in the pipe, while smoke is discharged from the column through the central pipe, and fresh air from the street enters the combustion chamber of the apparatus through the gap between the outer and inner tubes.

A similar design makes it possible to make the exhaust pipe smaller and increase the efficiency of the device. In addition, the column with this version of the chimney will not burn oxygen in the air of the room, which usually occurs when the combustion chamber is open. Stopping the choice on the turbocharged column does not need to worry about sufficient ventilation of the room, but it is important to pay attention to the choice of the diameter of the chimney. It is necessary that its diameter is not less than the outlet of the column.

Diameter selection is performed taking into account the performance of the column, that is, based on its power. Practically for all heaters used in everyday life, a pipe diameter of 11 or 13 cm is needed. For devices with a power of up to 20 kW providing a single point for water, a pipe with a diameter of 110 mm is usually chosen, and for a column with a power of more than 21 kW, from which wateris assigned to 2-3 cranes, pipes of diameter 130 mm are required.

To connect a standard gas column in a city apartment, there should be a stationary channel in the house to divert smoke. In most modern buildings such ventilation ducts are laid in the walls, so bringing a chimney from the column to them is no problem. However, in many buildings of the last century there are no such channels, so the usual column will not be installed in them. In this case, you can choose the turbo model.

Other features of the installation of the chimney in the apartments are such nuances:

• The chimney inside must be smooth and without any constrictions.
• Most often it is installed vertically. Not more than 3 bends are allowed.
• The pipe must be well sealed to prevent combustion products from entering residential areas.

If a chimney was thought about during the construction phase of a building, the best choice would be to build a vertical brick mine, inside of which a steel or asbestos pipe can be located. It is important that the gas column and the heating system have different mines for removing smoke.

If the building is already constructed, the most suitable variant of the chimney is the insulated steel pipe. It can be either attached to one of the outer walls, and installed inside the building through its floors and roof.

The following are the other nuances of the chimney installation in the house:

• The material and construction of the chimney as well as the installation location must comply with the regulations in force.
• The chimney must be provided with easy access, so that if necessary, you can quickly eliminate possible malfunctions.
• When mounting the chimney in a house vertically, it is important not to allow a significant deviation of the pipe - it should not deviate more than 1 meter along the entire structure.
• The end of the flue pipe must protrude above the roof for a minimum of 40-50 cm.

The installation of a flue during the installation of a gas column includes the following:

1. Evaluation of the conditions for installation work.
2. Choosing the right chimney option.
3. Installation of the chimney section at the point of its connection to the gas column.
4. Installation of a chimney pipe inside the house or on an external wall( for installation in a private house).
5. Pulling the pipe through the hole into the street( if a coaxial chimney is installed).
6. Traction control.

asphyxiant columns These days, in connection with the spread of turbocharged columns, they are called such machines, since they do not need a special chimney, and their coaxial chimney is led out through the wall. However, there are also columns that lead the combustion products to the room in which they are installed. As a rule, these are low-power models with low performance. An example of such a column is the Neva 3001, whose power is 9 kW, and the productivity is only 2.6 liters per minute.