How to make a chimney?

Every good builder knows that costsfuel resources, the ratio of produced and lost heat, a measure of indoor air purity and fire safety of housing, directly depend on the correct design and construction of the chimney. What is just for the people of the construction profession is completely alien to the average person, because knowing how to make a chimney, you can, at least, properly monitor the installation process of the structure.

The main parts of the chimney

The main characterizing factor of the chimneyis its material. Modern builders for installing a chimney increasingly use acid-proof stainless steel containing molybdenum. However, for the furnace and fireplace, whose flue gases do not contain increased acidity, you can apply the same brick.

For a good chimney, the optimum shape is a cylinder. After all, the more barriers (bends) are on the way out of the smoke, the more it is more difficult for him to pass, and the soot on the walls will be deposited more.

The size of the output is always determined by the dataheight and diameter of the structure. The first figure is calculated taking into account the capacity of the equipment, the indicated width of the outlet, and the nature and number of barriers on the way out of the smoke. The second indicator (height) is calculated taking into account building norms, taking into account the height of the building, the typical roof characteristic and the size of adjacent buildings (the scheme is used). By making a chimney with your own hands, and designing a structure, it is important to adhere to the requirements for horizontal sections of the chimney, the length of which should not exceed 1 m. Otherwise, the movement of warm air, which moves vertically and not horizontally, will be disturbed. In addition, this will cause a bad thrust and contribute to increasing the amount of soot deposits on a given site.

Tip: if the diameter of the output of the boiler or the fireplace insert does not coincide with the diameter of the chimney, then, most often, the reduction adapter is used. The joint of the equipment with the chimney is treated with a special sealant. Further assembly of the chimney by means of pipes is carried out along the course of the condensate, expanding to the top. Such a cunning in the design will not allow the condensate to escape to the outer wall of the pipe.

Brick chimney

A chimney made of bricks is built in accordance withapproved project. After all, each individual fireplace or stove requires its own calculation, which is prescribed clearly on the layers. Already knowing how to properly make a chimney out of pipes, the same requirements apply to laying a brick exit: minimizing various roughness on internal walls, and monitoring the tightness of the building.

When the house already has an old brick chimney, andthere is a desire to use it for a gas boiler, then you need to hold the sleeve. It's simple. In the old chimney fix the pipe of acid-resistant steel, while leaving a technical gap between the masonry and the new pipe. In addition, to make a chimney in the house, very often use tees. For their application it is necessary to take into account the angle of retraction. It is not superfluous to provide and auditing doors. One of the main requirements for gas boilers is the construction of a condensate-tap. Such a design can be both a vertical condensate collector and a tee with a watering can. It is very important that the water vapor withdrawal be organized competently.

And, having insulated the chimney, you will provide bothits security, and the safety of the house. Having made the same insulation, you not only reduce the formation of condensate, but also contribute to an increase in the rate of heating the pipe. Remember that by laying the chimney through the floors, you must comply with all fire regulations that directly depend on the quality of the material of the overlap and the installed pipe temperature.

How to make a chimney for a boiler

To properly mount the chimney for a gas column or boiler, you must always comply with these requirements:

• The construction must comply with the SNiP.
• Have your own channel. Sometimes it is permissible to connect two devices to one channel, but at a distance not less than 7.5 m.
• The chimney must necessarily be airtight. The leakage of carbon monoxide is completely unacceptable (remember, the brickwork of the brick chimney is not a guarantee of the reliability of gas insulation).
• The reinforced structure must be resistant tocondensate. New high-efficiency boilers are capable of producing 1-3 thousand liters of condensate per year. Due to the low temperature of the exhaust gases, which rarely exceeds 100 ° C, the condensate can not evaporate, which is why it flows down the walls of the chimney, thereby penetrating into the brick and leading to its destruction.
• Follow the thrust. The ideal cross-section for any exhaust duct is a round shape. The rough or uneven internal surface of the pipe is the reason for the deterioration of the thrust. It is also important that the cross-section of the channel is not less than the cross-section of the gas pipe of the connected device. The channel must always be warm (less condensation will be collected).
• The chimney for boilers should always go straight to the sky. No visors, no other covers are installed.

The note: the installation of chimneys for solid fuel boilers, baths, saunas, gas columns and boilers is practically identical to the above-described actions. Completely different from other types of chimneys is a coaxial chimney, which is a completely closed system (air does not participate in the operation of the boiler), and the release and airflow does not necessarily occur through a single chimney, divided into two parts. There is a design with separate pipes. Most often coaxial chimneys are horizontal structures, however, if necessary, you can make a vertical tap.