How to calculate the power of the boiler

The heating boiler is an excellent tool for maintaining the required temperature in the room in the winter period. Before buying equipment, you should calculate the required power, because The device with insufficient power will not cope with the heating of the room. The use of a boiler with power significantly exceeding the necessary one is also not justified, because It is increasing, even if the device is equipped with an automatic system that regulates fuel consumption.

The easiest way to calculate the power of the boiler - on the area of \u200b\u200bheated premises. It is applicable to typical buildings where the ceiling height does not exceed 3 m. The boiler power is equal to the product of the specific power of the boiler, which falls on 10 sq.m., and the area of \u200b\u200bthe room divided by 10. However, such calculations cannot be applied in each case, t. To. Do not take into account the heat loss of enclosing structures (windows, walls, doors).

Possible problems with the wrong choice of the power of the heating boiler: reduction of the efficiency of the boiler, failures in the operation of automatic equipment, accelerated wear of components, etc. As a result, the life of the boiler decreases significantly. The parameters that are used to correctly calculate the required boiler power:

climatic features of the region;
construction technologies used in building construction (main material, insulation, etc.);
the size of the room (the height of the regiments, the area);
the presence of forced ventilation, etc.

Many buildings are built according to individual projects, therefore, the use of the formula for calculating the capacity of the boiler only on the area of \u200b\u200bthe room is not justified. In this case, the formula is applied, taking into account the projected heat loss. So, the boiler power is equal to the product of the alleged heat loss and the stock ratio, which varies in the range of 15-20%. The reserve coefficient is taken into account in case an abnormally low temperature or reduction of gas pressure.

The formula for calculating possible heat lifting of the building has the following form: TP \u003d OP × RT × kr × 1kW / 860kkal, where TP - heat loss, OP - the size of the room in m³, RT - temperature difference (intransicinary and outer) in ° C, cr - coefficient Dispersion on which the thermal insulation of the building is influenced, and the value "1kW / 860kkal" is used to designate thermal energy. The dispersion coefficient is determined by the type of building:

simple wood design without heat insulation - 3-4;
building with masonry in one brick and simple windows and roofs (low thermal insulation) - 2-2.9;
building with walls in two bricks and a standard roof, in which there are few windows (average heat insulation) - 1-1.9;
the building with increased thermal insulation is 0.6-0.9.

Additionally, the boiler power increases by 25% (the value is multiplied by 1.25), if its two-door use is envisaged, i.e. Heated water for household needs.