When installing and replacing radiators, the question usually arises: how correctly to calculate the number of sections of radiators, so that the apartment was cozy and warm even in the coldest season? Make the calculation yourself is not difficult, you just need to know the parameters of the room and the power of the batteries of the selected type. For corner rooms and rooms with ceilings above 3 meters or panoramic windows, the calculation is somewhat different. Let's consider all calculation methods.
Calculation of the number of heating radiator sections
Rooms with standard ceiling heights
The number of radiator sections for a typical house is calculated based on the area of the rooms. The area of a room in a typical building is calculated by multiplying the length of the room by its width. To heat 1 square meter, 100 watts of heater power is required, and to calculate the total power, multiply the obtained area by 100 W.The resulting value indicates the total capacity of the heater. In the documentation for the radiator, the thermal power of one section is usually indicated. To determine the number of sections, you need to divide the total power by this value and round the result upwards.
Example calculation:
Room with a width of 3.5 meters and a length of 4 meters, with the usual height of ceilings. The power of one section of the radiator is 160 W.It is necessary to find the number of sections.
- Determine the area of the room, multiplying its length by the width: 3.5 · 4 = 14 m2.
- We find the total capacity of the heaters 14 · 100 = 1400 W.
- Find the number of sections: 1400/160 = 8,75.We round to the side of a larger value and get 9 sections.
You can also use the table:
Table for calculating the number of radiators on M2
For rooms located at the end of the building, the estimated number of radiators must be increased by 20%.
Rooms with a ceiling height of more than 3 meters
Calculation of the number of sections of radiators for rooms with roomsThe ceiling height of more than three meters is based on the volume of the room. The volume is the area multiplied by the height of the ceilings. To heat 1 cubic meter of space, 40 watts of heat output of the heater is required, and its total power is calculated by multiplying the room volume by 40 W.To determine the number of sections, this value must be divided by the capacity of one section according to the passport.
Example calculation:
Room with a width of 3.5 meters and a length of 4 meters, with a ceiling height of 3.5 m. The power of one section of the radiator is 160 W.It is necessary to find the number of radiator sections.
- Find the area of the room, multiplying its length by the width: 3.5 · 4 = 14 m2.
- Find the volume of the room, multiplying the area by the height of ceilings: 14 · 3,5 = 49 m3.
- We find the total power of the radiator: 49 · 40 = 1960 W.
- We find the number of sections: 1960/160 = 12.25.We round up and get 13 sections.
You can also use the table:
As in the previous case, for a corner room, this figure should be multiplied by 1.2.Also it is necessary to increase the number of sections in case the room has one of the following factors:
- Located in a paneled or poorly insulated house;
- Located on the first or last floor;
- Has more than one window;
- Located next to unheated rooms.
In this case, the obtained value must be multiplied by a factor of 1.1 for each of the factors.
Calculation example:
Corner room with a width of 3.5 meters and a length of 4 meters, with a ceiling height of 3.5 m. Located in a panel house, on the first floor, has two windows. The power of one section of the radiator is 160 W.It is necessary to find the number of radiator sections.
- Find the area of the room, multiplying its length by the width: 3.5 · 4 = 14 m2.
- Find the volume of the room, multiplying the area by the height of ceilings: 14 · 3,5 = 49 m3.
- We find the total power of the radiator: 49 · 40 = 1960 W.
- Find the number of sections: 1960/160 = 12.25.We round up and get 13 sections.
- Multiply the received quantity by the coefficients:
Corner room - coefficient 1,2;
Panel house - coefficient 1.1;
Two windows - a factor of 1.1;
The first floor is a coefficient of 1.1.
Thus, we get: 13 · 1,2 · 1,1 · 1,1 · 1,1 = 20,76 sections. We round them up to a larger whole number - 21 section of the radiators.
When calculating, it should be borne in mind that different types of radiators have different thermal capacities. When selecting the number of radiator sections, it is necessary to use the values that correspond to the selected type of batteries.
Heating radiator
In order to ensure maximum heat dissipation from radiators, it is necessary to install them in accordance with the manufacturer's recommendations, observing all the distances specified in the passport. This contributes to a better distribution of convective currents and reduces heat loss.
