People build their own houses and provide heating, or, living in an apartment or an old house, replace the heating systems that have become unusable with new ones. When buying radiators at home, everyone asks a completely natural question: how many, in fact, radiator sections do you need to take for each room?
Quite high requirements are imposed on modern radiators, and the calculation of the number of sections of heating radiators is as follows.
Photo of heating radiators
Find out in advance the exact area that you are going to heat with this radiator. Usually, one square meter of area is taken as a standard unit of calculation, for which 110 watts is considered sufficient. That is, for example, for a 15-meter room, 1650 watts are required.
According to the data in the radiator passport, we find out what is the thermal power of each section with a thermal heater heated to 70 degrees. This indicator can range from 130 to 195 watts. For example, for the radiator you have chosen, the section power is 180 watts. Divide 1650 by this value and get 9 penny sections.
Now we decide whether we should take 9 sections or 10?
It is impossible to give an exact answer to this question without specifying the details. The answer can be obtained by adding to the standard calculations the individual, so to speak, features of your layout, such as the size of the glazed surfaces, the height of the ceilings, the cold basement or attic with which the room is in contact, the type of wall insulation (mineral wool, polystyrene, etc.).
If triple-glazed windows are installed on the windows, and the rooms above and below the room are heated, then, of course, you need to take 9 sections. And, in general, the better the house is insulated, the less heat loss and the less radiator sections will be required.
The calculation also takes into account where the radiator is located. If it completely covers the screen, then the loss of heat transfer will be up to a quarter of the numbers you got in your calculations.
The presence of a window sill above the radiator can be ignored. It takes only 3% of the heat. A radiator installed in a niche will lose a little more – about 7%.
Video on calculating the number of sections in heating radiators