How to calculate the number of radiator sections. How to calculate the number of radiator sections per room

Every home owner in a heating system faces important questions. What kind of radiator to choose? How to calculate the number of radiator sections? If the house is built for you by professional staff, they will help to correctly perform the calculations, so that the distribution of heating batteries in the building was rational. However, this procedure can be carried out independently. The formulas necessary for this are found in the article below.

Types of radiators

To date, there are such types of batteries for heating: bimetallic, steel, aluminum and cast iron. Also radiators are divided into panel, sectional, convector, tubular, and also design radiators. Their choice depends on the coolant, the technical capabilities of the heating system and the financial capacity of the owner of the house. How to calculate the number of radiator sections per room? This does not depend on the type of heating battery. In this case, only one indicator is taken into account: radiator power.

Methods of calculation

In order for the heating system in the room to work effectively and in the winter it was warm and comfortable, you need to carefully calculate the number of sections of the radiator. For this, the following calculation methods are used:

• Standard - is based on the SNIP position, according to which heating 1m ² will require a power of 100 watts. The calculation is carried out using the formula: S x 100 / P, where P is the separation power, S is the area of the selected room.
• Approximate - for heating 1.8 m ² apartments with ceilings, a height of 2.5 m, you will need one radiator section.
• The volumetric method - the heating power of 41 W is taken to 1 m ³ . The width, height and length of the room are taken into account.

How many radiators will be needed for the whole house?

How to calculate the number of radiator sections for an apartment or a house? A calculation is made for each room separately. According to the standard, the thermal power per 1m ³ of the room volume, having one door, a window and an external wall, is considered to be 41W.

If the house or apartment is "cold", with thin walls, have many windows, the attic is not insulated in the house , and the apartment is on the first or last floor, then 47 W per 1 m ³ , not 41 W, is needed for their heating. For a house built of modern materials using different insulation for walls, floors, ceilings, having metal-plastic windows. You can take 30 watts.

To replace cast iron radiators, there is the simplest method of calculation: you need to multiply their number by 150 W, the resulting number - the power of new devices. Buying aluminum or bimetal batteries for replacement, the calculation is carried out in the ratio: one edge of cast iron to one aluminum.

Rules for calculating the number of branches

How to calculate the number of radiator sections per room? To do this, you must follow the following rules:

• The increase in the power of the radiator occurs: if the room is face-to-face and has one window - by 20%; With two windows - by 30%; Windows facing north also require an increase of 10%; Installation of battery under the window - 5%; Closing the heater with a decorative screen - by 15%.
• The power needed for heating can be calculated by multiplying the room area size (in m ² ) by 100 W.

Tips for installing radiators

In the product passport, the manufacturer indicates the specific power, which makes it possible to calculate the proper number of sections. Do not forget that the heat transfer affects the power of a separate section, and not the size of the radiator. Therefore, placing and setting in the room of several small devices is more effective than setting one large. The incoming heat from different sides will warm it evenly.

Calculation of the number of bimetallic battery compartments

How to reliably calculate the number of bimetallic radiator sections per room? To do this, you need the following input data:

• Dimensions of the room and the number of windows in it.
• The location of a certain room.
• The presence of unclosed openings, arches and doors.
• The heat output of each section, indicated by the manufacturer in the passport.

Stages of calculations

How to calculate the number of radiator sections, if all the necessary data is recorded? To do this, determine the area, calculating in meters the derivatives of the width and height of the room. Using the formula S = L × W, calculate the joint area of adjacent rooms if they have unclosed openings or arches.

Next, calculate the total thermal power of the batteries (P = S × 100), applying a power of 100 W for heating one m ² . The proper number of sections (n = P / Pc) is then calculated by dividing the total heat output by the heat transfer of one section, indicated in the passport.

Depending on the location of the room, the calculation of the required number of branches of the bimetallic device is made taking into account the correction factors: 1.3 - for the angular; Use a factor of 1.1 - for the first and last floors; 1,2 - used for two windows; 1,5 - three or more windows.

Example:

Calculation of battery sections in the end room, located on the first floor of the house and having 2 windows. Dimensions of the room 5 x 5 m. Heat transfer of one section 190 W.

• Calculate the area of the room: S = 5 x 5 = 25 m ² .
• We calculate the thermal power in general: P = 25 x 100 = 2500 W.
• We calculate the necessary sections: n = 2500/190 = 13.6. We round up, we get 14. We take into account the correction factors n = 14 x 1.3 x 1.2 x 1.1 = 24.024.
• The sections are divided into two batteries and install them under the windows.

We hope that the information presented in the article will tell how to calculate the number of radiator sections for a house. To do this, use the formulas and perform a relatively accurate calculation. It is important to select the correct power for the section that fits your heating system.

If you can not calculate the required number of batteries for your home by yourself, it's best to ask for help from specialists. They will perform a competent calculation, taking into account all factors affecting the efficiency of the installed heating appliances, which will provide heat in the house during the cold period.