Calculation of the number of radiator sections

At the stage of preparation for major repairs and in the process of planning the construction of a new house, it becomes necessary to calculate the number of radiator sections. The results of such calculations allow you to find out the number of batteries that would be enough to provide an apartment or house with sufficient heat even in the coldest weather.

Calculation of the number of heating radiator sections

The calculation procedure can vary depending on many factors. Read the instructions for quick calculation for typical situations, calculation for non-standard rooms, as well as for the order of performing the most detailed and accurate calculations taking into account all possible significant characteristics of the room.

Calculation of the number of heating radiator sections

Recommendations for calculation before starting

To calculate the required quantity yourselfyou must learn the following parameters:

• dimensions of the room for which the calculation is performed;

  How to measure the room

• the power of the entire battery or each of its sections. This information is given in the technical documentation supplied by the heater manufacturer.
  

  Calculation of sections for radiators CONDOR

Heat transfer parameters, battery shape and material of its manufacture - these figures are not taken into account in the calculations.

Important! Do not perform the calculation immediately for the whole house or apartment. Spend a little more time and perform calculations for each room separately. This is the only way to get the most reliable information. At the same time, in the process of calculating the number of battery sections for heating the corner room to the final result, add 20%.The same stock should be thrown from above, if there are interruptions in the heating operation or its efficiency is not enough for a high-quality warm-up.

Standard Calculation of Heating Radiators

Calculation of Heating Radiators

Let's begin the study by considering the most commonly used calculation method. It can hardly be considered the most accurate, but for the simplicity of implementation, it definitely escapes ahead.

Standard calculation of heating radiators

In accordance with this "universal" method for heating 1 m2 of the area of ​​the room you need 100 watts of battery power. In this case, the calculations are limited to one simple formula:

K = S / U * 100

In this formula:

• K - the required number of battery sections for heating the room in question;
• S - the area of ​​this room;
• U - power of one section of the radiator.
  

  Calculation formula for the number of radiator sections

For example, consider the procedure for calculating the required number of battery sections for a room with dimensions of 4x3.5 m. The area of ​​such a room is 14 m2.The manufacturer claims that each section of the battery released by it produces 160 watts of power.

Substitute the values ​​in the above formula and get that to heat our room you need 8,75 radiator sections. We round off, of course, to the big side, i.e.to 9. If the room is angular, add a 20% margin, round again, and we get 11 sections. If there are problems in the heating system, add another 20% to the originally calculated value. It will be about 2. That is, in the sum for heating a 14-meter corner room in conditions of unstable operation of the heating system, 13 battery sections will be needed.

Calculation of aluminum heating radiators

Approximate calculation for standard rooms

Very simple calculation option. It is based on the fact that the size of the heating batteries of mass production is practically the same. If the height of the room is 250 cm( the standard value for most living spaces), then one section of the radiator can heat 1.8 m2 of space.

The room area is 14 m2.For the calculation it is enough to divide the area by the previously mentioned 1.8 m2.The result is 7.8.Round up to 8.

Thus, to warm a 14-meter room with a 2.5-meter ceiling you need to buy a battery for 8 sections.

Important! Do not use this method when calculating a low-power unit( up to 60 W).The error is too large.

Selection of heating radiators for thermal power

Calculation for non-standard rooms

This calculation option is suitable for non-standard rooms with too low or too high ceilings. The basis of the calculation is the statement, according to which for warming up 1 m3 of living space, about 41 watts of battery power is needed. That is, the calculations are performed using a single formula of the following form:

A = Bx 41,

where:

• A - the required number of sections of the heating battery;
• B - room volume. Calculated as the product of the length of the room by its width and height.

For example, consider a room 4 m long, 3.5 m wide and 3 m high. Its volume will be 42 m3.

We will calculate the total demand for this space in thermal energy, multiplying its volume by the 41 watts mentioned earlier. The result is 1722 watts. For example, take a battery, each section of which produces 160 watts of thermal power. The required number of sections is calculated by dividing the total requirement for thermal power by the power value of each section. It will be 10.8.As usual, we round to the nearest larger integer, i.e.up to 11.

Important! If you bought batteries that are not divided into sections, divide the total heat demand by the power of the whole battery( indicated in the accompanying technical documentation).So you will know the right amount of radiators.

It is recommended that round-ups be rounded upwards because manufacturers often indicate a power in the technical documentation that is slightly higher than the actual value.

Calculation of the required number of radiators for heating

The highest possible calculation option

From the above calculations, we saw that none of them is perfectly accurate, becauseEven for the same rooms, the results are a bit, but they are still different.

If you need the maximum accuracy of calculations, use the following method. It takes into account a number of factors that can affect the efficiency of heating and other relevant indicators.

In general, the design formula has the following form:

T = 100 W / m2 * A * B * C * D * E * F * G * S ,

• where T is the total heat required for heating the room in question;
• S - area of ​​the heated room.

The remaining coefficients need more detailed study. So, coefficient A takes into account the glazing peculiarities of the room .

Features of the glazing of the room

The values ​​are as follows:

• 1,27 for rooms, the windows of which are glazed with just two panes;
• 1.0 - for rooms with windows equipped with double-glazed windows;
• 0.85 - if the windows have triple-glazed windows.

Coefficient B takes into account the insulation of the walls of the room .

Features of the insulation of the walls of the room

The dependence is as follows:

• if the insulation is ineffective, the coefficient is assumed to be 1.27;
• with good insulation( for example, if the walls are laid out in 2 bricks or are purposefully insulated with a quality heat insulator), a coefficient of 1.0 is used;
• with a high level of insulation - 0.85.

The C indicates the ratio of the total area of ​​the window openings and the floor surface in the room.

The ratio of the total area of ​​window openings and the floor surface in the room

The dependence looks like this:

• at a ratio of 50%, the coefficient C is assumed to be 1.2;
• if the ratio is 40%, use a factor equal to 1.1;
• at a ratio of 30%, the coefficient value is reduced to 1.0;
• in the case of an even smaller percentage use 0.9( for 20%) and 0.8( for 10%).

The D indicates the average temperature in the coldest period of the year .

Heat distribution in a room using

radiators The dependence looks like this:

• if the temperature is -35 and below, the coefficient is assumed to be 1.5;
• at a temperature of -25 degrees, the value 1.3 is used;
• if the temperature does not fall below -20 degrees, the calculation is carried out with a factor equal to 1.1;
• , residents of regions where the temperature does not fall below -15, should use a factor of 0.9;
• if the temperature in winter does not fall below -10, count with a coefficient of 0.7.

The E is the number of external walls.

Number of external walls

If the external wall is one, use a factor of 1.1.With two walls, increase it to 1.2;at three - up to 1,3;If the outer walls are 4, use a factor of 1.4.

The F takes into account the features of the upstream room .The dependence is as follows:

• if a non-heated attic space is located above, the coefficient is assumed to be 1.0;
• if the attic is heated - 0,9;
• if the neighbor from the top is a heated living room, the coefficient can be reduced to 0.8.

And the last factor of the formula - G - takes into account the height of the room.

Room height

The order is as follows:

• in rooms with 2.5 m high ceilings is calculated using a factor of 1.0;
• if the room has a 3-meter ceiling, the coefficient is increased to 1.05;
• with a ceiling height of 3.5 m, count with a factor of 1.1;
• rooms with a 4-meter ceiling are calculated with a coefficient of 1.15;
• , when calculating the number of sections of the battery for heating a room with a height of 4.5 m, increase the factor to 1.2.

This calculation takes into account almost all the existing nuances and allows you to determine the required number of sections of the heating unit with the least error. In conclusion, you will only have to divide the calculated indicator into the heat transfer of one section of the battery( please specify in the attached passport) and, of course, round off the found number to the nearest whole value upwards.

Calculator for calculating the heating radiator

For your convenience, all these parameters are included in a special calculator for calculating the radiators. It is enough to specify all the requested parameters - and pressing the "CALCULATE" button immediately gives the desired result:

Enter the requested values ​​sequentially or mark the options in the proposed lists

Set the slider to the room area value, m²

100 W / sq.m

How many external walls are there in the room?

one two three four

To which side of the world do external walls look

North, North-East, East South, South-West, West

Indicate the degree of insulation of external walls

External walls are not insulated Average degree of insulation External walls have high-quality insulation

Indicate the averageair temperature in the region in the coldest decade of the year

- 35 ° C and below -25 ° C to -35 ° C to -20 ° C to -15 ° C not lower than -10 ° C

Indicate the ceiling height in the room

before2,7 m 2,8 ÷ 3,0 m 3,1 ÷ 3,5 m 3,6 ÷ 4,0 m more than 4,1 m

What isIs it over the room?

cold attic or unheated and unheated room insulated attic or other room heated room

Indicate the type of installed windows

Conventional wooden frames with double glazing Windows with single-chamber( 2 glass) double-glazed windows Windows with double-chamber( 3 glasses) double-glazed windows or with argon filling

number of windows in the room

Specify the height of the window, m

Specify the width of the window, m

Choose the battery connection diagram

Specify the installation of the radiators

The radiator is located open on the wall or is not covered with a window sill. The radiator is completely covered with a window sill or a shelf. The radiator is installed in a wall niche. The radiator is partially covered with a frontal decorative screen. The radiator is completely covered with a decorative casing

. Below it will be suggested to enter the power rating of one section of the selected radiator model.
If the purpose of the calculation is to determine the total heating power needed to heat the room( for example, to select non-separable radiators) then leave the field blank

Enter the heat rating of one section of the selected radiator model

Energy saving tips

Tips for energy saving

Successful calculations!

Video - Calculation of the number of heating radiator sections