you need

- - Roulette;
- - reference data on heat transfer resistance of various materials;
- - Calculator.

Guide

1

Measure the dimensions of the walls, windows, floors and ceilings, and calculate the area of these surfaces.The area is generally calculated by multiplying the length by the width.It is not necessary to carry out calculations for interior walls and doors.

2

determine the thickness of the walls and the material from which they are made.

3

Calculate the thermal resistance of the walls.To do this, divide the temperature difference between indoors and outdoors in the heat resistance of the material of construction of the wall.As the temperature outside is recommended to use the average temperature of the col
dest week of the year.

4

Calculate the heat loss for each of the surfaces, which multiply the surface area by a factor of thermal resistance of the surface.

5

Put obtained values and get the value for the heat in your room.

**Power****gas boiler**exceed this value. 6

If you have no data on heat transfer of certain materials or you have limited time to carry out the calculations, use the following formula: for heating every 10 square meters of space with a ceiling height of 2.5 meters will be used 1 kilowatt of power

**boiler**.In the case of**boiler to heat water into account when calculating that this will be used 25% of the power boiler****.** Note

Do not try to compensate for the loss of heat in the room only through the purchase of a more powerful boiler.First prevent the natural heat loss: insulate the walls, replace the normal windows to double-glazed windows, which retain heat twice as effectively.

Helpful Hint

To find the coefficient of thermal resistance, you can use any directory data on heat supply.The directories are typically specified data for the heat transfer coefficient, respectively, the coefficient of heat transfer resistance is the reciprocal of.