Calculate the power of the heater required to heat the room, taking into account the desired temperature difference according to the formula: V x T x k = kcal / h, where:

V is the volume of the heated room;

T is the difference between the two air temperatures, outside and inside the room;

k is the coefficient of heat loss (or thermal insulation). Varies from 4.0 (for buildings with very poor thermal insulation) to 0.6 (high thermal insulation).

The calculation can also be made using the expanded formula.

Heater power: Qt (kW / h) = (100 W / m2 * S (m2) * K1 * K2 * K3 * K4 * K5 * K6 * K7) / 1000