Heating Power Calculation

V x ΔT x K x 3.97 = BTUs

V = The cubic capacity or volume of the structure in cubic metres
ΔT = The difference between the Internal and External air temperature
K = The structure’s Insulation Coefficient

Example

The client requests that a warehouse of 20m x 10m x 4m is kept at a temperature of 20°C: it is a steel clad structure with an Insulation Coefficient of 1.9, and with an expected outside night time temperature of -10°C

Therefore, with the volume at 800m³, the temperature differential at 30°C and the Insulation Coefficient at 1.9, the formula would be as follows:

800 x 30 x 1.9 x 3.97 = 181,032 BTUs