The Question and Answer Board

[CharleyMike]

found this - - still looking. bored Sunday afternoon

The following formula is used to determine the BTUs needed to temporarily heat a building. This calculation is for an average uninsulated building. Add more BTUs if the building will have a great deal of heat loss from open windows and doors. Reduce the BTUs if the building is well insulated and weathertight.

Cubic Feet To Be Heated x .133 x Desired Temp. Rise = BTUs/Hour

Cubic Feet To Be Heated - Multiply the length x width x height of the area to be heated Desired Temp. Rise - Subtract the lowest expected outside temperature from the desired inside temperature.