How many BTU does it take to heat a cubic foot of air?
How many BTU does it take to heat a cubic foot of air? It takes 0.24 BTU of heat to change the temperature of one pound of air by one degree F. The 1.08 factor also contains the specific density of air (0.075 pounds per cubic foot). The air is measured in CFM, yet the specific heat is per pound of air. How many BTUs do you need to heat a room? For example, a 300 square foot room typically requires 7,000 BTUs to maintain a comfortable temperature, while a 1,000 square foot room requires 18,000 BTUs. (desired temperature change)...