BTU stands for "British Thermal Unit" and measures the heating or cooling capacity of a furnace or air conditioning unit. Enter your homes square footage to see how many BTU's are required to adequately heat or cool it.
Enter the square footage of your home (or room) and press Go.
This calculator is for estimating capacity only, and does not give exact equipment capacities for your home.
Furnace support blocks raise the equipment up to keep it away from water if the equipment is in a basement that is sometimes wet. Also, a different type of support can be used as vibration isolation dampers when installing equipment in an attic.