How many square feet will a 75000 BTU furnace heat?
A 75,000 BTU heater can heat a room of between 1,900 and 3,700 square feet in a cold climate if there is little to no insulation. In more temperate climates the heater fares better, heating an uninsulated room of any size from 2,400 to 4,600 square feet.
What size furnace do I need for a 2200 square-foot house?
House Size (Sq Ft): Furnace Size (in BTUs):
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2000 sq ft home 90,000 BTU furnace
2100 sq ft home 94,500 BTU furnace
2200 sq ft home 99,000 BTU furnace
2300 sq ft home 103,500 BTU furnace