The domestic gas furnace provides for heating interior spaces, and always requires a gas-vent to the exterior.
Sizing the furnace per area of heated zones depends primarily on the regional climate assuming that house insulation properties are adequate. In the coldest regions about 70 BTU per hour (BTU/h) are required per square foot of heating zone, in the warmer regions about 35 BTU/h are required per square foot.
The cost to install average gas furnace heating depends upon type, heating capacity, preparation and special needs, and the labor rate.
In the following table the Cost figure is based on average gas furnace heating; and includes transport, material, equipment, and waste.
|Type (heating capacity)||Pros||Cons||Cost|
|Wall (22,000 BTU/h)||Low first cost||Occupies wall space||$795|
|Easy install||Limited area|
|Suspended (36,000 BTU/h)||Easy install||Occupies ceiling space||$1,184|
|Moderate cost||Heat rises|
|Floor (35,000 BTU/h)||Heat rises||Occupies floor space||$1,773|
|Less visible||Structural integration|
|Central (113,000 BTU/h)||Multi zone||Plus duct work||$4,695|
|Higher efficiency||Higher first cost|
Prices range from $795 (wall gas furnace 22,000 BTU/h single zone) to $4,695(central gas furnace 113,000 BTU/h multi zone) and also vary depending on your zipcode:
Local costs have been calculated by accounting for labor and material cost differences across different cities. To get accurate cost estimates, indicate yours: