how much does a gas heater cost to run
1 A 30,000 BTU vent free natural gas wall heater can cost $100 to $450 and can provide heat of up to a 1,000 square foot space. 2  A 6,000 BTU LP gas wall heater will provide sufficient heat for a moderate room.3  This is an ideal source for primary or secondary source of heating. 4  These can be purchased from $250 to $460. A 30,000 BTU vent free natural gas wall heater can cost $100 to $450 and can provide heat of up to a 1,000 square foot space. 2  A 6,000 BTU LP gas wall heater will provide sufficient heat for a moderate room.