Question: how much does it cost to run a natural gas garage heater?
Answer: 98 and $1.00 (12-month average). The same amount of natural gas contains 100,000 Btu's. A Therm of natural gas will operate a 30,000 Btu wall heater for 3.3 hours, which means that natural gas costs only $. 28 per hour to operate the heater.