How much natural gas does your furnace use per hour?

Answer 1

Look at the tag on the inside of the furnace that denotes it`s capacity in btu per hour or btuh. Where it says Rated input which is what has to be put in (fuel) to get the Rated output (heat). That btu number can be anything from say 150,000 down to50,000 or even less. But that is the # you want, then divide that # by 1040 and that is your answer in cubic feet of gas used per hour of run time. Natural gas contains 1040 btu per cubic foot when burned so that is where that # came from.

Answer 2

The natural gas consumption of a furnace can vary widely depending on factors like its efficiency, size, and the heating demand. On average, a residential gas furnace can consume around 50,000-150,000 BTUs per hour. It's best to refer to the furnace's specifications or consult with a professional to determine the specific usage.