I'm hoping to install a tankless water heater, and I'm trying to figure out if my current gas meter can handle it. So I'm trying to figure out how much gas my furnace uses.
It's a Goodman GMH950703BXAD. The label says the max temp rise is 69,000 BTU/hour, and the EnergyGuide sticker says it's 98% efficient. Am I right in thinking this means a max gas usage of about 70,500 BTU? (69000 / 98) * 100 = 70408
In response to comments about pipe size, it's 1" pipe coming off the meter. This is about 30', then it reduces to 3/4" at an old unused T, and it's about 25' of 3/4". The furnace and water heater are both at the end of this. So I've already got the required 3/4" gas supply, and it wouldn't be out of the question to extend the 1" line the entire distance if that would help.