I just got my propane bill and was surprised as to how much I used- 263 gallons for 3 months. I'm not home much and keep thermostat low. I have an underground tank and furnace 5 years old. Goodman GMNT-120-5.
The label on the furnace says energy efficient, but I don't see it especially after this bill.
Are Goodmans a reliable brand?
How can I determine BTU usage per gallon of propane- hours furnace is on = gallons used conversion?