The average-sized RV furnace will burn about 1/3 of a gallon of propane while running continuously for an hour. Based on this estimate, a gallon of propane = 3 hours of continuous RV furnace use.

Do RV heaters run on propane?

While your RV’s furnace may utilize electricity to ignite or to control the thermostat, almost all onboard RV furnaces are primarily run on liquid propane — which is a pretty efficient fuel source, all things considered.

How long will an RV heater run on propane?

It might only need to run for a total of 8 minutes each hour to keep you warm. That means the furnace will kick on for 2 minutes about every 15 minutes. And at that rate, one gallon of propane will heat your RV for about 24 hours.