Originally Posted by michael.mcilrath
Thank you for all the replies. I will check the gas when I get home and wasn’t aware it did run in the gas. I am on shore power but can’t answer if it runs on both like my fridge does. I do have two tanks with a switch over and all that will be checked at lunch. Thank you again!
The furnace burns LP (propane) only to make heat.
Some (not all) A/C units have an electric element (heat strip) or utilize a heat pump system to make supplemental heat but the furnace is strictly propane for heat AND 12v to operate the blower and the controls.
The furnace (and the R/V) is built this way so if you have no shore power (boondocking) you are still able to have heat. (provided you don't run out of LP or battery power)
Many folks use an electric space heater to supplement the furnace when shore power is available.
Your furnace is one of the largest propane users in your R/V.
In cooler/cold weather it can deplete a 20# tank quickly.