Nearly all RVs only have a propane only furnace for heat.
That's why many take electric heaters when hookups are available.
They supplement the propane furnace and help save propane.
Some a/c's have heat strips or they can be added. They are 120v AC.
Remember, the propane furnace uses 12v DC battery power to ignite and run the fan.
and Zoe the Wonder Dog(R.I.P.)
'07 Roo 23SS pushing an '07 Chevy Avalanche
Equalizer WDH and Prodigy BC