RV heat pumps
Many RV air conditioners double as heat pumps — efficient electric heat for mild weather, with the propane furnace for the cold.
How an RV heat pump works
An RV heat pump is usually built into the roof-mounted AC unit: a reversing valve lets the same unit run in reverse to warm the cabin. Because it moves heat instead of burning propane, it is cheap to run on shore power (a 30/50-amp hookup) and produces no fumes or moisture.
Cold-weather limits
RV heat pumps lose capacity quickly as it gets cold and typically stop heating effectively below about 35–40°F — and they need 120V shore power (they draw too much for most inverters/batteries). They are best for cool evenings, not winter camping.
Heat pump or furnace?
Use the heat pump when you have shore power and it is above ~40°F — it is cheaper and quieter. Use the propane furnace in real cold, when boondocking without hookups, or when you need to heat enclosed tanks/basement areas the heat pump cannot reach.
Frequently asked questions
Do RV air conditioners have a heat pump?
Many do — a reversing valve lets the rooftop AC run in reverse to heat the cabin. Check your unit, as it is a common option.
How cold can an RV heat pump work?
Typically down to about 35–40°F before it loses effectiveness; below that, use the propane furnace.
Can I run an RV heat pump on battery?
Generally no — it draws too much power. RV heat pumps need 120V shore power or a generator.
Related
Sources & further reading
Educational guide, reviewed against US DOE & ENERGY STAR guidance and updated June 2026. Estimates only — not a substitute for a professional assessment or Manual J load calculation.