1. Dreo Atom One
9.2
/ 10
Compact, quiet, a real thermostat with ECO cycling, a 12-hour timer, and tip-over shutoff — the right small heater for a camper's tight quarters and bumpy floors.
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~$45 typical price
Buy on AmazonUse-case guide · 2026
Best heater for an RV or Camper
RV heating splits by where the power comes from. On shore power, a small ceramic heater with a thermostat beats running the propane furnace all night. Off-grid, a portable propane heater is the common choice — with strict ventilation and a CO alarm, because you're burning fuel in a very small sealed box. And heated bedding lets you sleep warm either way on a fraction of the power.
What this space needs
Heater size needed
750–1,500W on shore power; 4,000–9,000 BTU propane off-grid
Type that fits best
Small ceramic with thermostat (hookups) · Buddy heater (boondocking)
- ▸A 30A RV hookup can run one 1,500W heater comfortably; watch your total load if the water heater, microwave, or a second heater is on at the same time.
- ▸Propane indoors means ventilation: a cracked roof vent and a window, a working CO alarm, and never while sleeping. Read the heater's manual for the required fresh-air opening.
- ▸A heated blanket or pad draws little enough to run on an inverter and makes a 50°F cabin perfectly sleepable.
Not sure what size you need? Run your room through the heater sizing tool →
Our picks
4,000/9,000 BTU of propane heat with an oxygen-depletion sensor and tip-over switch — the standard boondocking heater, used only with ventilation and a CO alarm.
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~$100 typical price
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Sleep warm at 50°F inside without running any heater all night; a heated blanket sips power and works off a modest inverter.
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~$46 typical price
Buy on AmazonBefore you buy
- ▸Secure any heater so it can't tip or slide while parked; never run a portable heater while driving.
- ▸RV outlets and wiring are lighter than a house's — one 1,500W heater per circuit, never an extension cord or power strip.
- ▸CO alarm, always, and test it before the trip. Propane heaters also consume oxygen; the ODS protects against that but not against a dirty burner producing CO.
- ▸Keep heaters three feet from bedding, curtains, and the dinette cushions — in a camper, that's most of the space, so placement matters.
Frequently asked questions
Can I use a Mr. Heater Buddy inside an RV?
Many RVers do, following the manual: adequate ventilation (a cracked window and roof vent), a working CO alarm, never while sleeping, and never in a space smaller than the heater's minimum. It's designed as an indoor-rated heater with an oxygen-depletion sensor, but the ventilation requirement isn't optional.
Will a space heater trip my RV breaker?
A 1,500W heater is 12.5 amps on a 120V circuit — fine alone on a 30A hookup, but combined with an electric water heater, microwave, or a second heater it will overload the circuit. Run one heater, on its own outlet, and watch total load.