Portable propane heaters put out serious warmth without an outlet, which makes them popular for ice-fishing shanties, hunting blinds, job sites, garages, and cold-weather camping. The best-known models run from 1 lb propane cylinders and add safety shutoffs for tip-overs and low oxygen.
We compared heat output, coverage, fuel options, and safety features. One rule applies to all of them: read the manual, follow its ventilation guidance, and use a carbon monoxide detector in any enclosed space.
What to Look For
- BTU output: About 4,000–9,000 BTU suits a small enclosed space; up to 18,000 BTU covers a garage bay or large tent.
- Low-oxygen sensor: An oxygen depletion sensor (ODS) shuts the heater off if oxygen drops. Don't buy an enclosed-space heater without one.
- Tip-over shutoff: Cuts the gas if the heater is knocked over.
- Fuel options: Most run from 1 lb cylinders; a hose and filter let you connect a 20 lb tank for longer runtimes.
- Altitude: Some models shut off above about 7,000 feet because of the oxygen sensor.
Our Top Picks
Mr. Heater Portable Buddy 4,000–9,000 BTU Radiant Heater
The Portable Buddy is the best-known heater in this category: 4,000 to 9,000 BTU for spaces up to about 225 square feet, with tip-over and low-oxygen shutoffs and a piezo igniter.
It runs from a 1 lb cylinder or a 20 lb tank with the right accessories, which makes it flexible for shanties, blinds, and garages.
Mr. Heater Little Buddy 3,800 BTU Heater
The Little Buddy puts out 3,800 BTU from a 1 lb cylinder and is sized for about 95 square feet.
It's the one to grab for a small blind, tent vestibule area, or emergency heat in a single room.
Mr. Heater Big Buddy 4,000–18,000 BTU Heater
The Big Buddy goes up to 18,000 BTU for up to about 450 square feet of enclosed space, with two 1 lb cylinder connections or a hose to a larger tank.
It's the right size for a garage bay, workshop, or large ice house.
Camco Olympian Wave-3 Catalytic Heater
Camco's Wave-3 is a catalytic, flameless heater adjustable from about 1,600 to 3,000 BTU, with a safety shutoff valve. It can be used portably or wall-mounted.
It's popular with RV owners and runs very quietly, though it still needs ventilation like any propane heater.
How We Chose
We prioritized heaters with low-oxygen and tip-over shutoffs, then covered a range of outputs from a compact 3,800 BTU unit to an 18,000 BTU garage heater, plus a flameless catalytic option for RVs.
Bottom Line
The Mr. Heater Portable Buddy is the best all-around portable propane heater. Choose the Little Buddy for small spaces, the Big Buddy for garages, and the Camco Wave-3 if you want quiet, flameless heat in an RV.
Frequently Asked Questions
Is it safe to use a propane heater indoors?
Only models labeled for indoor use, with an oxygen depletion sensor, and only with the ventilation the manual requires. Always run a carbon monoxide detector and never sleep with a heater running unless the manufacturer explicitly allows it.
How long does a 1 lb propane cylinder last?
It depends on the setting. On low, a small heater can run several hours; on high, much less. A hose to a 20 lb tank is far more economical for regular use.
Can I use a propane heater in a tent?
Some people do with indoor-rated heaters, but it carries real risk. Ventilate, keep it away from fabric, use a CO detector, and turn it off before sleeping.
Why does my Buddy heater shut off?
Common causes are low oxygen, high altitude, a tip-over, or a dirty pilot. Check the manual's troubleshooting section.
