Best Propane Space Heaters for RV (2026)

The Portable Buddy is the sensible heater for a small RV because its output matches the volume of the space. A camper interior of 100 to 250 square feet needs only a few thousand BTU to stay warm in mild cold, and the Buddy's 4,000 BTU low setting is closer to that than the 18,000 BTU units here. On high it puts out 9,000 BTU, enough to take the chill off a cold morning. It runs on a single 1 pound propane cylinder, and the maker quotes 5.4 hours on low and 2.4 hours on high.

The trade is cylinder consumption. Two and a half hours on high from a 1 pound cylinder is expensive heat, and you will want the optional Buddy hose and a 20 pound tank for overnight use. Compared with the Big Buddy it has half the high output and no fan, but it is lighter and cheaper. Compared with the Little Buddy at 3,800 BTU, it gives more than twice the high output for a modest size increase.

The safety design uses a pilot oxygen sensor that shuts the heater off if oxygen drops and a tip-over switch. These do not detect carbon monoxide, so a battery CO alarm in the RV is not optional. Vent-free heaters also add moisture, so crack a window. The maker lists indoor use, but check the manual and local rules for restrictions on recreational vehicles. Use only authorized accessories.

The Big Buddy is the upgrade when a camper is large, or when the weather is truly cold. It offers three settings at 4,000, 9,000 and 18,000 BTU and, per Mr. Heater, heats up to about 450 square feet. A built-in fan circulates the warm air, and electronic ignition starts it with a push of a button. With a 20 pound tank and the optional hose, the maker quotes up to 96 hours on low, which makes overnight use easy without swapping cylinders.

The trade is oversizing. At 18,000 BTU it is far more heat than most RV interiors can use, and the fan needs a power source, which adds a small draw. For a 25 foot travel trailer, the low and medium settings are what you will use, so the Big Buddy's value is the fuel economy at those settings with a big tank. Compared with the Portable Buddy, it doubles the high output and adds the fan. Compared with the ProCom 10,000 BTU, it is portable instead of wall-mounted.

The maker states indoor use is not approved in Canada or Massachusetts, so verify your jurisdiction. The Life Safety System includes self-extinguishing protection, a low oxygen shutoff and a tip-over shutdown. It does not detect carbon monoxide, so run a CO alarm. Moisture is a factor, so provide ventilation, and use only the authorized hose and filter.

The Little Buddy is the pick for a van, a camper cab or a sleeping nook rather than a whole camper. It outputs a single setting of 3,800 BTU and heats up to about 95 square feet according to the maker, so it takes the edge off a small bunk space without cooking you. Its 8 inch round stand uses very little floor, and the unit connects directly to a 1 pound propane cylinder.

The limits are plain. With one output and no thermostat, it cannot back off, so you cycle it by hand. Compared with the Portable Buddy, it matches the Buddy's low setting of 4,000 BTU but gives no extra capacity for a cold morning. A 1 pound cylinder holds about 21,600 BTU, so at 3,800 BTU the heater runs roughly five and a half hours, which suits a few hours before bed but not an overnight run without a hose.

It has a tip-over switch and an automatic low oxygen shutoff, and a one-button ignition. It does not have a CO sensor, so a CO alarm is a must. Like all vent-free heaters, it makes moisture, and burning a pound of propane produces about 1.6 pounds of water. Crack a window, and do not sleep with it running in a closed space.

The ProCom blue flame heater is a fixed, thermostat-controlled alternative to the Buddy line. It produces up to 10,000 BTU, uses a thermostat with high, medium and low settings, and mounts on a wall with the included hardware or stands on base feet. It needs no electricity, which is appealing in an RV when the battery is low. The maker lists a 500 square foot heating area, a number that is optimistic for a camper with poor insulation.

The design is a vent-free blue flame heater. That means combustion products, including moisture and trace carbon monoxide, are released into the room, so these units are designed with a pilot oxygen depletion sensor. The listing's claim that the sensor shuts the heater off if carbon monoxide is detected overstates what an ODS does. It senses low oxygen, and a CO alarm is still needed. Compared with the Portable Buddy, it has a thermostat but needs a connection to a propane supply, so it is a more permanent installation.

Vent-free wall heaters are often not permitted in RVs and manufactured homes, so check the label and the manual before you install one. It makes sense in a garage, a shop or a cabin. If you plan to use it in a camper, confirm it is rated for that use and run a CO alarm and fresh air.

The WELLUCK is a cabinet-style heater on wheels, designed for garages, patios and job sites, and it earns a place here as the choice for a large toy hauler or a camper with a garage space. It offers three output settings at 6,000, 12,000 and 18,000 BTU and, with a 20 pound tank and its QCC hose with a built-in regulator, the maker quotes up to 69 hours on the lowest setting.

The minimum setting is the problem for a small RV. Its low of 6,000 BTU is half again higher than the Portable Buddy's 4,000 BTU low, so it will overheat a small camper quickly. Compared with the Big Buddy, it has a lower minimum than 9,000 but no fan, and with wheels it moves around a space. Compared with the Little Buddy, it is a bigger and heavier machine and not meant for a van.

It folds flat to about 15 centimeters for storage and has four swivel casters, two with brakes. A dedicated ignition setting purges air before lighting to prevent a flare-up. It has an oxygen depletion sensor and tip-over protection, but, as with every heater here, it has no CO sensor and the listing says to use it only in well-ventilated spaces. This is a lesser-known brand, so check warranty terms.

This larger ProCom is included to show where the size line sits, not as a camper heater. At 20,000 BTU the maker says it heats up to 950 square feet. That is more than most RV interiors can use by a wide margin: a 30 foot travel trailer is roughly 200 square feet. The unit has the same thermostat, wall-mount or feet layout and pilot oxygen sensor as the 10,000 BTU model.

Its place is a fifth wheel garage, a large toy hauler or a workshop attached to a camper lot. Compared with the Big Buddy's 18,000 BTU top setting, it offers a thermostat and wall mounting but no portability. Compared with the ProCom 10,000 BTU, it doubles output, but a thermostat that cycles a 20,000 BTU burner will make a small space swing between hot and cold.

It is vent-free, so combustion moisture and exhaust enter the space. The same cautions apply: it is not a substitute for the RV's own vented furnace, vent-free wall heaters may not be permitted in recreational vehicles, and a CO alarm and ventilation are essential. Check the label and the manual, and consider a smaller heater for a camper.