Try Amazon Prime free for 30 days
Fast free delivery on heavy items, plus Prime Video, Prime Music and member-only deal prices.
You switch on a little space heater, pick up a wrench and watch your breath still fog over the workbench. Forced air propane heaters for garage use fix that by pushing burner heat across the whole room with a fan instead of warming one spot. After comparing 6 models, the Flame King 60,000 BTU Propane Forced Air Heater is our top pick for its 60,000 BTU output, a rating for up to 1,500 square feet and a tip-over shutoff. For bigger shops, the Vevor 125,000 BTU Propane Forced Air Heater covers up to 3,100 square feet.
Pros
- 60,000 BTU output for outdoor spaces up to 1,500 sq ft
- Runs up to 8 hours on a single 20LB propane tank
- Built-in Auto Piezo ignition with Gas Control Button for heat control
- Includes Safety Fuel Shutoff, Fire Detection System, and Safety Tilt Shutoff
- CSA certified with a 1-Year Manufacturer's Defect Warranty
Cons
- Propane tank sold separately, adding to setup cost and bulk
- Needs open, well-ventilated areas and is not for enclosed indoor use
- Requires a 120-volt wall plug in addition to propane fuel
Pros
- 125000 BTU output for heating up to 3100 sq.ft
- Adjustable heating angle from 30 to 45 degrees
- Overheat protection and flameout protection built in
- Weighs 19.73 lbs with a handle for portability
- Works at altitudes up to 4921 ft with large propane tanks
Cons
- Runs only 3.5 to 4.5 hours on a 20 lb propane tank
- Needs proper ventilation since it burns propane fuel
- At 19.73 lbs it is heavier than small electric space heaters
Pros
- 60000 BTU output heats areas up to 1400 sq ft
- Stepless temperature control with adjustable 30-45 degree angle
- Overheat and flameout protection for added security
- Runs 7-11 hours on a standard 20 lb propane tank
- Weighs only 13.67 lbs with an ergonomic carry handle
Cons
- Requires a separate 20 lb propane tank, not included
- No digital thermostat or remote, only stepless manual control
- Indoor use with a fuel heater still requires proper ventilation
Pros
- 85,000 BTU forced-air output for spaces up to 2,000 sq. ft.
- Smart thermostat control adjustable from 25-95°F with auto shut-off
- Heats spaces in as little as 8 minutes with adjustable heat angle
- Overheat auto-shutoff and gas shutoff protection, CSA certified
- Built-in handle for easier transport and 1-year manufacturer warranty
Cons
- Designed for well-ventilated areas only, not rated for enclosed indoor use
- Requires a 20 lb. or larger propane tank plus included hose and regulator to operate
- Power cord is only 1.5 m (4.9 ft), limiting placement options near outlets
Pros
- 100000 BTU heat output
- Heats areas up to 2400 sq.ft
- 30° to 45° adjustable heating angle
- Overheat and flameout protection
- 18.96 lb weight with large handle
Cons
- Requires a 20 lb propane tank
- 4.4 to 6.2 hour run time per 20 lb tank
- Sized for large spaces, not small rooms
Pros
- 125,000 BTU output for large spaces
- Heats up to 3,125 square feet
- 10 ft hose and regulator included
- Quiet burner technology for forced air operation
- Portable design at 19.67 pounds
Cons
- Built for well ventilated construction sites, barns, warehouses and workshops, not sealed indoor rooms
- No thermostat or temperature control setting listed
- At nearly 20 pounds it is bulkier than small portable heaters
What We Looked For in a Propane Heater for a Garage
A propane heater burns fuel in the same air you breathe, so heat output only matters if the heater also fits your space and your safety habits. These are the points that separated our picks.
- Heat output and coverage: Among our picks, output runs from 60,000 to 125,000 BTU. Rated coverage runs from 1,400 to 3,125 square feet, so measure your floor before you buy. The InoKraft MH85 sits in the middle at 85,000 BTU and is rated for up to 2,000 square feet. Its 25 to 95°F thermostat shuts the burner off at your set temperature and restarts it when the room cools, so it does not burn fuel at full output all afternoon.
- Indoor rating and oxygen depletion sensor: According to the U.S. Consumer Product Safety Commission, unvented gas heaters should have an oxygen depletion sensor that shuts the heater off if oxygen drops too low. None of the 6 heaters we compared lists one, and their makers describe them for well-ventilated spaces such as garages, shops and job sites. The same agency advises choosing a heater certified by a nationally recognized testing laboratory, and two of our picks list CSA certification.
- Ventilation and carbon monoxide: The Centers for Disease Control and Prevention recommends a battery-operated carbon monoxide detector wherever you burn fuel for heat. Keep anything that can burn at least 3 feet away, a distance the CDC, the CPSC and the U.S. Fire Administration all repeat. The U.S. Fire Administration found that portable heaters caused only 3 percent of home heating fires but 41 percent of the fatal ones.
- Fuel type, tank size and run time: All six of our picks burn propane, and most are built around a 20-pound tank. On that tank, run time ranges from about 3.5 hours on the largest burner to as long as 11 hours on the smallest. Two of our picks include a 10-foot hose and regulator, which lets you keep the tank farther from the heat. The CDC also warns to use only the fuel a heater is designed for.
- Ignition and safety shutoffs: The Flame King 60,000 BTU Propane Forced Air Heater lights with a piezo igniter and adds a fuel shutoff, a fire detection system and a tilt shutoff. That tilt shutoff matters in a garage where a heater can get bumped by a creeper or a cart. It is CSA certified, runs its fan from a 120-volt outlet and carries a 1-year defect warranty. Three of our picks use electronic ignition with overheat and flameout protection.
- Size and portability: A heater you can carry with one hand is easier to aim at the bench you are working at. The Vevor 60,000 BTU Propane Forced Air Heater weighs 13.7 pounds and takes up about 0.98 square feet of floor. It still covers up to 1,400 square feet, close to the 1,500 square feet of our top pick. The larger models among our picks weigh about 19 to 19.7 pounds, and the CPSC says any heater should sit on a level, hard, nonflammable surface.
We left out central furnaces and whole-house systems because they need professional installation. Water heaters and heated blankets do a different job, and outdoor-only patio heaters are not rated for enclosed spaces like a garage. If none of our six fits your shop, the next section covers a few close contenders.
Other Propane Heaters Worth Considering
These are other propane heaters we looked at but did not put on our main list.
If you like the thermostat idea but want a slightly different build, the InoKraft MH85M offers 85,000 BTU and is rated for up to 2,000 square feet. That is about 25,000 BTU more than our top pick, and it is CSA certified. It overlaps heavily with a model already on our list, which is why it stayed off.
Need more reach from the same brand? The InoKraft MH125 steps up to 125,000 BTU and up to 3,200 square feet, with a 25 to 95°F thermostat and CSA certification. That is roughly twice the output of our top pick, so it makes sense for a large shop more than a two-bay garage.
Rovsun takes a similar approach with its 120,000 BTU Propane Forced Air Heater, rated for up to 3,000 square feet and CSA certified. It lands just below our alternative pick on coverage, which left it as a close runner-up rather than a list entry.
And if raw output is the whole reason you are shopping, the Mr. Heater 170,000 BTU Propane Forced Air Heater is rated for up to 4,250 square feet. It weighs 20.1 pounds and has an adjustable thermostat. At nearly three times the output of our top pick, it is more heater than most home garages need.
FAQs
How many BTUs does a garage heater need?
It depends on floor area, insulation and how cold it gets outside. Our picks range from 60,000 to 125,000 BTU and carry coverage ratings from 1,400 to 3,125 square feet. A drafty, uninsulated garage usually calls for a heater rated above your actual square footage.
Can I run a forced air propane heater with the garage door closed?
These heaters are meant for well-ventilated spaces, so leave a door or window partly open while one runs. The CDC recommends a battery-operated carbon monoxide detector, and none of our picks lists an oxygen depletion sensor. Keep anything that can burn at least 3 feet away and never cover the heater.
How long does a 20-pound propane tank last in one of these heaters?
Among our picks, rated run time on a 20-pound tank goes from about 3.5 hours to as long as 11 hours. Bigger burners empty a tank faster, so a 125,000 BTU model will need refills far more often than a 60,000 BTU one.
Is it safe to leave a propane heater running when I leave the garage?
No. The U.S. Fire Administration advises turning space heaters off when you leave the room or go to bed. It also counts an estimated 32,200 home heating fires in a recent year, which is reason enough to shut the valve when you walk away.
Sources
- CPSC Offers Tips to Prevent Home Fires From Space Heaters, U.S. Consumer Product Safety Commission. Fire-safety tips and required safety features for space heaters.
- Safety Guidelines: During & After a Winter Storm, Centers for Disease Control and Prevention. Winter heating safety for space heaters, kerosene heaters and carbon monoxide.
- Heating Fire Safety, U.S. Fire Administration. Home heating fire statistics and prevention messages.
Write Your Review
No reviews yet. Be the first to share your experience!