Mr. Heater MH85QFAV 85,000 BTU
#15 in Forced airFull review
For garages, barns and job sites with fresh air that need strong heat from a 20 lb tank. It is a construction heater, not for living spaces.
Amazon $199.05$199.05
2.6/5
For small garages, sheds and job sites with fresh air that need cheap, simple heat. It is a construction heater, not for living spaces.
- 40,000 BTUHeat output
- Job sites and garagesUse
- None publishedSafety listing
- 1 yearWarranty
Check price at Amazon$121.52
Price checked October 30, 2026. As an Amazon Associate we earn from qualifying purchases.
Pros
- Cheap way into a forced air heater at around $120
- Low 0.68 A draw, easy on a small generator
- Shuts the gas off if the flame goes out, and cuts out if it overheats
- Lifetime warranty on the brass burner nozzle
Cons
- One 40,000 BTU setting, no way to turn it down
- Lit with a piezo button rather than automatic spark
- Construction heater only, for ventilated spaces, not living areas
- No coverage figure or safety listing mark named
How it scores
The rating comes from 6 measured or published factors, each scored 0-100 against fixed reference points for its type. How we rank explains each one.
Specifications
| Model number | LPFA40WH |
|---|---|
| Heating | |
| Heat output | 40,000 BTU |
| Type | Forced air |
| Use | Job sites and garages |
| Thermostat | No |
| Fan | Yes |
| Fuel and power | |
| Fuel | Bulk tank |
| Hose included | Yes |
| Ignition | Push-button piezo |
| Power needed | 120 V outlet |
| Safety | |
| Safety listing | None published |
| Flame-out shutoff | Yes |
| Build | |
| Dimensions | 8.3 x 19.3 x 15.2 in |
| Weight | 14 lb |
| Warranty | 1 year |
Alternatives in this type
Dyna-Glo Delux RMC-FA60DGD
#16 in Forced airFull review
For garages, sheds and job sites with fresh air that want a light 60,000 BTU heater on a 20 lb tank. It is a construction heater, not for living spaces.
Amazon $159.99$159.99
Craftsman CMXEHAO60FAV 60,000 BTU
#17 in Forced airFull review
For a shop or barn that wants a 60,000 BTU torpedo heater that turns down to half power. Keep it in a well-ventilated space.
Amazon $123.27$123.27
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