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| Spec | Fahrenheat FUH54 5,000W Ceiling-Mount Unit Heater | Mr. Heater Big Buddy 18,000 BTU (MH18B, no fan) |
|---|---|---|
| Photo |  |  |
| Our score | SCORE6.4 / 10 | SCORE7.0 / 10 |
| Our take | For a garage you heat often: a published 45-135°F thermostat, field-set wattage, a published 208V rating and 5-year element coverage. Owners report it cycling every minute or two, and everything but the elements carries 1 year from installation. | A good heater for blinds, shelters, camp and outages on 1 lb cylinders, with a low-oxygen shutoff and tip-over switch. A closed garage isn't on its manual's indoor list, and there's no thermostat or fan. |
| Type | 240V garage heater | Portable propane |
| Max heat output | 17,065 BTU/h | 18,000 BTU/h |
| Electric rating | 5,000 W | n/a |
| Fuel / power | 240V electric | Propane |
| Indoor use per manual | Indoor; not damp or wet locations | Recreational enclosures + emergency, 1 lb only |
| Thermostat | Yes | No |
| Warranty | 1 yr | n/a |
| Watch out for | Warranty is void if supply voltage runs more than 5% over nameplate or the heater is improperly wired. Not for drywall or paint dry-out; the dust damages the heater. | The Massachusetts and Canada version (F274806) ships with a manual that says For Outdoor Use Only; check for F274805 before using it indoors. Not for use in a dwelling home in California, per the US manual. The low-oxygen shutoff does not detect carbon monoxide; run a battery CO alarm listed to UL 2034 wherever the heater runs. Using third-party attachments or cooking on it voids the warranty. |
| More | Model detailsOur full reviewView on Amazon → | Model detailsOur full reviewView on Amazon → |