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| Spec | Mr. Heater Big Buddy 18,000 BTU (MH18B, no fan) | Comfort Zone CZ220 5,000W Ceiling-Mount Garage Heater |
|---|---|---|
| Photo |  |  |
| Our score | SCORE7.0 / 10 | SCORE7.0 / 10 |
| Our take | 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. | Our default for a one- or two-car garage heated in sessions: 5,000 W with 4,000 and 3,000 W steps, hung from a joist. The knob thermostat has no published range, and like every electric heater here it can't share the garage with gas cans or paint. |
| Type | Portable propane | 240V garage heater |
| Max heat output | 18,000 BTU/h | 17,060 BTU/h |
| Electric rating | n/a | 5,000 W |
| Fuel / power | Propane | 240V electric |
| Indoor use per manual | Recreational enclosures + emergency, 1 lb only | Indoor, dry locations only |
| Thermostat | No | Yes |
| Warranty | n/a | 1 yr |
| Watch out for | 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. | 1-year warranty; after 30 days the heater ships to World and Main freight prepaid. One amp figure covers 208-240V; on 208V the heater makes less heat, and Comfort Zone doesn't publish how much. |
| More | Model detailsOur full reviewView on Amazon → | Model detailsOur full reviewView on Amazon → |