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| Spec | Dr. Infrared Heater DR-975 7,500W Hardwired Garage Heater | Mr. Heater Big Buddy 18,000 BTU (MH18B, no fan) |
|---|---|---|
| Photo |  |  |
| Our score | SCORE6.6 / 10 | SCORE7.0 / 10 |
| Our take | The 7,500 W ceiling heater to buy for its 4,700 W low setting, which suits mild days better than the CZ230ER's 6,250 W low. It needs a licensed electrician, a 40 A circuit and 8 AWG copper, and its remote thermostat stops at 50°F. | 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 | 25,597 BTU/h | 18,000 BTU/h |
| Electric rating | 7,500 W | n/a |
| Fuel / power | 240V electric | Propane |
| Indoor use per manual | Not for residential or household use | Recreational enclosures + emergency, 1 lb only |
| Thermostat | Yes | No |
| Warranty | 1 yr | n/a |
| Watch out for | Not for areas where gasoline, paint or flammable vapors and liquids are used or stored. Not a residential or household heater, per its manual. HIGH/LOW can only be changed while the heater is heating. | 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. |
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