Compared across 5 stores. Prices are checked against each store and labelled with when. Store links may earn us a commission. Price via Klarna.
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The Mr. Heater Forced Air Propane heater is a 400,000 BTU job-site and garage heater that runs on a standard propane tank and blows heated air with a fan. It is rated for spaces up to 4,000 sq ft and weighs 47 lb, so it is a portable unit rather than a fixed install. The best new price is $665.84 at The Home Depot as of November 7, 2026, with 5 stores listing it new. That price sits at the low end for a heater of this output class, though it is a big step up from smaller 60,000 to 150,000 BTU units.
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Lowest price we've seen: $665.84 on Nov 7 at The Home Depot. Tracked across 5 stores since Nov 7.
Owners of Mr. Heater forced-air propane units generally report strong heat output and quick warm-up in large garages and shops. Complaints center on fuel consumption, noise and the need for ventilation.
