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NOT A GOOD QUESTION WITHOUT QUALIFICATION OF PARAMETERS. HEAT LOAD? A 10' X 10' BOX WITHOUT WINDOWS?= MIGHT BE ENOUGH HEAT AT -5. A 30' X 40' HOME WITH R-19 WALLS AND THERMOPANE WINDOWS= PROBABLY ENOUGH. lc

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15y ago
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15y ago

470 - 706 ft2 depending on heat loss and many other variables

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11y ago

600sqft

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Q: How many sq ft will a 28000 Btu heater heat?
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