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You need to know the area of the room - "40 foot" is a distance. I'll assume you're saying this room is 40 x 40 feet.
1 foot = .3048 meters. So the room is 12.19 x 12.19 meters, or 149 cubic meters. Divide by 14, you get 10.6 x 1 kW, or 10.6kW.
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∙ 14y ago
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If you tell us the starting temperature and the finishing temperature and the specific heat of the material this 200 sq ft is made of then we'd have a chance of answering this one. But let's say that you're talking about a room (you didn't say you were but let's assume this), then a rule of thumb calculation, where the assumption is made that it takes 10 watts to heat a square foot of room, would show that you'd need 2,000 watts.
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If you tell us the starting temperature and the finishing temperature and the specific heat of the material this 200 sq ft is made of then we'd have a chance of answering this one. But let's say that you're talking about a room (you didn't say you were but let's assume this), then a rule of thumb calculation, where the assumption is made that it takes 10 watts to heat a square foot of room, would show that you'd need 2,000 watts.
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