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At a house on a particular day the outside temperature differs from the inside temperature by 65 degrees fahrenheit. The house has a 39 inch by 7 foot front door.[ with storm door] What would be the heat loss through the front door of the house on this day in btu?

This cannot be answered without much more information. What is the heat insulation coefficent for the door is the main thing missing.

This cannot be answered without much more information. What is the heat insulation coefficent for the door is the main thing missing.

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    why did 10 years pass and no one was able to answer?!

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