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How Much Heat Does Your House Lose?

When a contractor calculates the heat loss of a home, he looks at many things. He needs to know the amount of insulation in the walls and ceilings, the number of windows and doors and how big they are, the type of construction of the house, the number of occupants, how many lights are in the home, and many other factors that affect the production and storage of heat. It's not as easy as it seems.
 
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