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DOE, TVA Partner in Energy Efficiency Project

Close up of the triple layer window spacer shows a dark grove in the middle which holds a polymer film stretched between the two outside sheets of glass forming two air pockets.

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DOE, TVA Partner in Energy Efficiency Project

This photo shows the design of all three houses in the study. All three houses have the same exterior design and floor plan.

03 / 03

DOE, TVA Partner in Energy Efficiency Project

The retrofit house has only one 3-ton heat pump located in the insulated and sealed attic compared to the builder house which has 2 heat pumps totaling 4.5 tons; one in the garage the other in the conventional vented attic with the insulation below the un