Nine old, 12-ft^2 windows with a U-value of U = 1.2(Btu/h?ft^2??) were replaced with new windows having U = 0.3(Btu/h?ft^2??) . Calculate the energy savings on a day during a five-hour period when Tin = 68? and Toutside = 10?.

What will be an ideal response?


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