Finish TradesQuestion 261 of 700
Under the California Energy Code prescriptive requirements, residential windows must not exceed a maximum U-factor. A lower U-factor and a low SHGC together mean the window:
a.Lets in more unwanted summer heat
b.Loses heat faster in winter
c.Provides less insulation value
d.Insulates well and limits solar heat gain, improving energy performance
Explanation
A low U-factor means better resistance to heat flow (good insulation) and a low SHGC means less solar heat admitted, so together they cut both winter heat loss and summer heat gain. The other options describe the opposite of what low U-factor and low SHGC deliver.
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