Finish TradesQuestion 416 of 700
Under the California Energy Code, a lower fenestration U-factor for windows indicates what about the window's performance?
a.Greater visible light transmittance
b.Higher air leakage
c.Better resistance to conductive heat transfer (less heat loss)
d.A larger glazing area
Explanation
U-factor measures the rate of conductive heat transfer, so a lower U-factor means the window loses less heat and performs better thermally. It is not a direct measure of visible light transmittance, air leakage, or glazing area, which are tracked by separate ratings such as VT and SHGC.
Law Reference: 2025 CA Energy Code Title 24 Part 6Practice all 700 questions free — no signup required.
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