Load & DesignQuestion 10 of 110
Which factor increases a building's cooling load the most on a hot afternoon?
a.Large west-facing glass with direct solar gain
b.North-facing insulated walls
c.A well-sealed attic hatch
d.Low-wattage LED lighting
Explanation
West-facing windows receive intense direct solar radiation in the afternoon, adding substantial sensible heat gain. This solar load is often a dominant component of the peak cooling load. Shading and low-SHGC glazing reduce this gain.
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