Energy · IECC 2021 §C402.4.2
Skylight Minimum Area in Large Enclosed Spaces
Spaces over 2,500 sq ft with 75 percent or more of the ceiling above 15 ft need a toplit daylight zone of at least half the floor area, met by 3 percent skylight area or 1 percent effective aperture, with six exceptions.. Referenced to IECC 2021 §C402.4.2.
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