A rotating passive exhaust fan sits atop a California home's roof pictured against a blue sky with room for ad copy.

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Size: 5078px × 3373px
Photo credit: © DPD ImageStock / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: blue, cool, cooling, exhaust, heat, hot, passive, roof, shingles, sky., system, turbine, turn, turning, vent, ventilation, ventilator, whirlybird, wind, windy