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The Aura Solar Attic Fan uses both solar and wind power for optimum ventilation performance both day and night. Other solar powered attic fans do not move air passively but the Aura Solar Fan does, just like a roof turbine ventilator (Whirly-Bird) but with no moving parts. Exhausting air passively (driven by wind) also removes hot air from the attic on summer evenings and cloudy days, thus lowering attic temperatures and reducing air conditioning loads.
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