Attic fan
fan used to keep an attic ventilated
A powered attic ventilator, or attic fan, is a ventilation fan that regulates the heat level of a building's attic by exhausting hot air. A thermostat is used to automatically turn the fan off and on, although it is sometimes operated by a manual switch. An attic fan can be gable-mounted or roof-mounted. Additional vents are required to allow fresh air to be drawn in as the hot air is exhausted. Attic fans are typically used in warmer months, when temperatures in an attic can exceed 120 °F (49 °C). A fan may be installed in an attic for the purpose of cooling a whole house by venting hot air out via the attic. Such fans are often called whole-house fans.
Mechanical attic ventilation fans may be powered in a variety of different ways. Most attic ventilators fitted to homes are powered by mains electricity. There has been a trend towards solar-powered attic ventilators in the interest of conserving electricity and lowering monthly utility bills.
“Attic fan” enters the record as fan used to keep an attic ventilated. Crown Archives preserves that source wording while asking what Attic, used and keep can confirm, complicate or overturn.
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This entry incorporates text from “Attic fan” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.