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2. These Top-Rated Exhaust Fans Are Just What Your Musty ... - AOL

   www.aol.com/lifestyle/exhaust-fans-help-control...

   Say goodbye to steamy bathrooms, stuffy garages, or smoky kitchens with the best exhaust fans. Skip to main content. 24/7 Help. For premium support please call: 800-290-4726 more ways to ...

3. Centrifugal fan - Wikipedia

   en.wikipedia.org/wiki/Centrifugal_fan

   A centrifugal fan is a mechanical device for moving air or other gases in a direction at an angle to the incoming fluid. Centrifugal fans often contain a ducted housing to direct outgoing air in a specific direction or across a heat sink; such a fan is also called a blower, blower fan, or squirrel-cage fan (because it looks like a hamster wheel).

4. Fan (machine) - Wikipedia

   en.wikipedia.org/wiki/Fan_(machine)

   A cross-flow fan is a centrifugal fan in which the air flows straight through the fan instead of at a right angle. The rotor of a cross-flow fan is covered to create a pressure differential. A cross-flow fan has two walls outside the impeller and a thick vortex wall inside. The radial gap decreases in the direction of the impeller rotation.

5. Whole-house fan - Wikipedia

   en.wikipedia.org/wiki/Whole-house_fan

   Ducted: Remotely mounted away from the ceiling, typically hung from the rafters; can exhaust heat from multiple locations; operation is usually quiet compared to traditional whole-house fans. Window-mounted: Mounted in a window frame. Can also take cool air in from outside. Rooftop-mounted: Suitable for homes with no attic.

6. Ventilation (architecture) - Wikipedia

   en.wikipedia.org/wiki/Ventilation_(architecture)

   An axial belt-drive exhaust fan serving an underground car park. This exhaust fan's operation is interlocked with the concentration of contaminants emitted by internal combustion engines. Mechanical ventilation of buildings and structures can be achieved by the use of the following techniques: Whole-house ventilation; Mixing ventilation

7. Attic fan - Wikipedia

   en.wikipedia.org/wiki/Attic_fan

   An attic fan installed underneath a roof. 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, while sometimes a manual switch is used. An attic fan can be gable mounted or roof mounted. Additional ...