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2. Window fan - Wikipedia

   en.wikipedia.org/wiki/Window_fan

   A small twin window fan with thermostat A large single whole-house window fan with three-speed control and intake/exhaust switch The same fan, in operation. A window fan is a fan designed to be placed inside the frame of a window. Window fans have been used for many decades to maintain comfortable temperatures and ventilation within one's home ...

3. Feeling kind of hot? This lightweight reversible airflow ...

   www.aol.com/feeling-kind-hot-lightweight...

   TL;DR: As of July 25, you can get the Bionaire Thin Window Fan with Reversible Airflow for just $69.99 instead of $149.99 — that's a 53% discount.If you’ve spent the first half of summer ...

4. Heating, ventilation, and air conditioning - Wikipedia

   en.wikipedia.org/wiki/Heating,_ventilation,_and...

   Air-side economizers also use outside air to condition spaces, but do so using fans, ducts, dampers, and control systems to introduce and distribute cool outdoor air when appropriate. An important component of natural ventilation is air change rate or air changes per hour: the hourly rate of ventilation divided by the volume of the space. For ...

5. Ceiling fan - Wikipedia

   en.wikipedia.org/wiki/Ceiling_fan

   Air naturally stratifies, i.e. warmer air rises to the ceiling while cooler air sinks, meaning that colder air settles near the floor where people spend most of their time. A ceiling fan, with its direction of rotation set so that the warmer air on the ceiling is pushed down along the walls and into the room, heating the cooler air.

6. Fan (machine) - Wikipedia

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

   Special types of fans are used as low-pressure compressor stages in aircraft engines. Examples of axial fans are: Table fan: Basic elements of a typical table fan include the fan blade, base, armature, and lead wires, motor, blade guard, motor housing, oscillator gearbox, and oscillator shaft. The oscillator is a mechanism that motions the fan ...

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