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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. Fan coil unit - Wikipedia

   en.wikipedia.org/wiki/Fan_coil_unit

   The thermostat controls the fan speed and/or the flow of water or refrigerant to the heat exchanger using a control valve. Due to their simplicity, flexibility, and easy maintenance, fan coil units can be more economical to install than ducted 100% fresh air systems (VAV) or central heating systems with air handling units or chilled beams .

4. Duracraft - Wikipedia

   en.wikipedia.org/wiki/Duracraft

   Duracraft was founded in the late 1980s by Tim Chen, Bernard Chiu and Ronald Izen in Southborough, Massachusetts.Duracraft manufactured home appliances such as fans, humidifiers, dehumidifiers and air conditioners in the United States, China, and South America.They were known for selling desk pedestal and window fans.

5. Thermostat - Wikipedia

   en.wikipedia.org/wiki/Thermostat

   A thermostat exerts control by switching heating or cooling devices on or off, or by regulating the flow of a heat transfer fluid as needed, to maintain the correct temperature. A thermostat can often be the main control unit for a heating or cooling system, in applications ranging from ambient air control to automotive coolant control.

6. Air conditioning - Wikipedia

   en.wikipedia.org/wiki/Air_conditioning

   The output of the infrared LED (like that of any infrared remote) is invisible to the human eye because its wavelength is beyond the range of visible light (940 nm). This system is commonly used on mini-split air conditioners because it is simple and portable. Some window and ducted central air conditioners uses it as well.

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   Discover the latest breaking news in the U.S. and around the world — politics, weather, entertainment, lifestyle, finance, sports and much more.