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  2. Fan coil unit - Wikipedia

    en.wikipedia.org/wiki/Fan_coil_unit

    These motors are sometimes called DC motors, sometimes EC motors and occasionally DC/EC motors. DC stands for direct current and EC stands for electronically commutated.. DC motors allow the speed of the fans within a fan coil unit to be controlled by means of a 0-10 Volt input control signal to the motor/s, the transformers and speed switches associated with AC fan coils are not required.

  3. 4 DIY Air Conditioners That Actually Work - AOL

    www.aol.com/4-diy-air-conditioners-actually...

    The most common DIY air conditioners are made out of coolers, with some type of fan to blow air in through a hole, and out through another. If you have most of the parts for this type, they’re ...

  4. Air conditioning - Wikipedia

    en.wikipedia.org/wiki/Air_conditioning

    Air conditioning, often abbreviated as A/C (US) or air con (UK), [1] is the process of removing heat from an enclosed space to achieve a more comfortable interior temperature and in some cases also controlling the humidity of internal air. Air conditioning can be achieved using a mechanical 'air conditioner' or by other methods, including ...

  5. Vitamin C does not prevent or treat the common cold, although it may have a protective effect during intense cold-weather exercise. If taken daily, it may slightly reduce the duration and severity of colds, but it has no effect if taken after the cold starts. [315] The bumps on a toad are not warts and cannot cause warts on humans.

  6. From blowing frozen bubbles to throwing boiling water: The ...

    www.aol.com/blowing-frozen-bubbles-throwing...

    In order to achieve this white cloud, the air must be cold, as well as dry with very low relative humidity, ideally below 25 percent. The experiment works best at temperatures below zero F.

  7. Central heating - Wikipedia

    en.wikipedia.org/wiki/Central_heating

    An air source heat pump can be used to air condition the building during hot weather, and to warm the building using heat extracted from outdoor air in cold weather. Air-source heat pumps are generally uneconomic for outdoor temperatures much below freezing. In colder climates, geothermal heat pumps can be used to extract heat from the ground ...

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