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2. Should You Cover Your AC Unit In The Winter? Experts Explain

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   Once the colder months start to make an appearance, so does your home's heating system. The AC unit temporarily becomes thing of the past but that doesn't mean it's long forgotten. Within a few ...

3. 9 Outdoor Items You Should Never Leave Outside During Winter

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   Outdoor speakers are not waterproof, and when left outside in the winter for too long, can damage the sound system. Related: Should You Cover Your AC Unit In The Winter? Experts Explain

4. What Temperature Should You Set Your Thermostat To In The ...

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   What thermostat setting is too cold for below-freezing temperatures outside? Although water freezes at 32 degrees Fahrenheit, it's a good idea to keep your thermostat at 50 degrees or higher.

5. 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.

6. Air handler - Wikipedia

   en.wikipedia.org/wiki/Air_handler

   A larger air handler that conditions 100% outside air, and no recirculated air, is known as a makeup air unit (MAU) or fresh air handling unit (FAHU). An air handler designed for outdoor use, typically on roofs, is known as a packaged unit ( PU ), heating and air conditioning unit ( HCU ), or rooftop unit ( RTU ).

7. Air door - Wikipedia

   en.wikipedia.org/wiki/Air_door

   A typical commercial air curtain enclosure. In North America, the more commonly-used term for an air door is "air curtain". The American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE) defines an air door as follows: "In its simplest application, an air curtain is a continuous broad stream of air circulated across a doorway of a conditioned space.