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2. How Often You Should Change Your Air Filter—And What ... - AOL

   www.aol.com/often-change-air-filter-happens...

   How Often To Replace Air Filter. “How often you replace your air filter will depend on filter type, usage, and environmental factors," Goddard advises. "To be on the safe side, plan on changing ...

3. Air filter - Wikipedia

   en.wikipedia.org/wiki/Air_filter

   The cabin air filter, also known in the United Kingdom as a pollen filter, is typically a pleated-paper filter that is placed in the outside-air intake for the vehicle's passenger compartment. Some of these filters are rectangular and similar in shape to the engine air filter. Others are uniquely shaped to fit the available space of particular ...

4. You Aren't Changing Your Air Filter Enough - AOL

   www.aol.com/changing-hvac-filter-more-often...

   An HVAC expert weighs in on how often to change your air filter and explains how it can save you money. Learn how to do it yourself and when to call a pro.

5. Automotive air conditioning - Wikipedia

   en.wikipedia.org/wiki/Automotive_air_conditioning

   The air, often after being filtered by a cabin air filter, is blown by an adjustable speed electric powered centrifugal fan across the evaporator, causing the liquid part of the cold refrigerant mixture to evaporate as well, further lowering the temperature. The warm air is therefore cooled, and also deprived of any humidity (which condenses on ...

6. HEPA - Wikipedia

   en.wikipedia.org/wiki/HEPA

   HEPA filters are designed to arrest very fine particles effectively, but they do not filter out gasses and odor molecules. Circumstances requiring filtration of volatile organic compounds, chemical vapors, or cigarette, pet or flatulence odors call for the use of an activated carbon (charcoal) or other type of filter instead of or in addition to a HEPA filter. [20]

7. Air changes per hour - Wikipedia

   en.wikipedia.org/wiki/Air_changes_per_hour

   Air changes per hour, abbreviated ACPH or ACH, or air change rate is the number of times that the total air volume in a room or space is completely removed and replaced in an hour. If the air in the space is either uniform or perfectly mixed, air changes per hour is a measure of how many times the air within a defined space is replaced each ...