A whole-house air purifier is a device that is installed in line with your residential HVAC system and will trap or destroy dust, pollen, and other harmful contaminants to clear the air and improve indoor air quality.
The EPA and Home Air Quality
According to the Environmental Protection Agency (EPA), the air indoors, where we spend as much as 90% of our time, can be 5X more polluted than outdoor air and more polluted than city smog and can contain an invisible mix of dust mites, pollen, dander, mold, micro-plastics, volatile organic components (VOC’s) and smoke that can annoy your lungs and be hazardous to your health.
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How Do House Air Filters Work?
Media Air Filter
Your first line of defense for clean air in your home is the air filter built into your air conditioning and heating system. The air inside your home circulates through your home’s return ducts (sometimes called cold air returns) into your heating and cooling system and then back into the rooms of your home. This air contains tiny particles such as pollen, pet dander, mold, tobacco smoke, exhaust, VOCs, viruses, and bacteria.
The largest particles appear as dust in your home, whereas the smaller particles become airborne and circulate throughout your home.
Air filters work by trapping particles from the air in your home onto the air filter installed in your air conditioning and heating system.
Media filters are the most common type of air filter and create a physical barrier inside your AC system that traps minute particles such as dust and dander in the air inside your home.
Electronic Air Cleaners (EAC), also called ionic and electrostatic air cleaners due to the electrical charge employed, also capture and filter contaminants such as dust and dander but, in addition, use an electronically charged filter to attract and trap smaller particles such as bacteria and mold.
Electronic filters work exceptionally well on smoke particles too small to be trapped in media filters. One independent test found that such filters worked about 30 times better than fiberglass filters. Unlike media filters, electronic filters never need replacing, but the aluminum collector plates must be cleaned in soapy water every few months.
How often do you need to change your home air filter? Click here for the answer.