The Best Home Air Conditioning Filters


There are many aspects to consider in choosing an air filter for a central air conditioner. A common desire is to get the best performance from the filter at the best overall cost. The air-conditioning filter should maintain the efficiency of the air conditioner and maintain healthy air quality within the home or business.

Fiberlgass Filters

  • Using fiberglass filters in the central air conditioning system ensures greater ability to attract dust particles. Fiberglass filters contain a light adhesive to prevent dust from clogging ducts in the home and from collecting on the evaporator and condenser coils. Fiberglass filters are inexpensive, but you need to replace them at least once every 30 days. Many retail outlets and home improvement centers offer packs of three to five filters for under $5.

Pleated FIlters

  • Placing pleated filters in the central air conditioning system appeals to the cost-conscious. Replace pleated filters every 90 days. Although pleated filters can cost the consumer less money, the disadvantage of using pleated filters is that over time dust can accumulate on the filter, causing less efficiency and greater energy use when the central air or heat is active.


  • Filter the air conditioner with HEPA filters if you suffer from allergies such as pet dander, mold and pollen. HEPA filters are made from recycled paper providing for high performance in homes and businesses where people are sensitive to allergens floating in the air. HEPA filters contain smaller pleats than standard pleated filters to prevent dust and other allergens from accumulating on the filter. HEPA filters may be used for 30, 60, 90, or 120 days.


  • Consider financial and health costs when you decide which type of air conditioning filter is best for your home or business. Each type of filter has advantages and disadvantages. Filters need to be able to filter dust and allergens from the air and maintain the efficiency of the heating and air conditioning system while respecting the health needs of the people in the home or business.

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