Filter Replacement is Key to High Air Quality

Our team keeps up with the latest research and this is a summary of what we believe are the most important things that homeowners should be aware of. We've also included links/citations to the medical journals that we sourced this information from, as well as additional readings. If you have any questions about indoor air quality, please contact us.


The three most important things to know about Indoor Air Quality (IAQ):
  • High indoor air quality in a home can substantially reduce the symptoms related to asthma, allergy and respiratory conditions.

  • Children are more susceptible to asthma, allergy and respiratory conditions. Reducing their exposure to airborne pathogens will reduce the chance that they develop these conditions throughout their lives

  • Home indoor air quality can be managed easily and inexpensively. Improving ventilation and filtration, and reducing contaminants have been shown to provide significant relief.

Air Filters and Indoor Air Quality
  • Using high-quality air filters is the single best way to improve air quality in your home.

    • The American Lung Association Health House recommends MERV 11 (our Best quality) filters or higher, and replacing filters at least every 3 months for normal residential use.

    • It is important to use the proper size filter that leaves as little room as possible for air to flow around the filter.Feel free to contact us if you have any questions about making sure you have the right size filter.

    • Filters should be replaced before they become significantly loaded (clogged). Expert recommendations range from monthly to every 3 months.This depends on usage and HVAC configuration. We recommend starting with every 3 months and increasing or decreasing frequency depending on how dirty the filters are at replacement.

    • If installing a new air handler or air conditioner, consider a system that accepts a 5 or 6-inch-thick filter media.



  • Poorly maintained HVAC systems (no filters, low quality filters or dirty filters) may actually increase symptoms related to asthma, allergies and other respiratory issues.

    • Filters with no MERV rating, or rated MERV 1 or 2 offer no protection against small particulate filtration. These filters may actually make air quality worse by capturing allergens and spreading them throughout your home and vent system.

    • Dirty filters themselves can become a source of contamination by fungal spores and allergens.  Contaminated filters than transmit the allergens through the vent system to the rest of your home.



  • When no filter is present, or filters are not replaced often, dust can collect in vents. This creates a breeding ground for mold and fungal bacteria.




Sources & Additional Readings
  • James L. Sublett, James Seltzer, Robert Burkhead, P. Brock Williams, H. James Wedner, Wanda Phipatanakul, American Academy of Allergy, Asthma & Immunology Indoor Allergen Committee, Air filters and air cleaners: Rostrum by the American Academy of Allergy, Asthma & Immunology Indoor Allergen Committee, Journal of Allergy and Clinical Immunology, Volume 125, Issue 1, January 2010, Pages 32-38, ISSN 0091-6749, 10.1016/j.jaci.2009.08.036.

  • Macintosh DL, Myatt TA, Ludwig JF, Baker BJ, Suh HH, Spengler JD. Whole house particle removal and clean air delivery rates for in-duct and portable ventilation systems. J Air Waste Manag Assoc 2008;58:1474–82. [PubMed: 19044163]

  • Sublett, JL, Effectiveness of Air Filters and Air Cleaners in Allergic Respiratory Diseases: A Review of the Recent Literature, Current Allergy and Asthma Reports, Volume 11, Number 5 (2011), 395-402, DOI: 10.1007/s11882-011-0208-5

  • United States Environmental Protection Agency, The Inside Story: A Guide to Indoor Air Quality,

  • United States Environmental Protection Agency, Residential Air Cleaners (Second Edition): A Summary of Available Information, August 2009,

  • American Lung Association Health House

The Filter Store Inc.

200 Leslie Drive, Unit 908

Hallandale Beach, FL, 33009

Office # 1-954-842-4350

Fax Number 954-458-0264


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