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  • The Filtered Files
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Air

Indoor air quality (or IAQ for short) refers to the air quality within and around structures and buildings. IAQ is commonly affected by:

  • Mold, pet dander, viruses and dust mites
  • Cleaning and personal care products
  • Combustion products such as tobacco smoke, gas, fireplaces and more
  • Building materials such as carpet, cabinetry, insulation and more

    IMAGE CREDIT: Floridahealth.gov (we do not own the rights to this image)
    IMAGE CREDIT: Floridahealth.gov (we do not own the rights to this image)

Poor indoor air quality is commonly associated with symptoms such as:

  • Fatigue
  • Headaches
  • Irritation of the nose, eyes, lungs, and throat
  • Respiratory disease
  • Cancer

Exposure to some pollutants, such as carbon monoxide, can cause immediate death.

How to improve indoor air quality in 3 easy steps:

1.) Eliminate the individual sources of pollution and/or reduce their emissions. Certain sources, such as gas stoves, can be adjusted to decrease the number of emissions. Other sources (such as asbestos) can be enclosed or sealed.

2.) Inadequate ventilation is a common reason for low indoor air quality. Opening the doors and windows (when the weather permits) is a good way to increase ventilation in your home. For allergy sufferers, it is best to check the pollen level before doing so.

3.) Replace your furnace filters on a regular basis. A dirty air filter is non-effective at capturing the pollutants that may be present in your home and also decreases the efficiency of your HVAC unit. Therefore, it should be replaced every 3-4 months depending on air quality.

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When replacing your air filter, it is important to know which Minimum Efficiency Reporting Value (MERV) Rating you are getting. Here is a chart showing what each MERV Rating removes from your home or businesses air.

FiltersFast MERV ratings

Please note that for most homes, a MERV 11 is the recommended highest you would want to go. Some HVAC units cannot handle the higher MERV Ratings because of the restricted air flow.

For best practice, we recommend changing your air filters at least every 3 months. However, this number can vary depending on your indoor air quality. As a general rule, check your filter once a month and if it looks dirty, then change it. If not, you can leave it in and check back again the next month.

To determine what the common culprits are for the indoor air quality in your home, use the IAQ Test Kit. This will allow you to test for the most common contaminants such as pollen, dust mites, mold, fibers, and skin cell fragments.

By pinpointing what problem you are having, you will be able to find a solution that fits your needs without wasting money on products that may or may not solve the problem.

For more information or blogs related to indoor air quality, visit our blog.

 

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Reader Interactions

Comments

  1. Katie says

    August 31, 2020 at 2:11 pm

    James,

    Thank you for sharing this information. It is recommended that air filter be replaced at least every 3 months, but the frequency at which you replace your air filters is completely up to you.

    Thanks!

  2. Katie says

    August 31, 2020 at 2:09 pm

    Richard,

    Can you share what your question about cost is referring to?

  3. James Witt says

    August 28, 2020 at 6:12 pm

    Split-air system manufacturer recommends replacing home Air Return Filters every 4 weeks plus 2 days.
    Tampa/New Port Richey, Florida inspection services recommend M.E.R.V. 8, Air filters.
    Each unit to be inspected at least once each year, to keep manufacturer Ten-year warranty coverage.
    One use air filters, Dry filters, are recommended. * CAUTION * Wash-able filters can force tiny water-droplets into air ducts, increase mold and mildew in Florida’s high humidity climate, homes. This can require entire new R-8 Duct System, Labor, Florida Permit and Tax. Consider U.V. Light usage. Take care.
    Thank you for your information page.

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  • EPA Office of Indoor Air Quality
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  • National Air Filtration Association
  • National Ground Water Association (NGWA)

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