Air Filters

Why Change Your Air Filter?

What’s the number one cause of HVAC system failure? A dirty air filter. Old, tired air filters allow allergens like dust, pollen, pet dander and mold to circulate through your home and lower the indoor air quality. For the highest air quality and energy efficiency, experts recommend changing out your air filter every 1-2 months.

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Air filters work 24/7 to keep your air clean and your HVAC running efficiently. As particles and allergens collect in the filter’s fine mesh, the harder it becomes for air to pass through. The HVAC system has to work harder to push air through a dirty filter, leading to higher energy bills and less efficient heating and cooling. Moisture can build on clogged air filters and grow mold. Because air doesn’t circulate as quickly with a dirty filter, dust can settle in ducts and on household surfaces. While duct cleanings are expensive, replacing your air filters is cheap, quick and simple. 
What are MERV ratings?

MERV stands for minimum efficiency reporting value and was developed by the American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE). MERV values range from 1 to 16, with higher ratings indicating that the filter is better at trapping particulate.

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Even though MERV ratings range from 1 to 16, experts recommend purchasing a MERV 6 or higher. The higher the rating, the more protected your home is from allergens and pollution. At the MERV 8 level, you're protected from basic particulate: mold spores, hair spray, fabric protector, cement dust. When you upgrade to MERV 11, you add protection from smoke, smog and virus. The best MERV-rated air filters will protect from all of the above and lead dust, oil and smoke and sneezes. The U.S. Department of Energy recommends MERV 13 or higher for the most energy efficient results.

Another consideration is air flow through your HVAC system. Leaving a dirty air filter in place or using a filter that is too restrictive may result in low air flow and possibly cause the system to malfunction.

MERV Ratings


Changing Your Air Filter is Simple

Typically, changing a filter is simple and doesn’t require a professional. Simply:

  • Determine what size filter you need
  • Select the appropriate MERV range for your filter
  • Slide your old filter out
  • Slide the new filter in
Changing air filter

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