Skip navigation

833-224-2247

Savannah, GA & Hilton Head, SC

912-384-2247

Douglas, GA

Savannah, GA & Hilton Head, SC

833-224-2247

Douglas, GA

912-384-2247

Menu

AAction Air Conditioning & Heating Co. Blog

What Do HEPA and MERV Stand For, and What Do They Mean?

Indoor air quality is an important part of your overall comfort, and when looking for ways to improve it, there are two acronyms of which to be aware: HEPA and MERV. Each of these terms helps define what a specific air filtration system in Savannah can do for you and your home, so AAction Air has put together a little “cheat sheet” to help you.

What Is HEPA?

HEPA stands for High Efficiency Particulate Air and it is an air filter that traps particles as small as 0.3 microns (the average human hair is 100 microns) and has an efficiency rating of 99.97%. In other words, for every 10,000 particles that pass through a HEPA filter, only 3 will escape.

HEPA filters capture allergens, including pollen and pet dander, some mold and mildew spores, some bacteria and virus microbes (usually not many, though, as those particles tend to be smaller than 0.3 microns), dust, dirt and dust mites. HEPA filters can help remove smoke, but they don’t help with odors or the elimination of gases such as carbon dioxide. HEPA filters do not destroy particles but rather capture them, so to truly eradicate biological pollutants, it’s a good idea to pair a HEPA filter with a UV germicidal light. HEPA filters need to be changed approximately every 3 months and they are not washable.

What Is MERV?

MERV stands for Minimum Efficiency Reporting Value and is the industry standard for measuring the effectiveness of filters. The scale for MERV ranges from 1 to 20; the higher the MERV rating, the more particles the filter removes. Effective home filters have MERV ratings in the range of 5-12; filters with MERV ratings of 13+ are made for properties like hospitals and can seriously constrict the flow of air in your air conditioning system. There are 3 basic quality levels when using MERV:

  • 1-4 MERV – good for blocking dirt and debris for your air conditioning system, but not really for improved air quality
  • 5-8 MERV – better for air quality, and can help with dust, debris, mold spores and pet dander
  • 9-12 MERV – superior performance for air quality; recommended for homes with allergy and asthma sufferers

The most recommended MERV rating for indoor air quality is 8 and up.

Wondering What an Air Filtration System Can Do For You? Call Us

If you or your family members have been feeling the effects of poor indoor air quality, adding an air filtration system to your Savannah home may be just the solution you’ve needed.

Call AAction Air today and schedule an appointment with one of our air filtration specialists to learn about how you can improve the quality of air in your home.

Comments are closed.