Which Filter is Better for My Air Conditioning Unit in Scottsdale?

A homeowner’s indoor air quality relies heavily on the air filtering system that they utilize with their heating and air conditioning system in Scottsdale.  If homeowners filter their indoor air with high quality HEPA filters, and perhaps a germicidal UV light they will undoubtedly decrease the dust, pet dander, and bacteria that are present throughout many homes.

If you are shopping for a new air filter you should know the difference between HEPA and MERV filters.  MERV stands for Minimum Efficiency Reporting Value.  HEPA stands for High Efficiency Particulate Air (filter).  Each of these filters receives a ranking based on how small of a particle they filter, and to what efficiency they do it.  A low ranking MERV filter has a ranking of 1 to 4, a medium MERV filter receives a ranking of 5-13, and high efficiency MERV filter will be ranked from 13-16.  High efficiency filters filter out particles as small as 0.3 microns, and with at least 75% efficiency.

HEPA filters are very efficient, they are graded with the same ranking system as the MERV filters, but they receive rankings as high as 17-20.   In order to be called HEPA filters they have to meet standards set by the DOE, which say they have to remove at least 99.97% of airborne particles down to the size of 0.3 microns.  These type of filters are used in air planes and hospitals to reduce the transfer of bacteria and viruses.

While the obvious choice here might be to go with the HEPA filter because they are higher quality they do have a few drawbacks for smaller residence.  Because HEPA filters are so dense with fiberglass to catch the tiny particles it takes a lot of air pressure or energy to push air through the filter.  Unless your air conditioning installation is for a large residence, or building a HEPA filter might not be the best choice.  Also realize that the high quality MERV filters remove 75% of all 0.03 sized microns each time they pass through the filter, so in a home where air is recycled, so once the air recycles a few times most of the dust particles, pet dander and bacteria will be caught in your air conditioning system.

If you have any questions about how air conditioning maintenance and indoor air quality effect the overall well being of your family please call Norris Air.

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