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Savannah, GA & Hilton Head, SC

912-384-2247

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Savannah, GA & Hilton Head, SC

833-224-2247

Douglas, GA

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AAction Air Conditioning & Heating Co. Blog

How Is the Efficiency of Air Filters Measured?

Your forced-air air conditioning and heating system contains a filter which keeps you from breathing in harmful particles that may otherwise move through your ducts, including dust, pollen, animal dander, and some molds. You should replace the filter every month or so, or clean out washable filters just as often for maximum efficiency and performance. However, if you continue to replace your filter with the same type of standard filter that came included with your HVAC system, you may not be getting the quality you need. AAction Air has created this guide to help you choose the most effective mechanical filter for your AC.

MERV

The minimum efficiency reporting value, or MERV rating, is a measurement scale created to rank the effectiveness of mechanical filters. The scale goes from 1 to 16, and the numbers correspond to the percentage of particles that particular filter is able to trap. At the highest end of the scale are filters that can remove up to 95% of all particles that pass, including bacteria and smoke. If you currently use a filter with a MERV of 1-4, you may consider upgrading, as you may be missing out on a filter that also targets allergens like mold spores and animal dander.

HEPA filters

A HEPA or high efficiency particle air filter is certified by the U.S. government to remove over 99% of particles that pass through, as small as 0.3 micrometers in size. HEPA filters are actually not often used in residential application because they can hinder the efficiency of your HVAC system. If your HVAC system cannot suck in enough air through the filter, the evaporator coil may freeze or the blower motor may work too hard, eventually breaking down.

Other Considerations

You should take into account that a mechanical filter cannot remove all types of contaminants, especially since most particles in your home will settle before they make it to the vents. You may choose an electronic air cleaner to help keep even more particles out of the air.

Learn more about air filtration in Savannah by calling the experts at AAction Air, and ask to hear about all of the air purification systems that may be available to you.

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