Merv 13 Vs Hepa
Use this type of filter if you or someone in your home suffers from a chronic illness that weakens the immune system.
Merv 13 vs hepa. Filters with a merv rating of 13 to 17 are normally used in hospitals and nursing homes. Hepa is a type of pleated mechanical air filter. Merv rating chart standard 52 5 minimum efficiency reporting value dust spot efficiency arrestance typical controlled contaminant typical applications and limitations typical air filter cleaner type 20 n a n a 0 30 pm particle size cleanrooms 99 999 eff. Hepa stands for high efficiency particulate air filters and they are super efficient.
It is an acronym for high efficiency particulate air filter as officially defined by the u s. In fact hepa air filters are the only mechanical air filters that are tested and certified to meet a specific efficiency at a specific particle size. A filter with a merv rating of 13 to 16 is considered a high ranking merv filter and can remove up to 75 percent of all airborne particles 0 3 microns or greater from the air. Preceding unsigned comment added by 131 204 140 40 20 37 19 june 2009 utc.
A possible explaination is that the number is refering to the filter s merv rating. How air filters work. Merv ratings will range from 1 low efficiency. The rating scale range from 1 to 16 above 16 would be categorized as a true hepa filter.
These cheap filters ironically aren t tested either since they fall into the lowest category anyway. This type of air filter can theoretically remove at least 99 97 of dust pollen mold bacteria and any airborne particles with a size of 0 3 microns µm. A hepa boosts a merv 17 ranking. Hepa air filters are not merv rated as they exceed the ashrae test protocol 52 2 used in determining the merv ratings.
Acronym or minimum efficiency reporting value merv filters are rated based on how small airborne particles can be removed. The high end filters can filter particles as small as 0 3 microns with 75 percent efficiency. A low quality filter is rated between 1 4 merv and medium filter is rated between 5 12 merv range. The minimum efficiency reporting value or merv rating is a rating system used to compare filters made by various manufacturers.
Hepa or high efficiency particulate air filters are designed for applications where contaminants must be trapped on the first go round. Minimum filtration to 20 highest efficiency. All hepa air filters must meet a. They are ideal for removing bacteria from the air.
Aka a merv 12 merv 13 or merv 14 filter. On 10 20 pm particles 19 n a n a virus unattached radioactive materials 99 999. Compare a merv 17 to merv 19 hepa filter rating to the inexpensive fiberglass filters that are found in most average american homes. For most household uses the highest merv rating used will be merv 13 filters.
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