Merv Air Filter

Hepa is a type of pleated mechanical air filter.

Merv air filter.

Higher value merv rating equates to finer filtration meaning fewer dust particles and other airborne contaminants can pass through the filter. Minimum efficiency reporting value merv is a standard that rates the overall effectiveness of air filters. Merv 8 filters remove basically the same particulates as a merv 6 but they are more efficient. An air filter s merv rating is a scale from 1 16 that describes the minimum efficiency of the air filter.

It is an acronym for high efficiency particulate air filter as officially defined by the u s. With a dust spot efficiency of 30 35 they are 20 times more efficient than regular fiberglass filters. Filters with a merv 11 rating have a dust spot efficiency of 60 65 and are 30 times more. Merv stands for minimum efficiency reporting value.

Some of the common particles that filters are tested for include pollen dust mites textile. Merv otherwise known as minimum efficiency reporting value is a measurement scale that rates the effectiveness of filters at trapping airborne particles. The scale ranges from 1 16 with 16 being the most effective. Here s an in depth description of the process used to determine merv from the national air filtration association.

Minimum efficiency reporting value commonly known as merv is a measurement scale designed in 1987 by the american society of heating refrigerating and air conditioning engineers ashrae to report the effectiveness of air filters. Filters with higher merv ratings trap small particles more effectively than filters with lower merv ratings. The merv rating system is intended to be used to determine the filter s ability to remove particulates from the air. Merv 8 rated filters are high quality filters.

An air filter s minimum efficiency reporting value merv rating measures how effectively the filter stops dust and other contaminants from passing through the filter and into the air stream.