Merv Air Filter Meaning

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Merv air filter meaning.

According to the american society of heating refrigerating and air conditioning engineers ashrae this filtration helps provide healthier indoor air quality a filter s merv number indicates how it s rated to remove these particles. When i say it s the standard rating system i mean it. Your filters merv rating is a good way to help judge the effectiveness of the filter. Merv means m inimum e fficiency r eporting v alue which was developed by the american society of heating refrigeration and air conditioner engineers.

This can create more resistance in airflow than a system is designed to manage thus making it. Many new jersey homeowners ask us about merv ratings especially when it comes to choosing between merv 8 and merv 11 air filters. So the higher the merv rating the more efficient it is. Minimum efficiency reporting value merv is a standard that rates the overall effectiveness of air filters.

Think of merv 8 filters as a good option and merv 11 filters as the better option for normal residential use. The minimum efficiency reporting value or merv rating determines the efficiency of an air filter. This rating system is defined in an ashrae standard 52 2 which specifies the conditions under which the testing must be done and the performance required to meet each merv level. In this article we ll go into more detail about merv filters and how to choose the right one for your new.

The higher the merv rating the smaller the pores are for air to flow through an hvac filter. The merv rating system is intended to be used to determine the filter s ability to remove particulates from the air. Higher value merv rating equates to finer filtration meaning fewer dust particles and other airborne contaminants can pass through the filter. The standard rating system for filters is called minimum efficiency reporting value or merv.

An air filter s merv rating is a scale from 1 16 that describes the minimum efficiency of the air filter. 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. As air moves through a building s hvac system air filters trap and collect large and small particles such as dust allergens and microorganisms. Hepa is a type of pleated mechanical air filter.

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. It is an acronym for high efficiency particulate air filter as officially defined by the u s. But a higher merv does not mean it s better for your air conditioning system.