Air Filter Merv Rating Explained
Merv, mpr and fpr rating systems explained.
Air filter merv rating explained. The higher the merv rating the better the filter is at trapping specific types of particles. Have you wondered why there are 3 different rating systems? Merv filter ratings and efficiency.
Merv is the worldwide standard rating system for air filter quality. Ashrae developed the merv air filter efficiency rating system. The merv rating helps you determine which air filter you should use for your home air filter.
The test is based on particle size. Here’s a simple chart we put together to explain each of the different air filter ratings and what the differences are: The rating is derived from a test method developed by the american society of heating, refrigerating, and air conditioning engineers (ashrae) [see www.ashrae.org].
Certain brands have created their own rating system but, at the end of the day, they are rating the same filter! Ac filter merv ratings start at 1 and go up. This numbering system makes it easier to evaluate and compare mechanical air filters and will hopefully eliminate some of the confusion regarding.
When selecting the right filter for your application, higher is not always better. In general, air filters with higher merv ratings remove a higher percentage of airborne contaminants, therefore improving your home’s indoor air quality. For a merv filter to get close to the efficiency of a hepa filter, it.
Typically found in hospital inpatient care facilities and capable of capturing all bacteria. A low merv rating means that the filter does not remove as many particulates from the air. A filter with a merv 8 rating, for instance, is a good everyday filter, and will remove large particulates from the air and protect your hvac unit from the damage that unfiltered air can cause.
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