MERV, Not Another Funny Texting Letters

MERV stands for Minimum Efficiency Reporting Value.  It is a scale to show the performance of an air filter.  The scale runs from 0 to 21.  Most ‘cheap’ filters you find in the grocery store are rated approximately 2-3.  ‘Good’ filters that are pleated are about a MERV 7-8.  Filtrete makes a great air quality filter that gets an 11-12 rating.  Any rating at 10 or above is considered a quality filter.  Lennox has a filter that is rated as ‘hospital quality’ with a rating of 16.  Clean Room technology like semiconductor manufacturing is a MERV 20-21.

MERV - Minimum Efficiency Rating Value



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