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.
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