Rated 20 times better on small particles than ordinary 1" filters in independent tests
Patented electrostatically-charged Filtrete fibers attract and hold particles like magnets
Retains more particles with pleated surface area
No monthly washing like less-effective 1" permanent filters
Use in furnace or A/C for full three months of air quality protection under normal conditions
3M reliability and proven performance in every air filter
MERV 11
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