19-1/2 x 21-1/2 x 1 Lifetime Air Filter - Electrostatic Washable Permanent A/C Furnace Air Filter Silver 94% arrestance by Kilowatts Energy Center at N Online Agency. MPN: 19121121VAFS-94%. Hurry! Limited time offer. Offer valid only while supplies last. Replaces 19-1/2 x 21-1/2 x 7/8 sized disposable filters. The actual size of this filter is 19-1/2 x 21-1/2 x 7/8. In the center, non-woven layer retains debris in a maze of fibers designed to maximize air flow even when soiled. Rated by independent testing laboratory at over 65% peak arrestance (particle filtering efficiency), this filter has 20 times the filtering capabilities of a disposable fiberglass filter.Highest filtering efficiency available for the majority of furnaces and air
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