Aerostar 21 1/4x23 1/4x1 MERV 8 Pleated Air Filter, AC Furnace Air Filter, 6 Pack (Actual Size: 21 1/4" x 23 1/4" x 3/4")

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About This Nominal Size: 21 1/4x23 1/4x1; Actual Size: 21 1/4" x 23 1/4" x 3/4" Comparable to MPR 600 Clean Living and Honeywell Micro Defense Plus FPR 5 Designed to filter microsc opic particles such as lint, dust mites, spores, and pollen. Simple to install and a cost-effective step towards a healthier home environment. For best results, change your filters every 60 to 90 days but increase frequency to 30 days during peak summer and winter months 100% synthetic electrostatic media for high efficiency with low air flow resistance Overview Brand : Aerostar Material : Synthetic MERV Rating : 8.00 Compatible Devices : Furnace UPC : 192212067923 Number of Items : 6 Manufacturer : Filtration Group Product Grade : new Unit Count : 6 Count Show more