Aerostar 18x20x1 MERV 13 Pleated Air Filter, AC Furnace Air Filter, 6-Pack

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Includes 6 filters.
Nominal size: 18x20x1; Actual size 17 3/4"x 19 3/4" x 3/4".
This MERV 13 filter is comparable with MPR 1500-1900 & FPR 10.
Designed to filter microscopic particles such as lint, dust mites, spores, pollen, pet dander, fine dust, smoke, viruses, and bacteria.
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
Manufactured by Filtration Group, a world-leading manufacturer and supplier of filtration solutions making the world safer, healthier & more productive.