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4QualityAir.com - 13x21.5x1 (Actual Size) DuPont High Allergen Care Electrostatic Air Filter
Filterbuy 13x21.5x1 MERV 8 Pleated HVAC AC Furnace Air Filters (2-Pack) - Walmart.com
Filterbuy 13 x 21.5 x 1 Air Filter MERV 13, Pleated HVAC AC Furnace Filters Replacement | Wayfair
13"x 21 1/2"x 1" AC Furnace Air Filter Rigid Washable Cut to Fit 13" x 21.5" x 1 | eBay
Accumulair Pleated Air Filter, 13" x 21.5" x 1", 4 Pack FD13X21.5A_4 | Zoro
Filterbuy 13x21.5x1 MERV 8 Pleated HVAC AC Furnace Air Filters (2-Pack) - Walmart.com
Filterbuy 13 x 21.5 x 1 Air Filter MERV 13, Pleated HVAC AC Furnace Filters Replacement | Wayfair
Accumulair Pleated Air Filter, 13" x 21.5" x 1", 4 Pack FA13X21.5A_4 | Zoro
Amazon.com: Filterbuy 13x21.5x1 Air Filter MERV 8 Dust Defense (2-Pack), Pleated HVAC AC Furnace Air Filters Replacement (Actual Size: 12.88 x 21.50 x 0.75 Inches) : Tools & Home Improvement
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Filtrete 13.5-in W x 21.5-in L x 1-in MERV 5 Basic Pleated Air Filter in the Air Filters department at Lowes.com
