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- $44.96Filter King Universal Air Filter for FurnaceWayfair
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- $53.972-Pack Air Filter Factory Replacement For Aprilaire Space-Guard 201, 2200, 2250 Accordion Style Furnace Air FiltersAmazon
- SAVE $12.50$104.79$117.29Air King 9723 20-Inch 3-Speed Box Fan, White & Aerostar 20x20x1 MERV 13 Pleated Air Filter, AC Furnace Air Filter, 6 Pack (Actual Size: 19 3/4" x 19 3/4" x 3/4")Amazon
- $18.9716 in. x 20 in. x 1 in. Superior Pleated Furnace Air Filter FPR 9, MERV 12The Home Depot
- $39.96Filter King 6x14x1 Air Filter | 4-PACK | MERV 8 HVAC Pleated A/C Furnace Filters | MADE IN USA | Actual Size: 6 x 14 x .75"…Amazon