- $49.9820 x 25 x 4 Pleated Furnace Air Filter FPR 8, MERV 8 (2-Pack)The Home Depot
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- $17.99Filters Fast 611D R Compatible Replacement for Bionaire Air Purifier 611D Air Cleaner Filter Furnace Filters Actual Size: 3 1/2" x 9 7/8" x 2"Amazon
- $44.96Filter King Universal Air Filter for FurnaceWayfair
- $48.99Filter King 5x18x1a A/C Furnace Filter 4-PACK MERV 8 Actual Size: 5 x 18 x .75"Wayfair
- SALEUBeesize 14x25x1 Reusable Electrostatic Air Filter HVAC AC Furnace Filter,MERV 8, Washable, Lasts a Lifetime,Permanent Air Filter,Breathe Fresher,Home And Office(Actual Size:13.5x24.5x0.86 Inch)Amazon・Sale
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- SALEDemiwise 20x20x1 Electrostatic Air Filter, 8 Stage Washable Aluminum AC/HVAC Furnace Filter, Reusable Permanent Air Filter, Lasts a Lifetime, Easy to Install, Healthier Home/Office EnvironmentAmazon・Sale
- SALEDemiwise 16x20x1 Electrostatic Air Filter, MERV 8 Washable Aluminum AC/HVAC Furnace Filter, Reusable Permanent Air Filter, Lasts a Lifetime, Easy to Install, Healthier Home/Office EnvironmentAmazon・Sale
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- SALEUBeesize 20x20x1 Reusable Air Filter - Washable, MERV 8,Permanent, Electrostatic - Lasts a Lifetime - Enjoy Fresher Air in Home and Office HVAC AC Furnace Systems (Actual Size: 19.75x19.75x0.86 Inch)Amazon・Sale