20x20 filter

Filtrete 6pk 20''x20''x1'' MPR 1000 Merv 11 Allergen Defense Air Filter

Filtrete 6pk 20''x25''x1'' MPR 1000 Merv 11 Allergen Defense Air Filter

Filtrete 6pk 20''x30''x1'' MPR 1000 Merv 11 Allergen Defense Air Filter

Filtrete 6pk 20''x30''x1'' MPR 1500 Merv 12 Allergen Bacteria Virus Ultra Reduction Air Filter

Glasfloss 20x20x4 MERV 10 AC & Furnace Filters. 6 Pack. Actual Size: 19-1/2 x 19-1/2 x 3-3/4

Filtrete 20" x 25" x 4" Slim Fit Allergen Bacteria and Virus Deep Pleat Air Filter 1550 MPR: MERV 12, Electrostatic, Furnace Filter

Filtrete 14" x 20" MPR 700 Dust Pollen & Pet Dander Electrostatic Air Filter: MERV 8, Furnace & AC Compatible

Filtrete 20" x 25" x 4" Allergen Bacteria and Virus Air Filter 1550 MPR: MERV 12 Electrostatic for Home Furnaces

Filterbuy 17x20x4 Air Filter (5-Pack), Pleated MERV 8 Dust Defense Replacement HVAC AC Furnace Filters (Actual Size: 16.50 x 19.50 x 3.63)

Filterbuy 17x20x4 Air Filter (12-Pack), Pleated MERV 8 Dust Defense Replacement HVAC AC Furnace Filters (Actual Size: 16.50 x 19.50 x 3.63)

Filterbuy 13x20x2 Air Filter (5-Pack), Pleated MERV 8 Dust Defense Replacement HVAC AC Furnace Filters (Actual Size: 13.00 x 20.00 x 1.75)

Filterbuy 18x20x2 Air Filter (6-Pack), Pleated MERV 11 Allergen Defense Replacement HVAC AC Furnace Filters (Actual Size: 17.50 x 19.50 x 1.75)

Filterbuy 13x20x2 Air Filter (4-Pack), Pleated MERV 11 Allergen Defense Replacement HVAC AC Furnace Filters (Actual Size: 13.00 x 20.00 x 1.75)

Filterbuy 13x20x4 Air Filter (4-Pack), Pleated MERV 13 Health Defense Replacement HVAC AC Furnace Filters (Actual Size: 13.00 x 20.00 x 3.63)

Filterbuy 18x20x2 Air Filter (12-Pack), Pleated MERV 13 Health Defense Replacement HVAC AC Furnace Filters (Actual Size: 17.50 x 19.50 x 1.75)

Filterbuy 13x20x2 Air Filter (4-Pack), Pleated MERV 8 Dust Defense Replacement HVAC AC Furnace Filters (Actual Size: 13.00 x 20.00 x 1.75)

Filterbuy 10x20x4 Air Filter (3-Pack), Pleated MERV 8 Dust Defense Replacement HVAC AC Furnace Filters (Actual Size: 9.50 x 19.50 x 3.63)

Filterbuy 14x20x2 Air Filter (4-Pack), Pleated MERV 8 Dust Defense Replacement HVAC AC Furnace Filters (Actual Size: 13.50 x 19.50 x 1.75)

Filterbuy 15x20x4 Air Filter (2-Pack), Pleated MERV 8 Dust Defense Replacement HVAC AC Furnace Filters (Actual Size: 14.50 x 19.50 x 3.63)