Query: 18x20x1 air filter
Crisp Filters, 18x20x1 Air Filter, MERV 8, MPR 600, AC Furnace Air Filter, 4-Pack
Aerostar 18x20x1 MERV 8 Pleated Air Filter, AC Furnace Air Filter, 6 Pack (Actual Size: 17 3/4"x 19 3/4" x 3/4")
Precisionaire Furnace Air Filter 18 " X 20 " X 1 " Fiberglass
Aerostar 18x20x1 MERV 11 Pleated Air Filter, AC Furnace Air Filter, 6 Pack (Actual Size: 17 3/4"x 19 3/4" x 3/4")
AIRx HEALTH 18x20x1 MERV 13 Pleated Air Filter - Made in the USA - Box of 6
Aerostar 18x20x1 MERV 13 Pleated Air Filter, AC Furnace Air Filter, 6-Pack (Actual Size: 17 3/4" x 19 3/4" x 3/4")
AIRx DUST 18x20x1 MERV 8 Pleated Air Filter - Made in the USA - Box of 6
Filterbuy 18x20x1 Air Filter MERV 8 (Allergen Odor Eliminator), Pleated HVAC AC Furnace Filters with Activated Carbon (2-Pack, Black)
Filtrete 20x25x1, AC Furnace Air Filter, MPR 2200, Healthy Living Elite Allergen, 6-Pack (exact dimensions 19.69 x 24.69 x 0.78)
Aerostar 18x20x1 MERV 11 Pleated Air Filter, AC Furnace Air Filter, 4 Pack (Actual Size: 17 3/4"x19 3/4"x3/4")
Crisp Filters, 18x20x1 Air Filter, MERV 8, MPR 600, AC Furnace Air Filter, 6-Pack
Crisp Filters, 18x20x1 Air Filter, MERV 8, MPR 600, AC Furnace Air Filter, 2-Pack
AIRx Filters Allergy 18x20x1 Air Filter MERV 11 AC Furnace Pleated Air Filter Replacement Box of 6, Made in the USA
Nordic Pure 18x20x1 MERV 8 Pleated AC Furnace Air Filters 6 Pack
Filtrete 18x20x1, AC Furnace Air Filter, MPR 1000, Micro Allergen Defense, 4-Pack (exact dimensions 17.81 x 19.81 x 0.81)
E-Z Flow Heavy Duty Air Filter, MERV 4, 18 x 20 x 1-Inch, 12-Pack
Flanders PrecisionAire 84858.011820 18 by 20 by 1 NaturalAire Standard Pleat Air Filter, 12-Pack
Filterbuy 18x20x1 Air Filter MERV 13, Pleated HVAC AC Furnace Filters (4-Pack, Platinum)
Filterbuy 18x20x1 Air Filter MERV 8, Pleated HVAC AC Furnace Filters (4-Pack, Silver)
Filterbuy 18x20x1 Air Filter MERV 8, Pleated HVAC AC Furnace Filters (6-Pack, Silver)
Filterbuy 18x20x1 Air Filter MERV 13, Pleated HVAC AC Furnace Filters (2-Pack, Platinum)
FilterBuy 18x20x1 Air Filter MERV 8, Pleated HVAC AC Furnace Filters (2-Pack, Silver)