Filtrete 16-in W x 20-in L x 4-in MERV 12 1550 MPR Allergen, Bacteria and Virus Electrostatic Pleated Air Filter in the Air Filters department at Lowes.com
Glasfloss 16 x 20 x 4 MERV 10 Furnace Filter (6 Pack) - Replacement Furnace Filters - Amazon.com
Buy 16 x 20 x 4" Air Filter | AirFilters.com
FC100A1003 - Honeywell Home FC100A1003 - 16" X 20" Media Air Filter
Honeywell Home 16 x 20 x 4 Pleated Furnace Air Filter FPR 10, MERV 12 CF200D1620 - The Home Depot
Elite Allergen High Performance 2200 MPR Air Filter 16" x 20" x 1" - 4 Pack
Aerostar 16x20x4 (Two Pack) MERV 11, Pleated Air Filter, 16 x 20 x 4, Box of 2, Made in the USA - Walmart.com
HDX 16 in. x 20 in. x 4 in. Honeywell Replacement Pleated Air Filter FPR 9, MERV 13 HDX-HW1620-13-3 - The Home Depot
Filtrete 16-in W x 20-in L x 4-in MERV 12 1550 MPR Allergen, Bacteria and Virus Electrostatic Pleated Air Filter in the Air Filters department at Lowes.com
Honeywell 16 x 20 x 4 Media Air Filter (MERV 11) - HVAC Surplus
16x20x4 Tier1 Air Filter Replacement MERV 8 - (6-Pack)
Aerostar 16x20x4 (Two Pack) MERV 11, Pleated Air Filter, 16 x 20 x 4, Box of 2, Made in the USA - Walmart.com
HDX 16 in. x 20 in. x 4 in. Honeywell Replacement Pleated Air Filter FPR 7, MERV 11 HDX-HW1620-11-3 - The Home Depot
HDX 16 in. x 20 in. x 4 in. Honeywell Replacement Pleated Air Filter FPR 9, MERV 13 HDX-HW1620-13-3 - The Home Depot
Bestair 16 in. W X 20 in. H X 4 in. D 8 MERV Pleated Air Filter BA4-1620-8 | Zoro
TopTech TT-FM-1620 Ready to Use TechPure TTFM1620 Air Filter 16x20x4 Top Tech OEM Cartridge 16 by 20 by 4 in Furnace MERV 11 for Carrier TT-MAC-1722 - Amazon.com
PRO-SOURCE - Pleated Air Filter: 16 x 20 x 4″, MERV 10, 55% Efficiency, Wire-Backed Pleated - 00626465 - MSC Industrial Supply
Filtrete™ High Performance Air Filter 2200 MPR EA00-4, 16 in x 20 in x 1 in - The Binding Source