2 Pack of 20x20x4 MERV 11 Pleated 4" Inch Air Filters by Glasfloss. Actual Size: 19-1/2 x 19-1/2 x 3-3/4 - Walmart.com
Purolator AC and Furnace Filter High Dust Holding Capacity
20x20x4 MERV 13 Premium Pleated AC Furnace Filters.
Nordic Pure 20x20x4 (19_1/2 x 19_1/2 x 3_5/8) Pleated MERV 7 Air Filters 2 Pack - Replacement Furnace Filters - Amazon.com
Honeywell 20x20x4 AC Furnace Air Filter Replacement - FC100A1011 HVAC Furnace Filters with Merv 11 Filter Media, AC Filter with Homequip Disposal Bag 1-Pack (Actual Size: 19.94 x 19.75 x 4.38 Inches) - Amazon.com
Honeywell 20x20x4 Air Filter Replacement - FC100A1011 HVAC Furnace Filters with Merv 11 Filter Media, AC Filter with Homequip Disposal Bag 2-Pack (Actual Size: 19.94 x 19.75 x 4.38 Inches) - Amazon.com
Filterbuy 20x20x4 Pleated Air Filters, Replacement for HVAC AC Furnace (MERV 11) | eBay
Filterbuy 20x20x4 Pleated Air Filters, Replacement for HVAC AC Furnace (MERV 13) | eBay
Nordic Pure 20x20x4 (19_1/2 x 19_1/2 x 3_5/8) Pleated MERV 12 Air Filters 2 Pack - Replacement Furnace Filters - Amazon.com
20x20x4 Tier1 Air Filter Replacement MERV 11 - (6-Pack)
20x20x4 Astro-Pleat MERV 13 Standard Pleated High Capacity AC / Furnace Filter | Air Filters, Inc.
20x20x4 MERV 11 Compatible Honeywell Return Grille Filter FC40R1003 Ai - Atomic Filters
Filterbuy 20x20x4 Air Filter MERV 13 Optimal Defense (6-Pack), Pleated HVAC AC Furnace Air Filters Replacement (Actual Size: 19.38 x 19.38 x 3.63 Inches) - Replacement Furnace Filters - Amazon.com
Amazon.com: Nordic Pure 20x20x4 (19_1/2 x 19_1/2 x 3_5/8) Pleated Air Filter MERV 12 Plus Carbon 2 Pack : Tools & Home Improvement
Filters Fast 20x20x4 Pleated Air Filter MERV 11, 4 inch AC Furnace Air Filters, Made in the USA, Actual Size 19.375x19.375x3.625, 3 Pack - Amazon.com
20x20x4 Air Filter MERV 10 Glasfloss Replacement for Honeywell - (2-Pack)
Filtrete 20x20x4 Air Filter, MPR 1550 MERV 12, Ultra Allergen Reduction, 1 Filter - Walmart.com
Nordic Pure 20x20x4 (19_1/2 x 19_1/2 x 3_5/8) Pleated MERV 14 Air Filters 2 Pack - Air Purifier Replacement Filters - Amazon.com
20x20x4 PREpleat MERV 13 Extended Surface 90013.042020 (6 Filters)
20x20x4 Astro-Sorb Activated Carbon AC / Furnace Filter | Air Filters, Inc.
Filterbuy 20x20x4 Air Filter MERV 11, Pleated HVAC AC Furnace Filters Replacement | Wayfair
20x20x4 Tier1 Air Filter Replacement MERV 11 - (6-Pack)
20x20x4 Air Filter MERV 11 Comparable to MPR 1000, MPR 1200 & FPR 7 Compatible with White Rodgers FR1600M-111 Premium USA Made 20x20x4 Furnace Filter 6 Pack MERV 11 by AIRX FILTERS WICKED CLEAN AIR. - Walmart.com
Furnace Filter 20X20X4 – Automated Filter Solutions
TopTech TechPure TT-FM-2020QB OEM 20x20x4 Replacement Furnace Filter - - Atomic Filters
