17.5" x 21.5" x 1" MERV 13 Air Filters - $22.82/ea.
Aerostar 19 7/8 x 21 1/2 x 1 MERV 13 Furnace Air Filter, 6 Pack 192212039944 | eBay
13x21.5x1 Tier1 Air Filter Replacement MERV 13 - (6-Pack)
13x21.5x1 Odor Eliminator Air Filter - Only $15.67/ea.
Amazon.com: Pamlico Air 13 x 21-1/2 x 1 MERV 8 Pleated HVAC AC Furnace Air Filters. 6 Pack. (Exact Size: 13 x 21.5 x 0.75 Inches) : Tools & Home Improvement
Filter King Air Filters | 13x21x1 | 4-PACK | MERV 11 HVAC Pleated AC Furnace Filters | Actual Size 13 x 21 x .75" - Amazon.com
Filterbuy 13x21.5x1 Air Filter MERV 13, Pleated HVAC AC Furnace Filters Replacement | Wayfair
Merv 8 Pleated Air Filter - 13 3/8" x 21 1/2" x 1" – Any Kind Of Filter
19.5x21x1 - Air Filter for AC and Furnace | AirFilterExpress – Air Filter Express
Aerostar 13x21 1/2x1 MERV 8, Pleated Air Filter, 13 x 21 1/2 x 1, Box of 4, Made in The USA - Amazon.com
Filter King 13x21x1 Air Filter | 4-PACK | MERV 8 HVAC Pleated AC Furnace Filters | Actual Size 13 x 21 x .75" - Amazon.com
Aerostar 13x21x1 AC and Furnace Air Filter – Air Filters Delivered
HDX 13 in. x 21.5 in. x 1 in. Allergen Plus Pleated Air Filter FPR 7, MERV 11 HDX1P7-0014 - The Home Depot
13x21-1/2x1 Air Filter for Carrier/Bryant/Payne - Box of 4
HDX 21 in. x 21 in. x 1 in. Elite Allergen Pleated Air Filter FPR 12, MERV 13 61201.012121 - The Home Depot
Aerostar 13 x 21 1/2 x 1 MERV 8 Pleated Air Filter, AC Furnace Air Filter, 6 Pack - Walmart.com
13 X 21-1/2 X 1 Lifetime Air Filter - Electrostatic Washable Permanent A/C Furnace Air Filter. 65% More Efficiency - China Nylon Filter, Air Filter | Made-in-China.com
Merv 13 Pleated Air Filter - 21" x 21" x 1" – Any Kind Of Filter
13 x 21-1/2 x 1 Air Filter Glasfloss ZL Series MERV 11 - Box of 12
Filtrete 13.5-in W x 21.5-in L x 1-in MERV 5 Basic Pleated Air Filter in the Air Filters department at Lowes.com
HDX 21 in. x 21 in. x 1 in. Elite Allergen Pleated Air Filter FPR 12, MERV 13 61201.012121 - The Home Depot
Koch P8S1-130-214 - 13 x 21 1/2 x 1 MERV 8 Pleated Air Filter – 12-pac
21x21x1 Tier1 Air Filter Replacement MERV 13 - (6-Pack)
Aerostar 13 x 21 1/2 x 1 MERV 8 Pleated Air Filter, AC Furnace Air Filter, 6 Pack - Walmart.com
Dynamic C3P132112X 13 x 21 1/2 Air Filter
