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16x18x1 MERV 8 AC & Furnace Filters - Only $7.83/ea.
DuPont® 16" x 18" x 1" Plus 8000 MERV 10 Pleated Air Filter at Menards®
Pamlico Air 18x30x1 MERV 8 Pleated HVAC AC Furnace 1 Air Filters by Pamlico. Case of 12. Exact Size: 17-3/4 x 29-3/4 x 3/4 White 18 x 30 x 1 21208-011830 0 - Amazon.com
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16x18x1 AC and Furnace Air Filter by Aerostar - MERV 8, Box of 6 - Walmart.com
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HDX 18 in. x 30 in. x 1 in. Superior Pleated Air Filter FPR 9, MERV 12 HDX1P9-011830 - The Home Depot
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Filterbuy 16x20x1 Air Filter MERV 8 Dust Defense (4-Pack), Pleated HVAC AC Furnace Air Filters Replacement (Actual Size: 15.50 x 19.50 x 0.75 Inches): Replacement Furnace Filters: Amazon.com: Tools & Home Improvement
AAF/Flanders MERV 4 Disposable Air Filter 16 x 18 x 1 - 1001618 | Lowe's Pro Supply
Merv 8 Pleated Air Filter - 16" x 18" x 1" – Any Kind Of Filter
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HVAC Standard Pleated Air Filter MERV13 18" x 18" x 1" Qty 8
16x18x1 Tier1 Air Filter Replacement MERV 11 - (6-Pack)
A+2000 Washable Electrostatic Permanent Custom Air Filter - 16" x 18 1 – Any Kind Of Filter