All 20 listings, cheapest per filter first
| Item | Size | Price | Per filter | |
|---|---|---|---|---|
| Amazon Basics MERV 5 AC Furnace Air Filter, 20x20x1 inches, 6-Pack (Actual size: 19.75" x 19.75" x 0 | 6 filter | $31.47 | $5.25 | Amazon → |
| Aerostar Air Filter 20x20x1 MERV 8 AC Filter, HVAC, Furnace Filter, 6 Pack | 6 filter | $32.45 | $5.41 | Amazon → |
| Aerostar Air Filter 20x20x1 MERV 8 AC Filter, HVAC, Furnace Filter, 4 Pack | 4 filter | $22.50 | $5.62 | Amazon → |
| Simply 20x20x1 Air Filter, Merv 8, MPR 600, 6 Pack, Furnace Air Filter for HVAC (Actual Size: 19.75" | 6 filter | $34.97 | $5.83 | Amazon → |
| Filter King 20x20x1 Air Filter MERV 8, AC Furnace Filters (12-Pack) | 12 filter | $69.96 | $5.83 | Amazon → |
| Amazon Basics 20x20x1 Air Filter 6-Pack, MERV 11 AC Furnace Filters, Dust, Pet, Allergen Control , E | 6 filter | $35.87 | $5.98 | Amazon → |
| Filterbuy 20x20x1 Air Filter MERV 8 Dust & Allergy Defense (6-Pack) | 6 filter | $36.96 | $6.16 | Amazon → |
| BNX TruFilter 20x20x1 Air Filter MERV 11 Allergy, Dust & Pet Defense 6-Pack | 6 filter | $39.98 | $6.66 | Amazon → |
| Filtrete 20x20x1 Air Filter, MERV 5, MPR 300, 6 HVAC Filters | 6 filter | $39.99 | $6.67 | Amazon → |
| Filterbuy 20x20x1 Air Filter MERV 8 Dust & Allergy Defense (4-Pack) | 4 filter | $26.96 | $6.74 | Amazon → |
| BNX TruFilter 20x20x1 Air Filter MERV 8 Dust, Pet & Allergy Defense 4-Pack | 4 filter | $27.50 | $6.88 | Amazon → |
| Filtrete 20x20x1 Air Filter, MERV 8, MPR 700, 6 HVAC Filters | 6 filter | $47.69 | $7.95 | Amazon → |
| BNX TruFilter 20x20x1 Air Filter MERV 13 Smoke, Allergy, Pet Defense 6-Pack | 6 filter | $47.97 | $8.00 | Amazon → |
| Filterbuy 20x20x1 Air Filter MERV 11 Pet & Allergy Defense (4-Pack) | 4 filter | $35.96 | $8.99 | Amazon → |
| Filterbuy 20x20x1 Air Filter MERV 13 Smoke & Allergy Defense (4-Pack) | 4 filter | $40.96 | $10.24 | Amazon → |
| Filtrete 20x20x1 Air Filter, MERV 11, MPR 1000, 4 HVAC Filters | 4 filter | $47.01 | $11.75 | Amazon → |
| TRIGHTFILTERS 20x20x1 Air Filter 2 Pack, MERV 8 Filter Replacement | 2 filter | $25.56 | $12.78 | Amazon → |
| Filtrete 20x20x1 Air Filter, MERV 13, MPR 1900, 2 HVAC Filters | 2 filter | $26.99 | $13.49 | Amazon → |
| Filtrete 20x20x1 Air Filter, MERV 11, MPR 1000, 2 HVAC Filters | 2 filter | $29.62 | $14.81 | Amazon → |
| Filtrete 20x20x1 Air Filter, MERV 12, MPR 1500, 2 HVAC Filters | 2 filter | $29.62 | $14.81 | Amazon → |
Prices as of 2026-10-24 19:54:23 UTC: Amazon item price (Amazon's own, else its lowest new offer) before shipping and tax, via Keepa. Size comes from Amazon's unit count or the listing title; check the listing before buying. Product prices and availability are accurate as of the date/time indicated and are subject to change. As an Amazon Associate, Sharpest earns from qualifying purchases.
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