Filterbuy 20x21x1 Air Filter MERV 8 Dust Defense, Pleated HVAC AC Furnace Filter Replacement, 4-Pack
Filterbuy 20x21x1 Air Filter MERV 8 Dust Defense, Pleated HVAC AC Furnace Filter Replacement, 4-Pack
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Filterbuy 20x21x1 Air Filter MERV 8 Dust Defense, Pleated HVAC AC Furnace Filter Replacement, 4-Pack

Key item features

  • UNIVERSAL COMPATIBILITY: 20x21x1 replacement air filters for your furnace, air conditioner, or heat pump enhance HVAC system efficiency and support a healthy lifestyle (actual size: 19.50" x 20.50" x 0.75")
  • MERV 8 PERFORMANCE: Protect your home or business from pollen, lint, mold, and more with MERV 8 synthetic media (comparable with MPR 700 & FPR 5) that captures 90% of dust without restricting air flow
  • LONG-LASTING FILTRATION: Electrostatically charged media with 14 pleats per foot traps more microscopic particles and lasts 3x longer than fiberglass models (replace every 90 days for optimal performance)
  • SUPERIOR CONSTRUCTION: Easy installation beverage board frames with dual wire backing outperform flimsy cardboard designs by improving durability, preventing warping, and resisting extreme temperatures
  • MADE IN THE USA: Built with industrial-grade, recyclable materials and proudly manufactured 100% in the United States for dependable indoor air quality that is trusted by millions of homes
Current price is $49.96
Price when purchased online
  • Free shipping
  • Free 30-day returns
Subscribe, Your usuals, on your schedule, Save time and stay stocked!, $49.96
Your usuals, on your schedule
Save time and stay stocked!
One-time purchase $49.96

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Arrives by Wed, Jul 15
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Sold and shipped by FilterbuyPro Seller
4.587128252788104 stars out of 5, based on 4304 seller reviews(4.6)
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4.8 out of 5 stars
stars
72 ratings25 reviews
How item rating is calculated
  1. 5 stars88% (63)
  2. 4 stars8% (6)
  3. 3 stars1% (1)
  4. 2 stars1% (1)
  5. 1 star1% (1)
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Showing 1-3 of 25 reviews

Sep 4, 2025
Virginia
Sold and shipped byFilterbuy
5 out of 5 stars review

Verified Purchase

really good fit. a little expensive for a furnace filtet. Will buy again.

Helpful?46Q2FTXQYVZQ2008241477
Jan 30, 2021
Walmart customer
5 out of 5 stars review

I bought a house a

I bought a house a year ago with the 20-year-old furnace. The previous owners and the HVAC company were using 20/20x1. In the winter time I would collect a lot of dust and dust bunnies in the house. So I measured the opening and it measured 21x20x1. So I ordered a non-standard size from filter by and it has solved my problem No more heavy dust or dust bunnies.

Review from Filterbuy
Helpful?46Q2FTXQYVZQ2008241477
Nov 26, 2020
Theresa A.
5 out of 5 stars review

Couldn't ask for a better filter

Seems no matter where I shop I can never find 20x21 filters,,, until now. These filters from Filterbuy are the perfect size, they fit perfectly and using the Merv 8 quality filter cleans the air flowing through my furnace air-conditioning system without causing restriction on the blower. We have a contract with a local air-conditioning firm and they recommended using the Merv 8 filter for our unit, that in our area it was the ideal filter to buy.

Review from Filterbuy
Helpful?46Q2FTXQYVZQ2008241477