Filterbuy 20x20x1 Air Filter MERV 11 Allergy Defense, Pleated HVAC AC Furnace Filter Replacement, 5-Pack
Filterbuy 20x20x1 Air Filter MERV 11 Allergy Defense, Pleated HVAC AC Furnace Filter Replacement, 5-Pack
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Filterbuy 20x20x1 Air Filter MERV 11 Allergy Defense, Pleated HVAC AC Furnace Filter Replacement, 5-Pack

|21K ratings

Key item features

  • UNIVERSAL COMPATIBILITY: 20x20x1 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 19.50" x 0.75")
  • MERV 11 PERFORMANCE: Protect your home or business from allergens, pets, and more with MERV 11 synthetic media (comparable with MPR 1200 & FPR 7) that captures 95% 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

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Customer ratings & reviews

4.6 out of 5 stars
stars
21K ratings7,125 reviews
How item rating is calculated
  1. 5 stars82% (17.2K)
  2. 4 stars8% (1,776)
  3. 3 stars3% (689)
  4. 2 stars2% (382)
  5. 1 star4% (902)
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Showing 1-3 of 7,125 reviews

Aug 20, 2026
Reviewer name: Customer
Sold byFilterbuy
5 out of 5 stars
5 out of 5 stars review

Affordable and effective

I love these filters. Affordable and effective. It's amazing to see how much they have collected when it's time to change them. The subscription service is great. A little extra savings and a subtle reminder that you forgot to change them. LOL. But I usually notice when it's time if I forget, I find myself sneezing and having itchy eyes in the house. Which always improves once I change them Highly recommend these and Filterbuy

Review from Filterbuy
Helpful?5Q874HJWURT2902092881
Aug 15, 2026
Reviewer name: Customer
Sold byFilterbuy
4 out of 5 stars
4 out of 5 stars review

One size doesn't fit all

Why is their no standard sizing for these things? Different brands have different sizes, so fit better than others. Filterbuy is a bit smaller than comparable Filtrete of the same size, they all have their interpretation of 20x25x4. These may be great filters, and I knew the actual size before I bought, just don't understand why there isn't a standard. Lot of space around these compared to my filtrete.

Review from Filterbuy
Helpful?5Q874HJWURT2902092881
May 13, 2026
Reviewer name: Customer
Sold byFilterbuy
2 out of 5 stars
2 out of 5 stars review

Not as snug as the OEM filter

This filter was about 1/4 inch shorter than the filter that came with the HVAC unit. I needed to pad the underside with strips of with cardboard, so that it would fit snugly up to the top of the slot, since air travels across the top.

Review from Filterbuy
Helpful?5Q874HJWURT2902092881
Current price is $42.95
Price when purchased online
  • Free shipping
  • Free 30-day returns
Subscribe, Your usuals, on your schedule, Save time and stay stocked!, $42.95
Your usuals, on your schedule
Save time and stay stocked!
One-time purchase $42.95

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Sold and shipped by FilterbuyPro Seller
4.592896781354051 out of 5 stars
4.592896781354051 stars out of 5, based on 4505 seller reviews(4.6)
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