Filterbuy 18x20x1 Air Filter MERV 13 Smoke Defense, Pleated HVAC AC Furnace Filter Replacement, 6-Pack
Filterbuy 18x20x1 Air Filter MERV 13 Smoke Defense, Pleated HVAC AC Furnace Filter Replacement, 6-Pack
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Filterbuy 18x20x1 Air Filter MERV 13 Smoke Defense, Pleated HVAC AC Furnace Filter Replacement, 6-Pack

|9,706 ratings

Key item features

  • UNIVERSAL COMPATIBILITY: 18x20x1 replacement air filters for your furnace, air conditioner, or heat pump enhance HVAC system efficiency and support a healthy lifestyle (actual size: 17.50" x 19.50" x 0.75")
  • MERV 13 PERFORMANCE: Protect your home or business from germs, bacteria, and more with MERV 13 synthetic media (comparable with MPR 1900 & FPR 10) that captures 98% of dust without restricting air flow
  • LONG-LASTING FILTRATION: Electrostatically charged media with 16 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

4.7 out of 5 stars
stars
9,706 ratings3,374 reviews
How item rating is calculated
  1. 5 stars85% (8,207)
  2. 4 stars7% (694)
  3. 3 stars3% (269)
  4. 2 stars1% (137)
  5. 1 star4% (399)
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Showing 1-3 of 3,374 reviews

Jun 25, 2026
Reviewer name: Customer
5 out of 5 stars
5 out of 5 stars review

I am very happy with

I am very happy with my filters. I needed an unusual size. I previously had to buy 3 smaller ones and duct tape them together every 3 months. Your filters came quickly, damage free, and is a much better quality. It took less than 30 seconds to change out and I noticed a difference in my air quality that same day. I bought a year's supply, so I will definitely be buying again next year!

Review from Filterbuy
Helpful?19PWUGF33PTL170294622
Jul 19, 2026
Reviewer name: Customer
5 out of 5 stars
5 out of 5 stars review

Great home filters at a great price. . .

Great deal on these filters. We have three rescue cats, one of which I am allergic to. I've noticed less issues since switching to this brand. I change my filters every 45-60 days and noticed the filter went in bright blue and came out a medium gray color.

Review from Filterbuy
Helpful?19PWUGF33PTL170294622
Aug 25, 2026
Reviewer name: Customer
5 out of 5 stars
5 out of 5 stars review

20 x 20 x1 and 10 x 10 x Merv 13

These Filters MERV 13 20" X 20" X 1" are the best filters for fitment, size (custom), and material for filtration. Will continue to purchase them! The same to be said about the 10" x 10" x 1". .

Review from Filterbuy
Helpful?19PWUGF33PTL170294622
Current price is $57.96
Price when purchased online
  • Free shipping
  • Free 30-day returns
Subscribe, Your usuals, on your schedule, Save time and stay stocked!, $57.96
Your usuals, on your schedule
Save time and stay stocked!
One-time purchase $57.96

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Sold and shipped by FilterbuyPro Seller
4.592502756339581 out of 5 stars
4.592502756339581 stars out of 5, based on 4535 seller reviews(4.6)
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