Filterbuy 18x20x1 Air Filter MERV 13 Smoke Defense, Pleated HVAC AC Furnace Filter Replacement, 4-Pack
Filterbuy 18x20x1 Air Filter MERV 13 Smoke Defense, Pleated HVAC AC Furnace Filter Replacement, 4-Pack
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Filterbuy 18x20x1 Air Filter MERV 13 Smoke Defense, Pleated HVAC AC Furnace Filter Replacement, 4-Pack

|16.8K 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
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 Mon, Aug 31
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Sold and shipped by FilterbuyPro Seller
4.593360071301248 out of 5 stars
4.593360071301248 stars out of 5, based on 4488 seller reviews(4.6)
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4.6 out of 5 stars
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16.8K ratings5,999 reviews
How item rating is calculated
  1. 5 stars82% (13.8K)
  2. 4 stars7% (1,256)
  3. 3 stars4% (603)
  4. 2 stars2% (337)
  5. 1 star5% (806)
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Showing 1-3 of 5,999 reviews

Jun 25, 2026
Reviewer name: Customer
Sold byFilterbuy
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?7G5N5OQUNFIB137552673
Jun 8, 2026
Reviewer name: Customer
Sold byFilterbuy
5 out of 5 stars
5 out of 5 stars review

I purchased 4 of these

I purchased 4 of these last year but didn't create an acct. I didn't pay close attention but I thought the pleats were evenly spaced. These, that I purchased this year are not. The one that measured range from a1/2" to 1-1/2'. and they are placed in the frame crooked. I have an old flip phone and cannot provide you with pictures nor video. otherwise, a GREAT filter!!

Review from Filterbuy
Helpful?7G5N5OQUNFIB137552673
Jul 19, 2026
Reviewer name: Customer
Sold byFilterbuy
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?7G5N5OQUNFIB137552673