Filterbuy 20 x 20 x 4 in MERV 13 Pleated HVAC AC Furnace Air Filter 2-Pack for Smoke Defense
Filterbuy 20x20x4 Air Filter MERV 13 Smoke Defense, Pleated HVAC AC Furnace Filter Replacement, 2-Pack
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Filterbuy 20x20x4 Air Filter MERV 13 Smoke Defense, Pleated HVAC AC Furnace Filter Replacement, 2-Pack

|3,332 ratings

Key item features

  • UNIVERSAL COMPATIBILITY: 20x20x4 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 3.63"), also compatible with White Rodgers (ACM1600M, ACM1600M-108, FR1600-100, FR1600M-108, FR1600M-111)
  • 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 11 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

4.4 out of 5 stars
stars
3,332 ratings1,446 reviews
How item rating is calculated
  1. 5 stars76% (2,544)
  2. 4 stars8% (260)
  3. 3 stars6% (191)
  4. 2 stars4% (121)
  5. 1 star6% (216)
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Showing 1-3 of 1,446 reviews

Jun 13, 2026
Reviewer name: Ken
Sold and shipped byFilterbuy
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

Very high MERV; much higher than most other filters. It measures exactly as it is specified in the details - less than 4 inches in width. Many "4 inch" width filters are actually 4.25 or 4.4 inches, so they do not fit my filter box. Good and sturdy quality!

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Jan 8, 2026
Reviewer name: Shea
Sold and shipped byFilterbuy
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

thick filters are effective

I placed this on a 20x20 box fan and sealed the sides with duct tape to act as a large air purifier for secondhand smoke. It seems to be working well.

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Helpful?2XSBNITBQAQ8145662492
Jul 9, 2026
Reviewer name: Tisha
Sold and shipped byFilterbuy
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

IT WAS JUST AS EASY TO INSTALL AS OTHER FILTERS.

Incentivized Review
Helpful?2XSBNITBQAQ8145662492
Current price is $59.98$15.00/in
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Sold and shipped by FilterbuyPro Seller
4.593524392911836 out of 5 stars
4.593524392911836 stars out of 5, based on 4571 seller reviews(4.6)
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