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Filterbuy 18x20x1 Air Filter MERV 8 Dust Defense, Pleated HVAC AC Furnace Filter Replacement, 4-Pack
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 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
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Customer ratings & reviews
How item rating is calculated
Reviews summary
Pros
- : Offers good quality at a competitive cost.
- : Made from sturdy materials with a perfect fit.
- : Allows for easy filter purchases.
- : Filter fits snugly in designated space.
- : Filter installation is a straightforward process.
Neutral
- : Can be robust, but also prone to bending or damage.
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Showing 1-3 of 6,120 reviews
Aug 21, 2026
Reviewer name: Customer
5 out of 5 stars
Great service and product!
I always hated buying furnace filters. Box stores were always expensive, if they had them in stock. Filterbuy is a very decent price for buying a years worth a time. I change my furnace filter monthly due to have a smaller filter and also with pets. The shipment is always very quick and comes well packaged. Highly recommend Filterbuy!
Review from Filterbuy
Helpful?3HCCGK5J6YBQ144105881
Sep 26, 2026
Reviewer name: Customer
5 out of 5 stars
I love working with this
I love working with this company. All I have to do is call they have my filter size already on file. Order them they're here the next day or two no problem love working with them. The wonderful person who answers the phone is so wonderful and very polite and extremely helpful.
Review from Filterbuy
Helpful?3HCCGK5J6YBQ144105881
Oct 5, 2026
Reviewer name: Customer
5 out of 5 stars
Great fit and easy install
The filter was the correct size and fit perfectly. It was easy to install and feels like good quality. I like that it came well packaged and was ready to use right out of the box. So far I'm very happy with it and would definitely use Filterbuy filters again.
Review from Filterbuy
Helpful?3HCCGK5J6YBQ144105881
Current price is USD$35.96
Price when purchased online
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Sold and shipped by Filterbuy|Pro Seller
4.594635193133048 out of 5 stars
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Free Holiday returns until Jan 31