Filterbuy 18x18x1 Air Filter MERV 8 Dust Defense, Pleated HVAC AC Furnace Filter Replacement, 1-Pack
Filterbuy 18x18x1 Air Filter MERV 8 Dust Defense, Pleated HVAC AC Furnace Filter Replacement, 1-Pack
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Filterbuy 18x18x1 Air Filter MERV 8 Dust Defense, Pleated HVAC AC Furnace Filter Replacement, 1-Pack

|20.5K ratings

Key item features

  • UNIVERSAL COMPATIBILITY: 18x18x1 replacement air filters for your furnace, air conditioner, or heat pump enhance HVAC system efficiency and support a healthy lifestyle (actual size: 17.75" x 17.75" 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

4.7 out of 5 stars
stars
20.5K ratings5,925 reviews
How item rating is calculated
  1. 5 stars87% (17.9K)
  2. 4 stars7% (1,377)
  3. 3 stars2% (400)
  4. 2 stars1% (213)
  5. 1 star3% (682)
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Showing 1-3 of 5,925 reviews

Oct 5, 2026
Reviewer name: Customer
5 out of 5 stars
5 out of 5 stars review

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?4L0U22PM6D7S1230523051
Aug 21, 2026
Reviewer name: Customer
5 out of 5 stars
5 out of 5 stars review

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?4L0U22PM6D7S1230523051
Oct 5, 2026
Reviewer name: Customer
5 out of 5 stars
5 out of 5 stars review

Excellent Filters

I have been a Filterbuy customer for more than five years. Their prices are absolutely the best and products are great. They ship promptly and I have never had an issue. I highly recommend them.

Review from Filterbuy
Helpful?4L0U22PM6D7S1230523051
Current price is $26.99
Price when purchased online
  • Free shipping
  • Free Holiday returns until Jan 31
Subscribe, Your usuals, on your schedule, Save time and stay stocked!, $26.99
Your usuals, on your schedule
Save time and stay stocked!
One-time purchase $26.99

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Arrives by Thu, Oct 15
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Sold and shipped by FilterbuyPro Seller
4.594171844868224 out of 5 stars
4.6 stars out of 5, based on 4667 seller reviews(4.6)
Extended holiday returns
Free Holiday returns until Jan 31