Filterbuy 13x21.5x1 Air Filter MERV 8 Dust Defense, Pleated HVAC AC Furnace Filter Replacement, 3-Pack
Filterbuy 13x21.5x1 Air Filter MERV 8 Dust Defense, Pleated HVAC AC Furnace Filter Replacement, 3-Pack
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Filterbuy 13x21.5x1 Air Filter MERV 8 Dust Defense, Pleated HVAC AC Furnace Filter Replacement, 3-Pack

|20.4K ratings

Key item features

  • UNIVERSAL COMPATIBILITY: 13x21.5x1 replacement air filters for your furnace, air conditioner, or heat pump enhance HVAC system efficiency and support a healthy lifestyle (actual size: 12.88" x 21.50" 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

4.7 out of 5 stars
stars
20.4K ratings5,895 reviews
How item rating is calculated
  1. 5 stars87% (17.8K)
  2. 4 stars7% (1,370)
  3. 3 stars2% (396)
  4. 2 stars1% (210)
  5. 1 star3% (674)
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Showing 1-3 of 5,895 reviews

Aug 16, 2026
Reviewer name: Customer
5 out of 5 stars
5 out of 5 stars review

We decided to filter at

We decided to filter at the cold air returns rather that at the air handler. The goal was to reduce the amount of dust in the house. The 12x12x1 filters fit the returns perfectly. We've noticed no difference in air flow. It's too early to determine if there is less dust. The filters are of high quality. If the change we made in filter location works the way we want, we'll definitely be purchasing more from Filter Buy.

Review from Filterbuy
Helpful?31XH8AUKGW2D230581757
Jul 5, 2026
Reviewer name: Customer
5 out of 5 stars
5 out of 5 stars review

New filters

I ordered these when our furnace was working. It has now quit and we're getting a new furnace installed tomorrow and I have no idea what size it takes but I'm sure it will be the same as the old one. Can I return these and exchange them for the new size what I find out what it is?

Review from Filterbuy
Helpful?31XH8AUKGW2D230581757
Aug 21, 2026
Reviewer name: Customer
5 out of 5 stars
5 out of 5 stars review

They Fit.

I had a new unit installed and the fan runs continuously. But my electric usage is down. I have four cats and one large hairy dog; live in a dusty environment and need to change filters every two weeks. The big box store was charging almost a dollar more for a MERV 5 filter and I had to bend them to get them to fit, which left gaps along the sides. These filters fit and they cost quit a bit less than what I would have paid for a MERV 8 in store.

Review from Filterbuy
Helpful?31XH8AUKGW2D230581757
Current price is $39.99
Price when purchased online
  • Free shipping
  • Free 30-day returns
Subscribe, Your usuals, on your schedule, Save time and stay stocked!, $39.99
Your usuals, on your schedule
Save time and stay stocked!
One-time purchase $39.99

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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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