Filterbuy 16x21x1 Air Filter MERV 11 Allergy Defense, Pleated HVAC AC Furnace Filter Replacement, 2-Pack
Filterbuy 16x21x1 Air Filter MERV 11 Allergy Defense, Pleated HVAC AC Furnace Filter Replacement, 2-Pack
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Filterbuy 16x21x1 Air Filter MERV 11 Allergy Defense, Pleated HVAC AC Furnace Filter Replacement, 2-Pack

|11.8K ratings

Key item features

  • UNIVERSAL COMPATIBILITY: 16x21x1 replacement air filters for your furnace, air conditioner, or heat pump enhance HVAC system efficiency and support a healthy lifestyle (actual size: 15.50" x 20.50" x 0.75")
  • MERV 11 PERFORMANCE: Protect your home or business from allergens, pets, and more with MERV 11 synthetic media (comparable with MPR 1200 & FPR 7) that captures 95% 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
11.8K ratings3,981 reviews
How item rating is calculated
  1. 5 stars85% (10K)
  2. 4 stars8% (935)
  3. 3 stars3% (312)
  4. 2 stars1% (148)
  5. 1 star3% (405)
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Showing 1-3 of 3,981 reviews

Sep 3, 2026
Reviewer name: Customer
5 out of 5 stars
5 out of 5 stars review

The quality of the cardboard

The quality of the cardboard used to stabilize the filter is far above anything I have bought at the big box stores. . I used to be in the HVAC industry so believe me when I say the cost is very reasonable. I will definitely be a customer for life. Thanks for making such a quality product. .

Review from Filterbuy
Helpful?3LLS167J376G993274960
Sep 27, 2026
Reviewer name: Customer
5 out of 5 stars
5 out of 5 stars review

So happy with these filters

My rental building gives me free filters but they were causing me to get lint all over my apartment. Im so happy I found Filterbuy. Better MERV than my old filters and no lint and dust all over everything. VERY happy!

Review from Filterbuy
Helpful?3LLS167J376G993274960
Oct 15, 2026
Reviewer name: Customer
5 out of 5 stars
5 out of 5 stars review

Durable. Seem well-built. Definitely better

Durable. Seem well-built. Definitely better than the off-the-shelf packs I had previously.

Review from Filterbuy
Helpful?3LLS167J376G993274960
Current price is $40.98
Price when purchased online
  • Free shipping
  • Free Holiday returns until Jan 31
Subscribe, Your usuals, on your schedule, Save time and stay stocked!, $40.98
Your usuals, on your schedule
Save time and stay stocked!
One-time purchase $40.98

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Arrives by Fri, Oct 23
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Sold and shipped by FilterbuyPro Seller
4.594600340136054 out of 5 stars
4.6 stars out of 5, based on 4704 seller reviews(4.6)
Extended holiday returns
Free Holiday returns until Jan 31