Filterbuy 18x24x1 Air Filter MERV 11 Allergy Defense, Pleated HVAC AC Furnace Filter Replacement, 4-Pack
Filterbuy 18x24x1 Air Filter MERV 11 Allergy Defense, Pleated HVAC AC Furnace Filter Replacement, 4-Pack
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Filterbuy 18x24x1 Air Filter MERV 11 Allergy Defense, Pleated HVAC AC Furnace Filter Replacement, 4-Pack

|12K ratings

Key item features

  • UNIVERSAL COMPATIBILITY: 18x24x1 replacement air filters for your furnace, air conditioner, or heat pump enhance HVAC system efficiency and support a healthy lifestyle (actual size: 17.38" x 23.38" 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

Specs

Air filter size, 18 x 24 x 1Minimum efficiency reporting values (merv), 11Contaminants removed, DustBrand, FilterbuyFeatures, ElectrostaticMicroparticle performance rating, 1200

About this item

Product details

The Filterbuy replacement air filter 18x24x1 (actual size: 17.38" x 23.38" x 0.75") ensures that your furnace, air conditioner, heat pump, or HVAC system is circulating the cleanest air possible to help preserve your budget and healthy lifestyle. MERV 11 synthetic media (comparable with Micro Allergen Defense MPR 1200 & FPR 7) is recommended if you have pets or allergies with its capability to trap 95% of dust particles while protecting your home or business from smoke, smog, lint, pollen, mold, dander, and other forms of debris without impacting air flow. High quality construction features an electrostatically charged design with 14 pleats per foot that captures more harmful particles and prolongs the products lifespan by three times that of fiberglass models (replace every 90 days for best results). Plus, our industrial grade beverage board frames are paired with dual wire backings that significantly outperform traditional cardboard compositions by improving structural integrity with their ability to endure temperatures up to 200 degrees Fahrenheit and withstand exposure to moisture. Installation is also made simple with the addition of easy-to-understand arrows that help identify the direction of air flow and subsequently the way the filter needs to be placed. To top it off, all our components are 100% manufactured within the United States and designed with recyclable materials, providing an eco-friendly alternative to enhancing your air quality.
  • UNIVERSAL COMPATIBILITY: 18x24x1 replacement air filters for your furnace, air conditioner, or heat pump enhance HVAC system efficiency and support a healthy lifestyle (actual size: 17.38" x 23.38" 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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Specifications

Air filter size

18 x 24 x 1

Minimum efficiency reporting values (merv)

11

Contaminants removed

Dust

Brand

Filterbuy

Warranty

Warranty information

Defective items and products that were shipped incorrectly are subject to a refund or replacement on a case by case basis. Please contact our customer support team for more information if you experience any issues.

Please be aware that the warranty terms on items offered for sale by third party Marketplace sellers may differ from those displayed in this section (if any). To confirm warranty terms on an item offered for sale by a third party Marketplace seller, please use the 'Contact seller' feature on the third party Marketplace seller's information page and request the item's warranty terms prior to purchase.

Customer ratings & reviews

4.7 out of 5 stars
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12K ratings4,124 reviews
Includes global ratings and reviews
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Showing 1-3 of 4,124 reviews

Nov 7, 2026
Reviewer name: Customer
5 out of 5 stars
5 out of 5 stars review

Quality, Selection and Price

I've been using FilterBuy for a long time. I find their products to be of equal or higher quality than most major brands. They do not try to up-sale products, they give you the choices, inform you of the differences and let you make the choice. I can't even remember the last time I purchased anything else, it doesn't make sense. Simple and strait forward.

Review from Filterbuy
Helpful?0Y0WQZQ90AB0161591349
Oct 31, 2026
Reviewer name: Customer
5 out of 5 stars
5 out of 5 stars review

Great price for these filters will buy again

Purchased a 3 Month supply for our home. We prefer to purchase in bulk. The price for the 6 filters was cost effective was great compared to our local big box store! The filters fit just as they should. The MERV 11 rating was recommended per the manufacturer, I like that it will support our home needs by filtering out dust and allergens!

Review from Filterbuy
Helpful?0Y0WQZQ90AB0161591349
Nov 2, 2026
Reviewer name: Customer
5 out of 5 stars
5 out of 5 stars review

Pleasantly surprised

I waited a while to use the new filters since I had just replaced them. I didn't even open the box. I did the filter change today and opened the box and was pleasantly surprised by how sturdy and well constructed the filters were. I'll tell you more about their performance when my next filter change comes up.

Review from Filterbuy
Helpful?0Y0WQZQ90AB0161591349
Current price is $51.96
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Sold and shipped by FilterbuyPro Seller
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4.6 stars out of 5, based on 4794 seller reviews(4.6)
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