Filtrete 18x20x1 HVAC Furnace Air Filter, MPR 1000 MERV 11, Allergen Defense, 1 Filter
Filtrete 18x20x1 HVAC Furnace Air Filter, MPR 1000 MERV 11, Allergen Defense, 1 Filter
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Filtrete 18x20x1 HVAC Furnace Air Filter, MPR 1000 MERV 11, Allergen Defense, 1 Filter

4.7 stars out of 595 reviews
(4.7)|
595 ratings

Key item features

  • Optimal Filtration: This 18x20x1 pleated HVAC furnace air filter features a 1000 MPR and MERV 11 rating, effectively capturing numerous microparticles and larger particles like dust, lint, and allergens.
  • Advanced Technology: Designed with exclusive Filtrete 3-in-1 technology, it efficiently pulls in and traps unwanted particles, allowing cleaner air to circulate throughout your home.
  • Health Certified: The filter is CERTIFIED asthma and allergy-friendly, contributing to a cleaner and fresher home environment by reducing common household allergens.
  • Versatile Application: Suitable for use in furnaces, air conditioners, heating systems, and general HVAC systems, offering broad compatibility for home air filtration needs.
  • Maintenance Reminder: For optimal performance, the filter should be changed at least every 90 days, with the Filtrete Smart App available to set convenient replacement reminders.
  • Trusted Brand: Filtrete is recognized as North America's most trusted brand of HVAC filters, based on a 2024 Sago US Brand Health Survey.
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4.7 out of 5 stars
stars595 ratings510 reviews
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Showing 1-3 of 510 reviews

Mar 5, 2026
Whippetartist
5 out of 5 stars review

Verified Purchase

Filtrete 3M 1000 Air A/C Filter Excellent

Filtrete 3M 1000 rating A/C filters I use on A/C in Florida apartment I rent. Works excellent to help remove pollen, mold, house mite residue. I change the filter every 30 days due to Florida pollen/mold high heat, high humidity seasons. During FL "winter" 1 filter can last about 3 months.

Helpful?24T6N7VIVPAW130384257
Mar 27, 2026
BigSpender
Item details
Size: 18" x 20" x 1"
5 out of 5 stars review

Verified Purchase

AC Filter

Good product, fair price.

Helpful?24T6N7VIVPAW130384257
Feb 27, 2026
WalmartCustomer
5 out of 5 stars review

Verified Purchase

The product, it's brand name, it's quality and the service met my highest expectations.

Incentivized Review
Helpful?24T6N7VIVPAW130384257