Filterbuy 18x30x1 Air Filter MERV 11 Allergy Defense, Pleated HVAC AC Furnace Filter Replacement, 6-Pack
Filterbuy 18x30x1 Air Filter MERV 11 Allergy Defense, Pleated HVAC AC Furnace Filter Replacement, 6-Pack
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Filterbuy 18x30x1 Air Filter MERV 11 Allergy Defense, Pleated HVAC AC Furnace Filter Replacement, 6-Pack

|11.6K ratings

Key item features

  • UNIVERSAL COMPATIBILITY: 18x30x1 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 29.75" 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
11.6K ratings3,913 reviews
How item rating is calculated
  1. 5 stars85% (9,920)
  2. 4 stars8% (922)
  3. 3 stars3% (305)
  4. 2 stars1% (148)
  5. 1 star3% (397)
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Showing 1-3 of 3,913 reviews

Aug 20, 2026
Reviewer name: Customer
5 out of 5 stars
5 out of 5 stars review

Affordable and effective

I love these filters. Affordable and effective. It's amazing to see how much they have collected when it's time to change them. The subscription service is great. A little extra savings and a subtle reminder that you forgot to change them. LOL. But I usually notice when it's time if I forget, I find myself sneezing and having itchy eyes in the house. Which always improves once I change them Highly recommend these and Filterbuy

Review from Filterbuy
Helpful?1M19Z5V1QQE4141491861
Jun 28, 2026
Reviewer name: Customer
5 out of 5 stars
5 out of 5 stars review

I always get really good

I always get really good service from Filter Buy. The filters are of high quality and work very well, I changed the filters approximately every 3 months and the system seems to work out really well. Thank you for a very high quality product. Thank you Mike

Review from Filterbuy
Helpful?1M19Z5V1QQE4141491861
May 16, 2026
Reviewer name: Customer
5 out of 5 stars
5 out of 5 stars review

Filters for Future Use

Purchased filters from area store but wanted standby filters for eventual change. Will try your brand to compare to make sure my nose is not dripping all of the time in our house. Yours will be used in the next two three month round - then I can be able to tell if it was worth it!

Review from Filterbuy
Helpful?1M19Z5V1QQE4141491861
Current price is $69.96$69.96/in
Price when purchased online
  • Free shipping
  • Free 30-day returns
Subscribe, Your usuals, on your schedule, Save time and stay stocked!, $69.96
Your usuals, on your schedule
Save time and stay stocked!
One-time purchase $69.96

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Arrives by Fri, Sep 11
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Sold and shipped by FilterbuyPro Seller
4.592502756339581 out of 5 stars
4.592502756339581 stars out of 5, based on 4535 seller reviews(4.6)
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