GeneralAire 3FM1625 / 4521 MERV 8 16x25x3 Pleated Media Filter

Made in USA

Quality Alternative ($18.66/filter)

  • 5 stars
  • (9)
  • MERV 8, Made in the USA
  • Recommended
List Price $111.98

Our Price: $55.99

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GeneralAire 4521

  • MERV 8
List Price $107.99

Our Price: $53.99

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  • Product Overview
  • Reviews

The genuine OEM GeneralAire 3FM1625 / 4521 MERV 8 Pleated Media Filter is designed for use in the GeneralAire MAC1200 and MAC1200M whole house air cleaner cabinets.

GeneralAire 3FM1625 Air Filter Specifications:
  • Nominal Size: 16" x 25" x 3"
  • Actual Size: 15-1/2" (15.5") x 24-1/4" (24.25") x 3"
  • MERV Rating: 8
  • Filter Life: 6 to 12 months depending on air quality
GeneralAire 4521 Air Purifier Filter Compatible Model/Part Numbers:
  • 14164
  • 255649-101, 229990-101
  • 3FM1625
  • 4521, 4520
  • MAC1200, MAC 1200 Series, MAC1200M
  • SBTRABC40, SBTRABCMQP
GeneralAire 4521 Whole House Air Cleaner Filter is also known as:
  • GeneralAire 3FM1625 MERV 8 Filter Media Cartridge.
  • GeneralAire 3FM1625 Filter Media 16 x 25 x 3.
  • 3FM1625 16 x 25 x 3 RESERVEPro Air Filter.
  • GeneralAire 3FM1625 16" X 25" X 3" #4521 RESERVEPro MERV 8 Pleated Air Filter.

0 out of 0 people found this review helpful.
5.0 Stars

Good company, easy to use website

By Man in 60s and over from Mishawaka, IN on 6/30/2020 3:53:42PM

Love the filters I get. They fit very well and do a great job. Website is easy to navigate and the service is great also.

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0 out of 0 people found this review helpful.
5.0 Stars

Filters

By Anonymous on 11/27/2023 2:48:15AM

Fit perfect this is my first order I will shop here again

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0 out of 0 people found this review helpful.
5.0 Stars

Great Service!

By Female in 60s and over from Canton Township, MI on 7/15/2025 8:24:07AM

Not only is the product super, but so is the service we get from AllFilters. The web site is easy to shop and delivery is always exactly as they promise. We depend on the quality of these filters to keep our furnace running cleanly and our air quality good!

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0 out of 0 people found this review helpful.
5.0 Stars

Couldn't be better

By Man in 40s from Davidsonville, MD on 7/23/2020 7:54:55AM

Shipping is crazy fast. Filters are money!

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0 out of 0 people found this review helpful.
5.0 Stars

Good price

By Male in 60s and over from Pekin, IL on 10/26/2022 10:27:50AM

Good filter,good price.

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0 out of 0 people found this review helpful.
5.0 Stars

Great product, great customer service

By Male in 50s from Clarkston, WA on 5/20/2025 11:57:45PM

Great quality product, promptly shipped. Great communication from seller making sure the product arrived on time and in good shape. Thank you!

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0 out of 0 people found this review helpful.
4.5 Stars

Home filters

By Male in 40s from Louisville, KY on 2/15/2023 10:57:20AM

Perfectly well constructed

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0 out of 0 people found this review helpful.
4.5 Stars

Smooth process

By Man in 60s and over from Hookset, NH on 10/1/2020 8:34:35AM

Not sure have not installed as of yet. Looks fine.

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