Filtrete 4" Ultra Allergen Reduction Deep Pleat Air Filter - 1550 MPR, 4-Pack


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Filtrete Ultra Allergen Reduction - 4IN, 4PK :
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Ships in 5 to 6 business days.

The Filtrete 4" Ultra Allergen Reduction Deep Pleat Air Filter - 1550 MPR, 4-Pack replacement air filter uses deeper pleats than comparable 1-inch filters which results in a higher surface area and better spread of dirt and debris. Compare this to smaller filters that are more likely to lose air flow as the filter media loads. With Filtrete's 3-in-1 technology you get higher flow rates with a long lasting tightly woven fibrous filter media. Replacing air filters regularly can help diminish the amount of dust, pet dander, mold, pollen, and smoke, to name a few, found in the air and settled on surfaces. With a 4-inch air filter you will be moving high volumes of air across the filter media where more contaminants can become trapped. As these pollutants stick to the filter media airflow will remain strong for long after installation. For optimal performance, filter should be checked monthly and replaced ever 3 to 6 months depending on air quality.


  • Brand: 3M Filtrete
  • Part Numbers:
    • NDP01-4IN-4 (16x25x4)
    • NDP02-4IN-4 (20x20x4)
    • NDP03-4IN-4 (20x25x4)
  • Dimensions:
    • 16x25x4
    • 20x20x4
    • 20x25x4
  • Pack Size: 4
  • Filter Life (Months): 6 - 9
  • MPR Rating: 1550
  • Designed with exclusive Filtrete Brand 3-in-1 technology from 3M to pull in and trap unwanted air particles while letting cleaner air flow through
  • Attracts and captures microscopic particles like smoke and smog and large allergens like pollen from the air passing through the filter
  • Outperforms fiberglass, washable and non-electrostatic 3-month pleated 1" filters

Available Sizes:

  • 16 x 25 x 4 (NDP01-4IN-4)
  • 20 x 20 x 4 (NDP02-4IN-4)
  • 20 x 25 x 4 (NDP03-4IN-4)


Customer Reviews:

Total Reviews: 2 | Average Rating: 3.5 / 5.0

Patrick Mccracken2022-11-28

You ship FED EX and delivery person left product on front walk, it could easily be stolen or worst, if it rained the product would have been ruined. How would you handle that?

Collected by
Diane Malczyk2022-08-14

Expensive but we’ll worth the cost.

Collected by

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