AIRx 20x25x5HW-ALLERGY | Our#: 177904

20x25x5 AIRx ALLERGY ReservePro 4356 Replacement Air Filter - MERV 11

AIRx 20x25x5HW-ALLERGY | Our#: 177904

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Reduce common allergy symptoms

  • Reduces allergy irritating particles
  • Captures allergens like dust, mold spores, pet dander, dust mite debris and more
  • Lessens odors from car fumes & smog
  • Creates cleaner indoor air
  • Actual Dimensions: 19¾" x 24¾" x 4⅜"

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Frequently Purchased Together

Product Details

Replacement for ReservePro # 4356 Air Filter - 20" x 25" x 4-3/8" (2-Pack )

Actual Size - 19-7/8" X 24-7/8" X 4-3/8"

Constructed from a highly efficient pleated synthetic media in a sturdy beverage board frame. Can be used in air cleaners made by several manufacturers, including Bryant, Carrier and Honeywell.

Replaces GeneralAire filters # GA100A37, GFI#4356
Replaces Honeywell Filter # FC100A1037


  • MERV 11 Rating
  • Remains sturdy even in high humidity areas due to a moisture resistant frame
  • Foam gasket helps to seal it in place and prevent dust from circumventing the filter
  • Built-in support holds the pleats in place to allow for maximum dust filtration
  • Rust resistant galvanized wire downstream gives the filter rigidity and holds media in place after installation

Do you want to know about the technical specs?

Nominal Dimensions
20 x 25 x 5"
Actual Dimensions
19¾ x 24¾ x 4⅜"
Filter Media
Electrostatically charged 100% synthetic gradient media that does not support microbiological growth
Filter Support Grid
30 gauge galvanized expanded metal grid
Moisture resistant double-wall beverage board
Max Temperature
180F (82C) continuous service, peak 225F (107C)
Max Humidity
Resistant to 100% R.H.

Replaces These Filters:

National Filter Sales: