AIRx 21.5x27.5x5HW-ALLERGY | Our#: 178442

21.5x27.5x5 AIRx ALLERGY Honeywell FC100A1045 Replacement Air Filter - MERV 11

1 review(s)
Average rating 5.0/5
5 stars
4 stars
3 stars
2 stars
1 star

AIRx 21.5x27.5x5HW-ALLERGY | Our#: 178442

  •  Fast Shipping & Free Returns
  •  100% Compatibility Guarantee

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: 21¼" x 27¼" x 4⅜"

3 people in your area recently purchased this product!

  •  Fast Shipping & Free Returns
  •  100% Compatibility Guarantee
Frequently Purchased Together

Product Details

21.5x27.5x5 AIRx ALLERGY Honeywell FC100A1045 Replacement Air Filter - MERV 11

In affordable alternative to the factory original filters, these high quality filters capture and hold pollutants inside the filter, allowing clean air to flow freely through the system.


  • Aftermarket product, designed to replace the original FC100A1045
  • Moisture resistant frame remains sturdy even in high humidity
  • Rust resistant galvanized wire downstream gives the filter rigidity and holds media in place after installation
  • Built-in support fingers hold pleats in place and allow for maximum dust holding
  • For optimum system performance, replace the filter every six months
  • MERV 11 rating means the filter attracts common large household allergens like dust, pollen, and mold spores as well as smaller particulate

Fits Honeywell Series:

  • F27F


  • 207583

Do you want to know about the technical specs?

Nominal Dimensions
21½ x 27½ x 5"
Actual Dimensions
21¼ x 27¼ 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.