AIRx 16x20x4-DUST | Our#: 178121

16x20x4 AIRx DUST White Rodgers FR1000M-108 Replacement Air Filter - MERV 8

AIRx 16x20x4-DUST | Our#: 178121

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Enjoy a cleaner home with less work

  • Reduces dust, lint, dust mites, pollen
  • Will help keep your HVAC system clean
  • Maintains superior airflow
  • Creates cleaner indoor air
  • Actual Dimensions: 15 ⅜" x 19 ⅜" x 3 ⅝"

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Product Details

Replacement for White Rodgers FR1000M-108- Rated MERV 8. 

16x20x4 (actual size 15-3/8" X 19-3/8" X 3-5/8")

Aftermarket replacement for 4" premium whole house air cleaners from White-Rodgers. 


  • Same size as filter part # FR1000M-108
  • Fits in Air Cleaner Model ACM1000M
  • MERV 8 Rating
  • Attracts common large household allergens like dust, pollen, and mold spores
  • Save money by purchasing a "generic" aftermarket product.  Not manufactured by White-Rodgers 
  • Durable construction for easy, slide-in replacement
  • Disposable for convenience
  • Replace approximately every 6 months - depending on fan hours and environmental conditions

Do you want to know about the technical specs?

Nominal Dimensions
16 x 20 x 4"
Actual Dimensions
15 ⅜ x 19 ⅜ x 3 ⅝"
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: