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  • Genuine Aprilaire # 401 Media Filter
  • Actual Dimensions:  Approximately 15 3/8" x 26 15/16" x 6"
  • MERV 10
  • Fits Model 2400
  • Subs for Lennox filter X0444
Price: Price: $39.00



This is the genuine Aprilaire # 401 replacement filter media for Aprilaire and Space-Gard air cleaner model 2400. Designed to last up to one to year.

Save when you buy two or more! Your best value is on a full case of 10, which you may purchase by clicking the link below.

Actual Dimensions

Actual Dimensions: Approximately 15 3/8" x 26 15/16" x 6" expanded

Nominal Size: 16x25x6

Fits These Models

Aprilaire and Space-Gard: 2400 

Lennox: PMAC-12C

Subs for These Part Numbers:

Lennox: # X0444

Other Specs

Recommended Replacement: Every 12 months, under normal operating conditions; more frequently in high dust environments

Other Stock Numbers: RP401, DRP401, DSG401, RES401, REP401, DPFS2400AA

Number of questions: 0