Aprilaire 401 Air Filter (16 x 25in, MERV: 10)

Aprilaire 401 Air Filters are designed for best efficiency and are the heart of your air purifier.

• Aprilaire Filter for the Aprilaire Model 2400 Air Purifier
• High-efficiency MERV 10 rating
• Lasts one to two years (Depending on the operation of your heating and/or air conditioning system)