• Manufacturer: Research Products Corp.
• Brand Name:   Aprilaire
• Description:   Aprilaire Replacement Filter Media # 201  (2-Pack)
• Part Number: 201
• Compatibility: Aprilaire 2200, 2250  
• Nominal Size: 20" x 25" x 6"
• MERV Rating: MERV 11
• Lennox Healthy Climate: Cat # 52P70
• Coleman, Luxaire, Source1, York Part no.: S1-FM201

As we see, Aprilaire - 201 Replacement Filter is designed for Aprilaire Air Purifiers to ensure peak efficiency. Aprilaire 201 Air Filters fit the Air Purifier Model 2250 and Model 2200. Lasts one to two years depending on the operation of your heating and/or air conditioning system

This filter fits the following equipment:

 
This filter can also be used to replace any of the size-equivalent filters listed below. Specifications may differ.