As we see, Aprilaire 501 Replacement Filter is designed for effective contaminant removal from your air stream.

• Manufacturer: Research Products Corp.
• Brand Name:   Aprilaire
• Description:   Aprilaire Replacement Filter Media # 501  (2-Pack)
• Part Number: 501
• Compatibility: Aprilaire 5000
• Nominal Size:  16″ x 25″
• MERV Rating: SUPERSEDED TO MERV 16

 Features:

• Traps 99% of airborne pollen, mold and spore-sized particles
• Eliminates 98% of airborne bacteria-sized particles
• Removes 94% of dust the EPA reports can trigger asthma
• Lasts 12 months (Depending on the operation of your heating and/or air conditioning system)

This filter is sold under the following brand and part numbers:

 
This filter fits the following equipment: