Honeywell Filter Made for Aprilaire 2400
The Aprilaire model 2400 can also accept the Honeywell PopUp2400 filter, replacing the 401 filter. Honeywell has designed the Merv 11 Popup filter to replace the Aprilaire 401 filter. The Honeywell filter slides right in to the 2400 steel frame. The Aprilaire plastic housing and pleat spacers are not needed. Eliminating the messy disassembly and assembly of the 401.