Aprilaire Upgrade Kit Replacement Frames for Whole House Air Purifiers

The Aprilaire 4897 Upgrade Kit Replacement Frames for Whole House Air Purifiers is designed for the 20" x 25" and 16" x 25" air cleaners that utilize a 4" thick cartridge filter including Honeywell, Trion, Carrier, General, Lennox and Ultravation media style air cleaners. Purchase this Aprilaire 4897 and then slide in the appropriate Aprilaire MERV 13 air filter, which is not included. Includes: 2 Frame Bases 4 Frame supports 1 Door Label