Replacement filter insert fits Aprilaire and Space-Guard furnace model numbers 2200, 2250.
Replaces original Space-Gard part number 201.
Fits Lennox Models: PMAC20C, PMAC-20C
This is an accordian-style standard filtration replacement that expands to fit inside your filter frame assembly.
Original part number SGM, 201.
Aftermarket, NOT made by Lennox