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Genuine Aprilaire Replacement Filter Part No
Actual Size: 14 1/8" x 22" x 5 1/4"
1 - catalyst (PUREAIR CARTRIDGE)- Y6607
#4231 Yellow Orifice
York S1-MAC11202005 Part # 4556 / 4531 20x20x5. Actual Size 20 3/4" x 19 3/4" x 4 15/16" MERV 11 Case of 3 20x25x4 Genuine Aprilaire Replacement Filter PartAftermarket 20 x 20 x 5 Part # S1 MAC11202005 Pleated Filters Actual Size 20 3 4" x 19 3 4" x 4 15 16" MERV 11 Rated Also fits: S1 # S1 FM10202005, Source 1 # S1 MAC202005, Trion # 255649 103, Skuttle #448 3, Skuttle DB 0020 020, Air Bear Supreme 20x20, Generalaire MAC TWENTY, Generalaire #4531 Made in Canada by FurnaceFilters. Ca Case of 3
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