Filter Bases & Cabinets

Furnace Box 17" x 28" x 18" (16" x 25" Filter)
- Item: FB1728
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Furnace Box 21" x 28" x 18" (20" x 25" Filter)
- Item: FB2128
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Furnace Box 24" x 28" x 18" (20" x 25" Filter)
- Item: FB2428
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Furnace Filter Base 24 in. x 24 in. x 1-2 in.
- Item: ACGE2424
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Aprilaire Whole-Home Air Purifier
- Item: Aprilaire WHAP
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Furnace Filter Base 20" x 25" x 4" (for 4" Filters)
- Item: FBGF20256-CA
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