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- Armstrong Air® Combustible Floor Base Kit, Downflow, 22 in W x 22-1/4 in D Floor Opening, For Use With: A801A Series 21 in Gas Furnace
- Floor Opening22 in W x 22-1/4 in DManufacturerAllied Air EnterprisesManufacturer #LB-95048CSuitable For Use WithA801A Series 21 in Gas FurnaceTypeDownflow
