"This Hamilton Home Products Return Air Coil Box is a knock-down design and can easily be assembled and attached to the top of the mobile home electric furnace, Item#s 27436, 27437, 700250 and 700251. Includes a louvered front door with door and top return air filters. Material Type Steel, Mounting Hardware Included Yes, Mounting Type Top, Fuel Type Electric, Product Style Air returns, Color Galvanized, Length in. 22 3/4. Includes one 1in. x 20in. x 20in. door filter and one 2in. x 20in. x 24in. top filter For use with mobile home coils with a maximum height of 26in."
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