Original heating trade vintage catalog for THE BUCKEYE BLOWER COMPANY. Main office and factory was located in Columbus, OH. Manufacturers of Heatovent Heating and Ventilating Unit for Schoolrooms, Lodges, Banks and Churches. Cross section view of 100 series unit recessed depth of one brick. Disbound from a large 1931 industrial heating catalog, this unique old three page technical brochure would display wonderfully matted and framed. A marvelous addition to your retro heating equipment library. Slight damp stain on outer edge.