Original heating trade vintage catalog for HART & COOLEY MANUFACTURING COMPANY. Main office and factory was located in Holland, MI. Manufacturers of Air Conditioning Registers and Grilles, Warm Air, Damper Regulators, Furnace, Pulleys, Chain. Perforated Lattice, Vertical bar Close Mesh, No. 71, 77, 84, 90. Disbound from a large 1938 home builders heating catalog, this unique old one page technical brochure would display wonderfully matted and framed. A marvelous addition to your retro heating equipment library.