Original heating trade vintage catalog for HIRSCHMAN-POHLE COMPANY, INC. Was located in Le Roy, NY. Branch office was located in Lackawanna, NY. Manufacturers of roof ventilators. Products include power type, wind syphon, wind driven and electric. Bases and curbs are discussed. Leroy Electric exhaust or intake showing self acting dampers, type CK are two new ventilators. Capacity charts, standard dimensions and specifications are provided. Unbound from a large 1958 architectural catalog, this unique old twelve page technical specifications brochure would display beautifully matted and framed. Nice cover graphics. A fantastic addition to your retro ventilation equipment library. Pages are detached and contain a small amount of residual glue on edge.