Original heating trade vintage catalog for PENN VENTILATOR COMPANY, INC. Main office was located at Goodman Street above Allegheny Avenue, Philadelphia, PA. Manufacturers of Roof Ventilators. Products include Domex roof exhausters, direct and v-belt drive, Dynafan exhaust system with Pyrotrol heat shield. Gravity ventilators of Pul-air Ridge, Turbine, Pullman, Royal, Pul-Air, Liberty are shown. Unbound from a large 1958 architectural catalog, this unique old eight page technical specifications brochure would display beautifully matted and framed. Nice cover graphics. A marvelous addition to your retro ventilation equipment library. Pages are detached and contain a small amount of residual glue on edge.