Original heating trade vintage catalog for PENN VENTILATING COMPANY. Main office and works was located at 2810-2812 Richmond Street, Philadelphia, PA. Manufacturers of Rotary, Ridge, Stationary, Power Ventilators. Products include Liberty Siphonage Ventilators, Turbine and Pul-Air Ventilators. Unbound from a large 1938 architectural catalog, this unique old two page technical specifications brochure would display beautifully matted and framed. Nice graphics. A marvelous addition to your retro ventilation equipment library. Pages are detached and contain a small amount of residual glue on edge.