Original old heating trade vintage catalog for the AREX COMPANY. Main office and factory was located at 333 North Michigan Avenue Building, Chicago, IL. Factory and warehouse was located in Gary, IN. Arex-Austor Industrial Ventilating Engineers. Manufacturers of Air Exhauster Roof Ventilator and Economy Ventilator. Unbound from a large 1931 architectural catalog, this unique old two page technical specifications brochure would display beautifully matted and framed. Nice graphics. A fantastic addition to your retro ventilation equipment library. Pages are detached and contain a small amount of residual glue on edge.