Original heating trade vintage catalog for AREX COMPANY, was located at 333 Michigan Avenue Building, Chicago, IL. Industrial Ventilating Engineers. Manufacturers of economy roof ventilator and economy fan unit, accelerated louver, exhaust fans and attic fan ventilator. Unbound from a large 1938 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 may contain a small amount of residual glue on edge.