Original heating trade vintage catalog for ILG ELECTRIC VENTILATING COMPANY. Main office was located at 2838 N. Pulaski Road, Chicago, IL. Manufacturers of roof and wall power ventilators. Type PRV, PRV-L, CRF, L-LSQ, L-SRQ, SB and CWF. Numerous images, illustrations, advantages, features and specifications are discussed. 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 fantastic addition to your retro ventilation equipment library. Pages are detached and contain a small amount of residual glue on edge.