Original heating trade vintage catalog for ILG ELECTRIC VENTILATING COMPANY. General office and factory was located at 2848 North Crawford Avenue, Chicago, IL. Manufacturers of Fans, Blowers, Exhausters and ILGair Unit Heaters. Self-Cooled Propeller Fan, Unit Coolers and Variable Air Controllers. For offices, stores, factories, restaurants and homes. Disbound from a large 1931 industrial catalog, this unique old one page technical brochure would display wonderfully matted and framed. A marvelous addition to your retro industrial heating equipment library. Slight damp stain on outer edge.