Original heating trade vintage catalog for BICALKY FAN COMPANY, was located in Buffalo, NY. Manufacturers of air washers, fans, blowers, roof ventilators and humidifiers. Steel plate, bi-multi fans specified by leading engineers and architects. Disbound from a large 1916 industrial heating catalog, this unique old one page technical brochure would display wonderfully matted and framed. A marvelous addition to your retro industrial equipment library. Pages are detached and may contain a small amount of residual glue on edge.