Original heating trade vintage catalog for THE BURT MANUFACTURING COMPANY. Main office was located at 600 Main Street, Akron, OH. Manufacturers of roof damper and fan ventilators. Chart with dimensions and weights is provided. Unbound from a large 1933 architectural catalog, this unique old two page technical brochure would display beautifully matted and framed. A fantastic addition to your retro ventilation equipment library. Pages are detached and contain a small amount of residual glue. Damp stain on page edges, with some bleed through.