Original heating trade vintage catalog for THE SWARTWOUT COMPANY, was located at 18515 Euclid Avenue, Cleveland, OH. Choosing a Ventilator. Dexter Heat Valve for lowering building temperatures and Rotary Bronze Ball Bearing Ventilators. Unbound from a large 1936 architectural catalog, this unique old one page technical brochure would display beautifully matted and framed. Nice graphics. A marvelous addition to your retro ventilation equipment library.