Original window trade vintage catalog for IDEAL VENTILATOR COMPANY. Main office and plant was located at 160 Atlantic Avenue, Providence, RI. Manufacturers of Glass Window Ventilators. Especially adapted for schools, hospitals, and large buildings. Recommended by architects, engineers, contractors and boards of education. Metal brackets for framed or plate glass. Unbound from a large 1941 architectural catalog, this unique old one page technical brochure would display wonderful matted and framed. Nice graphics. A fabulous addition to your retro window ventilation library.