Sweet’s indexed catalogue of building construction for the year 1906 (1906)
New York : Chicago : Architectural Record · leaf 571
circulation, the vitiated air being replaced by the fresh pure air. They do not interfere with the movement of the window sash. Sizes: 3, 5, 7, and 10. Made in any desired finish. In old buildings these ventilators are installed in panel equipment, which requiresno alteration. They can be easily… … WINDOW VENTILATORS(Inlet and Outlet) RADIAL VENTILATOR UNI-VALVE LOUVREVENTILATOR In ordinary rooms Radial Ventilators are placed about 15 from ceiling, actingas an inlet, the mid-feather controlling the currents. The Louvres are radiating. The Uni-Valve Louvre is placed about 15 from the floor…
Building materials
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