The Colt Group’s Coltlite natural louvered ventilator, available from The Bilco Co., installs in the façade of a building to provide day-to-day ventilation, as well as smoke control to aid building evacuation in the event of a fire. It is offered with a number of louver and control options. Models are available with double-pane louvers, single-pane louvers and aluminum louvers that can be specified with a powder-coat finish to match a building’s façade. Double-pane louvers also are available in a thermally broken design.