Vanguard Smoke and Fire Curtains’ BLE ResQ Window features a UL-certified vision panel allowing first responders and occupants to see through the curtains to safely evacuate. Vanguard Fire and Smoke Curtains are installed in elevator hoistway entrances, corridors, doorways, building lobbies, atriums, and other spaces where people may travel as part of an egress evacuation route or areas that require a code-compliant smoke/fire protection device. The BLE RESQ Window is made of strong transparent fabric containing silicone resins that can withstand temperatures reaching 1832 F for up to 3 hours.