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Product Spec Sheet: 
66" x 144" Aluminum Cover & Galvanized Steel Quad Door LightMAX™ Smoke Vent, Rooftop Close
The Quad Door LightMAX Smoke Vent uses structural multi-wall white polycarbonate covers for sustainability and the benefit of daylighting. It offers options like electrical operations and colour panels to answer the requirements for fire and life safety. With its quad leaf configurations, it serves as an effective vent area on any commercial buildings. It also complies with UL standards as it has a fusible link that automatically opens at a standard temperature of 165°F. The cover uses aluminum and steel materials with 1-inch polyiso insulation. It even has an extruded EPDM adhesive-backed gasket seal to withstand any weather conditions.