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What angle do single leaf roof mounted smoke vents need to open?

Single leaf roof mounted smoke vent must open to a minimum of 140˚ in accordance with EN12101-2: 2003 Smoke & Heat Control Systems – Part 2, Specification for Natural Smoke & Heat Exhaust Ventilators.  Whitesales Em-Vent smoke vents open to 160˚ to provide maximum Aerodynamic Area (Aa).

Single leaf roof mounted smoke vent must open to a minimum of 140˚ in accordance with EN12101-2: 2003 Smoke & Heat Control Systems – Part 2, Specification for Natural Smoke & Heat Exhaust Ventilators.  Whitesales Em-Vent smoke vents open to 160˚ to provide maximum Aerodynamic Area (Aa).

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