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How many smoke vents are recommended for a building?

VELUX always recommends checking with local fire code officials to ensure proper smoke vent coverage. The typical rule of thumb is 1% of the roof envelope for most applications or 2% if there is high pile storage or more flammable enviroment. In projects where smoke vents are being replace a permit might be needed due to the life safety factor which smoke vents fall in. Please contact your Commercial Rep for more information.