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Automatic opening vent systems are installed in buildings as an active fire protection measure. Opening vents allows smoke to dissipate out of a building providing a minor benefit to increase the visibility in the interior space to facilitate evacuation and aid manual firefighting efforts for a limited period of time. Most vents open via the operation of an electronic actuator, commanded from control gear that is interlinked with a fire alarm system. It is recommended that AOV systems are maintained on a six-monthly basis in order to ensure correct operation of vents upon activation of the fire alarm system. Franco Fire Detection offer Installation, Maintenance and Repairs of AOV systems.