Smoke and Heat Exhaust Ventilation:

If there is a building fire, the smoke formation and toxic combustion gasesrepresent the greatest danger for people. If fire breaks out, 9 out of 10 peopledie due to poisoning from inhaling extremely toxic flue gases. A closed roomis quickly completely filled with toxic smoke; people in the building are cut offfrom escape and emergency routes.For this reason, fast and reliable smoke extraction gains considerable importance.Smoke and heat exhaust ventilators (SHEV) effectively conduct thesmoke and fire gases out of the building and can thereby save lives. Controlledby fire-detecting sensors, they open areas in the upper wall or ceilingarea, through which the rising hot combustion gases can escape. On theother hand, a low-smoke layer forms in the lower area of a building, whichenables people to escape the fire-affected area and the fire brigade to godirectly to the fire source.Property within this low-smoke layer is largely protected from smoke andsoot. And the extraction of heat prevents the thermal load on the buildingstructure from causing it to collapse.Solutions from D+H:All protective measures can be implemented with D+H drives. A wide variety of protective measures can be achieved even with the standard version. Additional options can be fitted to cover an even greater range of protective measures. These options are available for many D+H drives.Slower sash movement: The running speed over the last 100 mm in the CLOSED direction is limited to 5 mm/s in all D+H drives. This running speed is set at the factory. The D+H software SCS has settings for reducing this speed over the entire rangeof travel. This option can also be supplied as a factory setting by requesting option -LS. Closing force 80 N to 150 N: The closing force of most D+H drives (apart from ZA, DXD and CDP drives) is limited at the factory to 150 N over the last 100 mm of travel. The running speed at this distance is also reduced to 5 mm/s. These parameters can be adjusted in the D+H software SCS.Safety provided by safety equipment (option -SKS):Touch-activated or contactless active safety devices can also be attached directly to the drives or drive groups on all D+H drives that use BSY+ technology. Alternatively, a closing edge protection module can be installed in front of the drive to which the safety device is connected.Stops the movement and generates an audible warning signal (option AS3):The drive is a fitted with a 2.3kHz signal emitter. An audible signal sounds for 4s before the window starts closing. The closing process starts after this. When the window is 25mm away from its closed position, the drive stops for 11s. At the start of this 11s stopping time, an audible signal is emitted. This signal continues to sound until the window reaches its end position. The closing speed is reduced to 5mm/s over this final 25mm before the end position. The volume of the signal, and other parameters, can be adjusted in the D+H software SCS.Dead-mans control: At the factory, all D+H control panels are set to be key-operated. In other words, the drives only run when the ventilation button is being pressed.Dead-mans control with authorised operation: All D+H drives can also be operated by key vent buttons, which also prevents them from being opened by unauthorised persons.