The aluminum alloy louver slats are tilted using a manual knob or push-rod motor that moves the internal connecting rod. The slats have a tilt angle of 0-105 degrees, which can be adjusted freely. Maximum ventilation is achieved when the slat angle is 90 degrees. An angle of 15-25 degrees effectively prevents outside views. When the slats are fully closed, they block heavy rain. If an electric system is selected, it can be linked to the fire control center as an automatic smoke exhaust and heat dissipation damper.
