FREE SMOKE device is made up of a frame and a UNI6060 natural alloy extruded aluminium counter frame, caulk assembled, complete with three –wing aluminium hinges and stainless steel screws and rivets. The device is opened with a three section pneumatic telescopic cylinder which operates with a mix of CO2 / OIL pivoted between two parallel brackets, a cylinder containing CO2 gas, a thermo fusible glass tube and a thermal valve. A further spring latch cylinder blocks the system in closed state when there is no emergency. The above mentioned latch cylinder can be undone to open the door for periodic maintenance. The system also allows to keep the opening position even in head winds of 10 m/sec. All the cylinder feed pipes provided are in Teflon protected by double stainless steel. The opening with controlled thrust up to full opening is also guaranteed in the presence of head winds. The device can be connected to a pneumatic type remote opening system without the need for other accessories.