A door system for an escape route, comprising a set of door jambs, which form a vertically extending, rectangular frame, and a door which is mounted in said frame, wherein the door is movable between a closed position, in which the passage through the frame is blocked, and an open position, in which the passage through the frame is open, and wherein the door system further comprises a door locking system by means of which the door can be locked in the closed position thereof, wherein the door can move in vertical direction in the frame between the closed position and the open position, and wherein the door system is so designed that the door is moved from the closed position to the open position by the force of gravity upon being unlocked.
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