Home automation installation comprising a concealment device, a window and a motor drive device, - the concealment device comprising: o a box, o a screen, o a winding tube, the screen being windable on the winding tube, the winding tube being arranged inside the box, - the window comprising: o at least one opening frame, o a fixed frame, - the motor drive device being configured to wind and unwind the screen between a high end of travel position and a low end of travel position, as well as to move the opening frame to tilt it relative to the fixed frame, the motor drive device comprising: o an electromechanical actuator, the electromechanical actuator including an electric motor, o a flexible element, the flexible element cooperating with the opening frame of the window, in which installation, when closing the opening frame relative to the fixed frame by means of the motor drive device from a tilted open position of the opening frame relative to the fixed frame, the flexible element is driven by the winding tube of the screen of the concealment device, which is itself rotated by the electromechanical actuator, characterized in that the motor drive comprises: - a pulley integral with the winding tube of the screen of the concealment device, around which the flexible element is configured to wind and unwind, - a tension system of the flexible element, the tension system of the flexible element comprising: o a plurality of guide elements (41, 42), at least one of the guide elements being fixed relative to the box of the concealment device and at least one other of the guide elements being movable relative to the box of the concealment device, o an elastic element, a first end of the element being connected to the movable guide element and a second end of the elastic member being connected to the box of the concealment device so as to maintain the flexible element under tension. - the concealment device comprising: o a box, o a screen, o a winding tube, the screen being windable on the winding tube, the winding tube being arranged inside the box, o a box, o a screen, o a winding tube, the screen being windable on the winding tube, the winding tube being arranged inside the box, - the window comprising: o at least one opening frame, o a fixed frame, o at least one opening frame, o a fixed frame, - the motor drive device being configured to wind and unwind the screen between a high end of travel position and a low end of travel position, as well as to move the opening frame to tilt it relative to the fixed frame, the motor drive device comprising: o an electromechanical actuator, the electromechanical actuator including an electric motor, o a flexible element, the flexible element cooperating with the opening frame of the window, o an electromechanical actuator, the electromechanical actuator including an electric motor, o a flexible element, the flexible element cooperating with the opening frame of the window, - a pulley integral with the winding tube of the screen of the concealment device, around which the flexible element is configured to wind and unwind, - a tension system of the flexible element, the tension system of the flexible element comprising: o a plurality of guide elements (41, 42), at least one of the guide elements being fixed relative to the box of the concealment device and at least one other of the guide elements being movable relative to the box of the concealment device, o an elastic element, a first end of the element being connected to the movable guide element and a second end of the elastic member being connected to the box of the concealment device so as to maintain the flexible element under tension. o a plurality of guide elements (41, 42), at least one of the guide elements being fixed relative to the box of the concealment device and at least one other of the guide elements being movable relative to the box of the concealment device, o an elastic element, a first end of the element being connected to the movable guide element and a second end of the elastic member being connected to the box of the concealment device so as to maintain the flexible element under tension.