Then pressure on the spring is relieved and retracts the cord, which is attached to the window frame: the window closes! Depending on how quickly the air streams in, the window closes after 5 minutes or up to 5 hours after opening (according to details from WIN PRODUCTS). ###>Selon la vitesse de pénétration de l'air, la fenêtre se referme après un délai allant de cinq minutes à cinq heures (d'après les données de WIN PRODUCTS).