The Louvre Window Opener can be used to automatically open our greenhouse & many other popular models; & with a temperature range between 15ºC (59ºF) & 25ºC (77ºF) you can be sure the opener will open & close your louvre window when appropriate. Relatively simple to fit the Louvre Window Opener is supplied with fully illustrated mounting instructions & information on setting the piston filled with mineral wax which opens the window. Other Louvre Window Opener features include a manual override function & one year guarantee.