The casement aluminium swings through one or more hinges on the side, and can be easily opened or closed with the handle, which can save energy when closed and achieve ventilation when opened.Aluminium casementare often used where maximum ventilation is required, such as kitchens or bathrooms. They can also be found above obstructions like the kitchen sink to make opening and closing easier. Crank windows are also often used in living rooms and sunrooms, and can be combined with specially shaped windows for a dramatic look inside and out.