There’s nothing wrong with windows that open to the outside, since this is a great way of saving space within the house. However, this way the shutters will need to be placed on the inside, which is significantly reduces the potential heat protection offered by installing the shutters.
Let’s think about. The sun heats up this relatively large one-layered glass surface, which heats the room up. Hence, there is no much point in having a shutter on the inside, since using it will block the light out, but not the heat. However, if the shutter is placed on the outside, it will block the heat of the sun from reaching the glass
surface providing a much better heat insulation to your home. In order to increase heat protection, we use double layered glass. The air gap between the two glass panels will increase insulation property of the window.
“Double glazing, double comfort”
Therefore, by adopting double glazing windows and doors throughout the house we can prevent the heat coming in and the cool air going out achieving a increased energy efficient solution, that means cost saving for you.