The environment of your home should be warm and cosy. It has been studied that the average house dissipates near about 10% of its total heat through walls, windows and doors. Energy efficient or Low E glasses do not allow this heat to escape from your house. Thus energy efficient glasses reduce your heating bills. Another advantage is that these Low E glasses do not require high maintenance. Energy efficient windows keep the amount of energy expended under control. The system of double glazing is more potent than single glazing. These types of glasses are readily available on the market at an affordable rate. In case of double glazed glasses, two glass sheets are placed at a distance of 16mm. The space between these two glass sheets acts as an insulator and thus prevents cold from outside entering the room.