A number of factors influence the energy efficiency of windows, including the kind of glass used, number of panes, position, size, type of frame, ability to reflect sunlight and shading. During the summer, interior shades or draperies should be closed to prevent the home from overheating. During the day, exterior shades should be used to prevent direct sunlight from entering. On summer nights, interior shades can be left open to provide some degree of radiation cooling as the house reradiates energy to the cooler night air. Buying New Windows New windows are long-term investments that have a large impact on your home's energy systems.
Today there are many new window technologies available that are worth considering.
Each type of glazing material and frame has advantages and disadvantages.