Windows and doors are very important considerations in any design. With proper selection and specification they can enhance not only the look of a home or building, but their performance as well. Before you specify a window or door, you should consider the em bo died energy, lifecycle and material benefits of any product. This program will look beyond performance of windows and compare t he or igin of common frame materials, their carbon footprints, lifecycles and durability. It will look at each component individua