Replacing the windows in your house can improve the quality and value of your home. You may be unaware of the vast amount of choices you have. Finding the windows that are right for you could be a time consuming task. However, the time you will spend deciding will be well worth it. If you choose the right type of windows you get you will lower your electric and gas bills by decreasing your energy usage. Before we get into the juicy details you need to be educated a little on what low-e glass is.