We recently had Illinois Energy replace a large bay window in our living room, the windows in our daughter?s room and our front door. We have immediately felt and seen the benefits. Sitting in front of our bay window during the winter months was like an endurance competition because you could actually feel a cold draft coming over your shoulders. We tried loading the sitting area with blankets to block the encroaching elements, but all that did was give us cold blankets with which to cover our freezing selves. The new window was installed on a 25-degree day, and the change was incredible. Not only is the area warmer but it is also quieter because we no longer hear the breezes that used to squeeze through the old windows. But the most noticeable difference has been with our new front door system. Our new door is rich in color, has a much more stately design, and fits tightly in the space to help regulate the inside temperature. We live on a street with many beautiful houses, but we now feel that our new door helps our house stand out. Installation was quick, courteous, and professional, and we will have no problem recommending Illinois Energy to our friends and neighbors.