We had a Four Seasons Sunroom manufactured by Four Seasons Sunrooms of Hauppauge, New York. The whole concept is poor. The room becomes very hot when the sun is out and is uncomfortable to sit in. Without the sun, the room immediately changes to the ambient outside temperature, which during late fall, winter and early spring is too cold to enjoy the room. Because of the low thermal value of the windows it becomes very expensive to cool/heat the room. Beyond that, the seal in the windows failed after a few years and accumulated condensation and growth. Four Seasons refused to make good on the windows. We eventually removed the sun room and built a traditional room in its' place which we now enjoy. At least the foundation was reusable.