Oklahoma Owned and Operated In 1955, Bob G. Pool and his father Cal began selling awnings, storm windows and storm doors out of a Tulsa storefront as Aluminum Window Products. Attuned to the market, Bob saw the growing need for high quality replacement windows with insulated glass. In 1979, he founded Thermal Windows, Inc. and began designing and manufacturing energy efficient windows. Today, we are an industry leader known for value, integrity and performance. Our quality products and personalized service lead to an exceptional level of customer satisfaction. Our corporate headquarters, showroom and 235,000 sq.ft. manufacturing plant are located in Tulsa, Oklahoma. We have 200 employees and custom-manufacture over 70,000 windows and doors every year. With a branch office in Oklahoma City and a network of dealers across the United States, our annual sales exceed $35 million.