Thermal Windows, Inc. is in its fourth decade of quality window design and production. We manufacture energy-efficient aluminum and vinyl windows, sliding glass doors and terrace doors. Many of our products meet Energy Star performance levels.Thermal Windows, Inc. and began designing and manufacturing energy efficient windows.Today, we are an industry leader known for value, integrity and performance. Our corporate headquarters, showroom and 235,000 sq.ft. manufacturing plant are located in Tulsa, Oklahoma. Our 200 employees 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, annual sales exceed $35 million.Our commercial products utilize thermally broken aluminum, with many of them containing advanced polyamide thermal breaks. High-performance glazing is available, including options to enhance security, maximize STC/OITC ratings, optimize u-factors and minimize solar heat gain.Our research, design and testing facility provides continuous quality assurance. All testing is done by certified AAMA technicians. (AAMA: American Architectural Manufacturers Association). Our in-house powder coating line provides high-performance AAMA 2604 and 2605 finishes in hundreds of colors. Anodized and liquid painted finishes are also available.Thermal Windows, Inc. is a registered Continuing Education Provider with the AIA (American Institute of Architects).Thermal Windows, Inc. - An American company dedicated to providing the highest quality products and service.