Tulsa Heaters, Inc. (THI) is a private Engineering firm located in Tulsa, OK, celebrating 35 years of service to the global oil & gas industry. THI has built a reputation as one of the world's leading designers and manufacturers of fired heaters, waste heat recovery units (WHRU's), and complementary systems. THI has also retrofitted and improved upon virtually every brand of fired heater system manufactured in the U.S.A. To date, THI, has manufactured over 950 new heater products and executed over 1300 major product retrofits. Many of these projects involved highly innovative engineering designs and/or new concepts to achieve the clients' specialized needs. THI's primary goal is to maintain our solid and satisfied client base by offering the highest level of customer service, quality of design and fabrication, and efficient project management.