A leading heat exchanger manufacturer; As one of the leading UK heat exchanger suppliers, Sterling Thermal Technology is experienced and trusted. Acting as a technical partner to many of the world’s leading businesses, we design and manufacture heat exchangers to custom specifications – from first principles to lasting partnerships. We are a business with a proud pedigree. Previously known as HEI, Thermo Engineers, Britannia Heat Transfer, Thame Energy Services and Britannia Heatex, we have over 100 years’ continuous experience in the heat exchange industry. Throughout our history, we have been at the forefront of technology, developing new and pioneering solutions to meet the changing demands and challenges of the global industry.