Diversified Heat Transfer (DHT) is a leading engineering and manufacturing company of heat exchange equipment for residential, commercial, and industrial markets. With over 85 years of experience, DHT can design, build, and manufacture innovative, technology-driven products that provide flexible, high-quality, and cost-effective solutions for a wide variety of applications. In 2022 Sussman Electric Boilers became a brand of DHT, bringing with it a century-long legacy of specialized electric steam and hot water experience.