Skip to Main Content

Diversified Heat Transfer Inc.

ST Series: Semi-Instantaneous (Steam-to-Water) Water Heaters

The DHT ST Series of semi-instantaneous water heaters are the engineered solutions for engineers and facility owners/managers who need high recovery capacity in a small space.


They are constructed of stainless steel pipe and other non-ferrous materials to insure long leak-free operation. Designed for continuous high-peak loads, the ST Water Heaters are ideal for high-demand applications, such as hospitals and dormitories.

Units are custom-engineered using steam, boiler water or HTHW as the heating medium. The semi-instantaneous operation provides high output by channeling the incoming cold water directly over the heat exchanger tubes in a controlled manner to maximize the heat transfer rates compared to conventional stratified heat exchanger convection systems. The velocity of water and pressure drops are controlled by changing water flow directly across the heat exchanger, which increases heat transfer and inhibits scale formation.

Perfect for mechanical rooms where space is limited, the water heating systems feature vertical configurations so they require less than four square feet of floor space. Plus, the tube bundle can be removed straight out or down from the bottom of the unit to eliminate the need for overhead space or extra clearances for service or maintenance. Horizontal configurations with rack-mounted stands are also available.

About Diversified Heat Transfer Inc.

Diversified Heat Transfer (DHT) is a leading engineering and manufacturing company of heat exchange equipment and systems for the residential, commercial, and industrial markets. With more than 80 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.

  • Semi-instantaneous Water Heaters
  • Indirect Water Heaters
  • Tank and Plate Storage Water Heaters
  • Unfired Steam Generators
  • Shell and Tube Heat Exchangers
  • Plate and Frame Heat Exchangers
  • HVAC Coils
  • Replacement Tube Bundles
  • Custom Skid Packaged Systems
More Products from Diversified Heat Transfer Inc.

Request a Quote or More Information on ST Series: Semi-Instantaneous (Steam-to-Water) Water Heaters

Select your Region