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Diversified Heat Transfer Inc.

SP Series: Indirect Water Heater

The packaged systems utilize simple, real-time load tracking and responsive controls to maintain accurate hot water temperature under various load patterns.


The DHT SP Series advanced plate-type boiler water fired water heater incorporates the company’s field-proven PID controller with high-efficiency plate and frame or brazed plate heat exchangers to satisfy potable water heating needs in commercial and institutional environments. The packaged systems utilize simple, real-time load tracking and responsive controls to maintain accurate hot water temperature under various load patterns.

SP Series indirect water heater can efficiently produce up to 150 GPM of 140° F domestic hot water. Units can be coupled with all major medium-, normal-, and low-temperature condensing boiler water to achieve high efficiency in an optimal space. The control system features a durable RTD temperature sensor transmitting a 4-20 MA signal through quality twisted shielded wiring. The signal transmits directly into the PID controller, which in turn sends a signal to the electrically activated two- or three-way control valve to achieve accurate temperature control over various demand situations.

Maintenance is easy with the SP water heater. Flanged vitualic or union connections allow for the complete removal of the heat exchangers without disturbing the water heating piping. Isolation valves, inlet strainer and backflush connections are provided for scheduled maintenance.

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
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