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Maddock Industries represents Diversified Heat Transfer, Inc. (DHT), a leading engineer and manufacturer 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. DHT’s comprehensive range of products includes specialty solutions that bridge the gaps that currently exist in the hydronics sector. DHT products – including large storage water heaters and high-capacity tanks – address the growing demand for larger and more efficient water heating solutions.

In 2022, DHT acquired Sussman Electric Boilers, the industry leader in electric steam and hot water boilers. The acquisition highlights DHT’s commitment to innovation and championing energy efficiency and cutting-edge technology.

To determine whether a DHT product is right for your application, talk to a Maddock Industries hydronics expert. Our seasoned team of professionals will leverage their extensive experience to advise on appropriate solutions and more.

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DHT manufactures a full line of hot water heaters and HVAC coils for all residential applications. The brand’s heat exchangers and storage tanks offer tremendous flexibility for any home installation.

Products include:

  • Water Heaters: TX Series and Techtanium indirect water heaters, Everhot external tankless water heaters
  • Heat Exchangers: Brazed plate heat exchanger, E-ZEE Flow™ heat exchanger
  • Stock HVAC Coils: Stock flange duct coils, stock series cased hydronic coils (AHCC), stock evaporator coils, stock chilled water coils
  • Central Tankless Coils


DHT manufactures a diverse range of flexible heating and cooling solutions for commercial applications including:

  • Water Heaters: ST Series semi-instantaneous water heaters, DHT touch screen water heater control system, SP Series instantaneous water heaters, STP Series tank and plate storage water heater
  • Steam Generator: SS Series unfired steam generators
  • Heat Exchangers: Shell and tube heat exchangers, plate and frame, brazed plate heat exchanger, replacement tube bundles
  • HVAC Coils: Water coils, standard steam coils, steam distributing coils, condenser coils, evaporator coils
  • Lindy Commercial Tankless Coils: Lindy tankless coils, Vigilante oil preheaters
  • Domestic Water Storage Tank


DHT manufactures heat transfer solutions for industrial applications and carries the full line of Sussman Electric Boilers.

Products include:

  • Sussman Electric Boilers: ES, MBA and SVS electric steam boilers, SSB stainless-steel electric steam boilers, SVW electric hot water boilers, CSG steam to clean steam exchangers
  • Plate & Frame
  • Shell & Tube Heat Exchangers

Get a Quote Today

Contact a Maddock Industries hydronics expert for information and pricing on DHT’s diverse product line.

Contact us to learn more about DHT