New design delivers greater domestic hot water capacity within the same footprint and expands double wall availability across the complete ST Series product line.
Towaco, NJ – (July 14, 2026): Diversified Heat Transfer, Inc. (DHT) announced the expansion of its ST Series Semi-Instantaneous Water Heater line with the introduction of a High Output Double Wall heat exchanger option. The new design is available across all ST Series models, including 6-inch, 8-inch, 10-inch, and 12-inch shell sizes, providing engineers and contractors with more flexibility when designing high-demand domestic hot water systems.
The ST Series is now available with both Standard Output and High Output Double Wall heat exchanger options, allowing customers to select the performance level that best fits their application while meeting project specifications requiring double wall construction.
“Every project presents a different set of design challenges, from limited mechanical room space to increasing hot water demand,” said Chris Bove, National Sales Manager, Diversified Heat Transfer. “Our goal is to give engineers and contractors more flexibility to meet those challenges with solutions that improve system performance, simplify specifications, and provide long-term value for building owners.”
The expanded ST Series is designed for a broad range of commercial and institutional applications, including healthcare, education, hospitality, multifamily housing, government, commercial buildings, and industrial facilities. With two double wall performance options now available across the entire product line, engineers can more easily specify the right solution without compromising performance or installation requirements.
In addition to its expanded double wall offering, the ST Series features a compact footprint, stainless steel shell construction, advanced electronic PID controls with touchscreen interface, native BACnet IP and Modbus IP communication, and vertical or horizontal configurations to accommodate a variety of installation requirements.
Key Customer Benefits:
- Higher domestic hot water capacity within the same equipment footprint
- Greater flexibility to meet project specifications and application requirements
- Two double wall performance options available across the entire ST Series product line
- Faster recovery for demanding commercial and institutional hot water applications
- Compact design ideal for space-constrained mechanical rooms
- Advanced controls with Building Management System integration
- Available in 6-inch, 8-inch, 10-inch, and 12-inch shell sizes
- Engineered and manufactured in the USA
For more information about the DHT ST Series Semi-Instantaneous Water Heater line, visit https://www.dhtnet.com or contact your local Diversified Heat Transfer representative.
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DHT ST Series Water Heater Image
About Diversified Heat Transfer
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 90 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, DHT acquired Sussman Electric Boilers, the industry leader in electric steam and hot water boilers, with a century-long legacy.