Steam to Hot Water Systems

envirosep HTS
The envirosep HTS, Standard Heat Transfer System is a UL-Listed, factory manufactured and tested system used in conventional building hydronic heating systems which utilizes steam as the heating source. Heating hot water is supplied at a standard 180°F and is recirculated through the building system by use of centrifugal pumps which are sized to meet specific building requirements. The envirosep HTS provides air-free, hot water at a controlled flow rate, while automatically refilling under normal system losses. Also, the envirosep HTS allows for system thermal expansion/compression based on the building system volume. A UL-Listed, industrial control panel with single-point power connection is pre-wired to all electrical field devices and power sources. The envirosep HTS speeds installation and start-up of building hydronic heating systems which provides significant savings to contractors, engineers, and building owners.

The envirosep HTS-ITC, Heat Transfer System with Integrated Temperature Control is a UL-Listed, ready-to-install system used in conventional building hydronic heating systems which utilizes steam as the heating source. This system is fully equipped with all of the standard features of the envirosep HTS, with the addition of steam control valves and pressure reducing Valves, if required. Providing accurate, local control heating hot water temperature, the envirosep HTS-ITC utilizes pilot-operated or pneumatically-actuated microprocessor based control assemblies. Optional remote temperature control for BAS integration is available for any protocol. The envirosep HTS-ITC is manufactured per ASME Section IX Codes and Standards, and full operational tests are conducted prior to shipment resulting in problem-free system start-ups for mechanical contractors and building owners. An ASME PP-stamp may be added for industrial applications.


  • ASME, shell & tube heat exchanger – U-tube, with U-stamp
  • Base-mounted, end-suction pumps
  • Vortex air separator, with auto air vent
  • Bladder expansion/compression tank
  • Triple duty valves & suction diffusers
  • UL Listed NEMA 12 industrial control panel
  • Float & thermostatic steam trap
  • Supply/return thermometers
  • Safety relief valve
  • Make-up water assembly
  • Pump differential pressure gauges
  • Microprocessor based temperature controller (envirosep HTS-ITC)
  • ASME Section IX Welding


  • PLC system controller w/ touch screen
  • NEMA 7/9 explosion-proof rating
  • Flexible pump connectors
  • Seismic or vibration isolators
  • Plate & frame heat exchangers
  • Vertical inline centrifugal pumps
  • Combination air & dirt separator
  • Specific performance criteria (upon request)
packaged pumping systems
industrial control panels

Contact us to learn more about Envirosep solutions.

We offer integrated solutions for your fluid handling, heat transfer and energy recovery needs.