Electric Hot Water Boilers

  • HSI-electric-boiler_small1Vertical pressure vessel
  • Compact footprint
  • Lower circuit loading allows for overvoltage conditions
  • Individually replaceable elements
  • High pressure


Hot Water from: 30 kW to 4320 kW
(102 to 14,688 MBH)
Pressure from: 30 – 415 PSIG
Voltages from: 208 – 600 Volts

Theory of Operation

Vapor Power electric hot water boilers are designed to provide fast, efficient, and economical hot water for heating and process through the use of electric resistance elements. The boiler controls automatically energize/de-energize steps of elements to maintain the desired water temperature. All boilers utilize ASME pressure vessels and all electrical components are UL listed and are wired in accordance with the current National Electrical Code requirements.

Each boiler is insulated with 3-1/2″ fiberglass secured to the vessel, and is housed in a heavy-gauge sheet metal cabinet mounted on a full size structural steel base. All Vapor Power resistance style boilers utilize 70 to 75 wpsi Incoloy-sheathed elements configured in conservatively sized circuits to allow for overvoltage conditions as great as 10% without adversely affecting the integrity of circuit components.


With over 100 years of experience in the industry and thousands of operating units, Vapor Power stands ready to assist with any specific application. Common applications include:


HWR1638-30 to HWR1638-144


HWR1654-150 to HWR1654-216


HWR2438-210 to HWR2438-480


HWR2450-510 to HWR2450-720


HWR2462-750 to HWR2462-960


HWR3656-936 to HWR3656-1152


HWR3668-1224 to HWR3668-1728


HWR3680-1800 to HWR3680-2304


HWR4274-2520 to HWR4274-3456