Model IWH Electric Boiler/Hot Water Heater — Hot Water Only

CB Electric Boiler Model IWH

CB Electric Boiler IWH

CB Electric-IWH BoilerThe Cleaver-Brooks Electric Boiler Model IWH is an instantaneous water heater.

  • Electric hot water heater
  • 15 to 360 kW
  • Electrical power
  • 160 psig
  • No localized emissions
  • Compact design and smaller footprint
  • 100% emissions-free
  • Quiet operation with virtually no noise emissions
  • Nearly 100% efficiency at all operating points

Update June 13, 2018

The IWH instantaneous water heater will be phased out of production beginning October 1, 2018. Beginning July 1, 2018, the IWH will become a legacy product. You will still be able to special quote the IWH on a case-by-case if required.

Due to the overlap with the WB hot water boiler, the IWH will no longer be available for new product sales. All legacy boilers can be special quoted for unique situations though pricing and lead-time will be impacted.

The IWH was originally designed to have an inner epoxy lining, making it ideal for applications requiring potable water. Cleaver-Brooks no longer intends to line pressure vessels. Without this feature, the IWH is a redundant product.

Model WB will continue to be promoted and offered to support applications fired boilers cannot satisfy. Electric boilers excel in meeting applications requiring a small footprint, quiet operation, and inability to access traditional fuels.

Product Overview

The Model IWH instantaneous water heater electric boiler is designed to operate in hot water heating systems with a minimum footprint. It delivers maximum kilowatts and provides instantaneous water heating without a storage tank. A typical Cleaver-Brooks Model IWH hot water boiler system includes operating controls, elements, fuses, contactors, relief valve, drain valve, etc. Vessel sizes range from 6″ to 10″ diameter with an output spanning 15 kW to 360 kW.


  • Ease of maintenance with reduced complexity/number of moving parts
  • All units are wired, tested, and ready for installation


  • Lower Fuel Cost
  • Lower Emissions


  • Process Steam
  • Building Heat
  • Power and Utilities
  • Refineries and Petrochemical
  • Laundry and Dry Cleaning