Hydro Blocks HVAC OEM OEM Grundfos


The Grundfos CHB comes with a wide range of important functions and features built in into the house, which reduced project complexity and costs significantly. Depending on your requirements, the CHB can be combined with other a matching flow group unit, making an “Integrated Water Circuit”


  • Integrated 3-way valve
  • Pressure relieve valve
  • Air ventDrain tapInternal bypass
  • Optional connections for expansion vessel, external bypass and pressure gauge
  • PHE connection½” Brass DCW inlet¾” brass CH return¾” connection to primary heat exchanger
  • Domestic cold water parts


  • Compact design
  • Integrated solution. Several hydraulic functions integrated in one unit
  • Savings. Save costs in developing, tooling and production
  • Simple supply chain. Several part numbers combined in only one
  • IWC available. Combining the CHB with a matching flow group make up to 90% of hydraulic functions in a boiler
  • Scalability
  • Compatible with UPS and UPM3

Contact your Grundfos HVAC OEM sales representative if you want to learn more about the applications of the CHB.