Gallery Blue  1
Gallery Blue  1
April 2021
Headquarters 3029 CR Rotterdam, Netherlands

Blue - Heat recovery shower system from wastewater to preheat the cold water supply

The Blue uses heat from wastewater to preheat the cold water supply, resulting in a significant lower demand for hot water. By doing so, the demand for hot water drops significantly which means a significant lower energy consumption (depending on the version, a 4-person household can save up to 1.876 kWh per year). In turn, this allows for a smaller hot water system. The installation costs of the hot water system and the utility bill will be lower. The energy performance of the building will improve considerably and less CO2 will be emitted. The Blue has been specifically developed for multi-story construction and projects where the highest possible efficiency must be achieved on one floor.

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Key features

  • Save up to 65% on your energy usage for showering
  • Simplify your hot water system
  • Reduce your CO2 emission for showering by up to 50%


  • Save up to €5,000 on your technical installations
  • Long-term financial savings

Categories of Application

Maturity Stage

  • Medium and large scale commercialization
  • Small scale commercialization
  • Initial market commercialization
  • Prototype testing in the real world
  • Prototype testing 1:1 in the lab

Looking For

Activity Region

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The information set out above, is solely for the purposes of information and the Solar Impulse Foundation does not provide any guarantee as to its authenticity, completeness or accuracy. This information does not constitute investment advice or a recommendation to buy into, transact or to enter into any agreement with any of the parties or persons mentioned above. Potential investors or interested parties are solely responsible for their investment or business decisions and for performing any due diligence required by the circumstances.