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A wastewater heat recovery system for individual showers

September 2021
Gallery Gecko 1
Gallery Gecko 1


Currently, a lot of energy is wasted in the form of hot water. In fact, each shower only uses 15% of the calories contained in the hot water. When the water is ejected to the sewers, its average temperature is about 33°C for a standard shower at 38°C. This energy could be used to preheat the fresh clear water and reduce the energy needed. Moreover, the time waiting for hot water after the tap opening waste a lot of water. At each shower, 9 litres are lost during this phase. Gecko reuse 88% of the calories contains in the wastewater and provide hot water 3 seconds after the tap opening. By reducing the energy needed to warm the fresh clear water and reducing the waiting time for hot water, Gecko has a positive global impact.

Label Date September 8, 2021
From France
Maturity stage Initial market commercialization
Looking For Network, New clients, Visibility, Funding, Partners, Credibility

Implementation Stories

Implemented by L'Oréal in Paris (France) in 2022

L’Oréal innovation division chose Gecko to equip their professional training academy in Paris and their youth training school, Real Campus. After noticing the high consumption of hot water in hair salons, they decided to implement eight Gecko systems in February 2022. With an efficiency of more than 86%, the energy consumption of the L’Oréal salons has drastically decreased. The L’Oréal Real Campus heat recovery balance sheet shows an investment payback period of 18 months.


The project has saved 7,261.8 kwh per year, the equivalent of 36,672 km driven by electric cars


The environmental benefits

  • Due to specific thermal exchanger design Gecko has 88 % of thermal efficiency
  • Hot water available 3 seconds after the tap opening
  • 75% reduction of electrical consumption in every shower
  • 9L of hot water saved at each beginning of a shower

The Financial benefits

  • Less than 4 years payback time
  • 1 m² saved in each bathrooms compared to standard water boiler

Activity Region

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  • Headquarters
  • Activity

Company Profile


Reduce your environmental impact by using sustainable technology to save energy, water and money

View company profile Solution website
Headquarters 13290 Aix-en-Provence, France

Networking Partner

Cleantech Group

The Cleantech Group is a company that supports the development and marketability of clean technologies. The Cleantech Group provides members of its Cleantech network access to capital, investors, research and promotional opportunities. The group also provides advisory services for large corporations and governments. Founded in 2002, the Cleantech Group owns the term "cleantech" as a registered trademark.

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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. The innovator QUANTIA SAS has asserted ownership of the intellectual property rights for images, videos, and content showcased above, affirming full and unrestricted usage rights, and has provided explicit permission for the Solar Impulse Foundation to publish such information designated as "public" in the application form.