About us

Building Efficiency

RegenEAU democratizes access to energy efficiency and decarbonization solutions for the multi-dwelling and commercial building sector. By bringing together the best of existing technologies and new practices, we offer high-performance systems that pay for themselves quickly.

At the forefront
of the circular economy

Hot water production is usually the largest energy consumption item in multi-housing. And it offers your greatest potential for energy savings.

Our systems are based on three principles that align your environmental and financial responsibilities.

Recover and reuse waste energy from wastewater heat to preheat incoming water

Reduce the energy consumption required to supply the entire building with new hot water, and thus your environmental footprint

Quickly make the replacement of the hot water system profitable and permanently reduce your operating costs


David Pineault,


With a bachelor's degree in engineering physics and a passion for energy efficiency, he is full of innovative ideas for everything related to buildings. After a few attempts in product development, he returned to school to pursue a master's degree in mechanical engineering. His course of study brought him various distinctions that made him realize the realism of his ambitions. He then decided to interrupt his master's degree and create his own company to give life to his first impact solution: RegenEAU.


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Learn more


Learn more