We reinvent the heat pump for your thermal comfort to be ecological, economical and easy to use.

Thanks to the energy of the sound: the new renewable energy of the 21st century.


Our EQUIUM Acoustic Heat Pump (AHP) uses the thermo-acoustic effect which corresponds to the propensity of a sound wave to exchange heat with a solid. In our machines, this sound wave of very high power will allow us to pump heat very efficiently and to raise its temperature for your greater thermal and ecological comfort...


Acoustic waves do the work of compression/expansion to produce cold or heat without greenhouse gases (use of a neutral gas) with a very low carbon footprint. The EQUIUM acoustic heat pump is also designed with 100% recyclable materials.


Thanks to its innovative and original design, the EQUIUM acoustic heat pump has a longevity of more than 30 years. It does not require any maintenance and has a very high efficiency. Indeed our technology allows a power modulation unlike traditional high temperature heat pumps that must work on/off when the outside temperature is above 5 ° C.

Our mission

Bringing you ecological and economical thermal comfort thanks to an efficient, durable technology that is simple to install and use.

Develop a French industry

Our ambition is to develop a French acoustic HP industry by bringing together university, industrial and commercial players from the Pays de Loire and Brittany region. Our objective is to participate in the reindustrialization of France, in the development of local jobs with high added value, and a strong economic, social and ecological impact. All this to meet the IPCC objectives of reducing CO2 emissions in Europe by 55% by 2030.

Democratize the acoustic energy

Developed on a large scale, thermoacoustics offers sustainable solutions to current climate issues and can be applied to many other uses than heat pumps (air conditioning for example). Our mission is to unleash the power of this natural energy by disseminating it to the widest possible audience in order to set in motion an essential technological breakthrough that will become one of the solutions to the current climate problem.

"You knew solar energy, hydraulic energy, wind energy, now you will have to rely on the energy of sound."


Principle of thermoacoustics: a complex natural phenomenon, at the crossroads of 3 disciplines: thermics, acoustics and fluid mechanics.

Acoustic waves are generated and amplified automatically in our machines by temperature gradient or by electricity. They do a compression-expansion work in the manner of a piston in a thermal engine or in a compression machine used to produce heat or cold, which makes it possible to carry out ultra-efficient heat pumping, without moving parts and without greenhouse gas refrigerant.


Compression produces heat


Expansion produces cold

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Our goals

Decarbonize heating systems in the residential sector, which issues are as follows in France:


In France, half of the CO2 emissions are generated by central heating and domestic hot water, in the entire building sector.


Old housing in France consume on average 4 to 6 times more than new constructions which consume 50kwhep/m²/year according to the RE2020.

Reinventing the traditional high temperature heat pump by exceeding its limits :

If the heat pump is the solution for heating by dividing energy consumption by 4 while reducing CO2 emissions by 80%, and if the heat pump will replace gas and oil boilers with low energy efficiency (4 to 5 times lower), its development may be hindered by its physical limits:

A high cost of use of the traditional heat pump

Problems, for the traditional two-stage hugh temperature HP : high maintenance costs, cycling problem which deteriorates the theoretical coefficient of performane (COP), limited lifetime and high CAPEX.

A complex installation of traditional CAP

The use of greenhouse gas refrigerants requires specialized installers, that implies margin stacking which locks access to a large majority, and has a strong impact on the consumer selling price.

The solution

Equium develops the heart of the acoustic HP to allow the actors of the HP market to solve all the problems related to their use and to propose an ecological and economical offer, easy to install.

The most ecological solution

Greenhouse gas free because working without refrigerant.

Reduction of CO2 emissions by 80%

compared to traditional gas boiler

No refrigerant fluid

Performante et économique

Lower TCO (Total Cost of Ownership) than any other offer on the market (traditional boilers and high temperature heat pumps).

A SCOP (Seasonal Coefficient of Performance) higher than traditional High Temperature heat pumps.

Lifetime : 30 years

Accessible and easy to use

Easy to install without the need for a professional.

Maintenance-free thermoacoustic core.

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Our supports

Our partners, who have recognized the interests of sound energy, and who support us

EQUIUM strategy Is to put in place a full industrial ecosystem to launch the first and only ecological French Heat Pump.

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Our team

The members of the management team have more than 25 years of experience in their field of application.

EQUIUM is a unique entrepreneurial adventure that is developing every day thanks to a complementary team with a strong experience in innovation processes, design, development of breakthrough technological products, acceleration and industrialization of technological innovation and HVAC industry.
The scientific aspects are supported by the CES from Mines Paris Tech and the LIED PIERI, major university partners in heat transfer and thermoacoustics. Two councils (strategic and scientific) support the company, notably with extensive experience in the field of heat pumps, energy and high-tech industry.

Cédric François

Cédric François


Entrepreneur for more than 20 years, expert in innovation through design, Cédric founded EQUIUM in 2017 to develop an impactful and "scalable" solution in response to the major challenges of the energy and climate transition facing humanity.

Olivier Saquet

Olivier Saquet


Olivier Saquet, engineer and PHD has a long and successful experience in the industrialization of technological startups: Build, improve and pilot the operational (manufacturing, purchasing, deliveries, ...) his motorcycle is to build, improve and manage the operational aspects ( manufacturing, purchases, deliveries, ...) and organizational (flow of information, materials, processes, digitization, ...) of the company to grow while remaining focused on customer satisfaction. He joined EQUIUM in mid 2020.

Thierry Le Pollès

Thierry Le Pollès


Thierry Le Pollès is a PHD engineer in applied acoustics. He is an expert in thermoacoustics and active infrared thermography. After having worked at Hekyom in thermoacoustics for 10 years at the genesis of the project, then at CEA Saclay in non-destructive testing by ultrasound and at Safran in non-destructive testing by infrared thermography, he joined EQUIUM in early 2020 as CSO.

Philippe Bonnet

Philippe Bonnet


Philippe Bonnet specializes in the automation of recharging machines in the nuclear field. In 2008, he created a company that manufactures pumping systems for which Cryoconcept became the main customer before participating in the LBO of the latter to become its CEO. In early 2019, he left Cryoconcept and joined EQUIUM as CTO.


This ambition is in line with your own? Industrial, investors, candidates, join the adventure.



11 rue de la rabotière,
44800 - Saint Herblain

Your contact

Cédric François
+33 6 01 02 03 04