We are the pioneer for climate-neutral refrigeration solutions

With courage, passion and ingenuity, we have succeeded in replacing conventional refrigerants with pure water (R718). By virtue of its mode of operation, eChiller sets new standards in energy efficiency, with up to 80 % energy savings compared to the state of the art.

Success that motivates us and confirms that the seemingly impossible is indeed possible.

We have great expectations and do everything in our power to achieve them. Thanks to our world-class staff with excellent qualifications and know-how, efficient energy has today become a strong, competitive enterprise with a product in a league of its own: eChiller.

Our vision

Imagine only climate-neutral chillers and heat pumps will be used.

Our mission

To establish water as a refrigerant and to supply the respective chillers and heat pumps.


The use of chillers with the climate-neutral refrigerant water is sustainable and creates inestimable value for future generations. We have outstanding people who can optimally develop their individual strengths at our company and make the world a little bit better each day. Together, they form a magnificent team through intelligent interaction, giving our business the efficacy it needs to realise Clean Cooling for our customers. With our innovative prowess and prudent use of our resources, we strive for our joint success. EE employees appreciate the orientation towards our values and our actions based on these. The more you internalise these values, the greater your likelihood of success at our company. With this in mind, we would like to explain our values, the skills and specific conduct most important to us all in our day-to-day dealings with one another and our purposive actions.


  • We have a vision, always aligning our actions systematically with it and never allowing ourselves to be sidetracked by self-interest or group interests
  • We fight for our goals and strive jointly to win
  • We act in a cooperative spirit and never assign blame to others
  • We help and support each other at all times, according to our individual strengths
  • We give each other timely, open and concrete feedback
  • We have fun


  • We listen to each other attentively to understand our colleagues’ points of vie
  • We argue factually and precisely, presenting clearly and descriptively all of the facts
  • We share information that serves as the basis for our actions in a timely, clear, open and honest manner so as to develop a necessary level of understanding among all those involved
  • We accept misunderstandings, disagreements and conflicts and address them with mutual respect and appreciation
  • We always respond to objections and concerns seriously if these are associated with concrete proposals for solutions


  • We are dependable, keep our word and deliver on our promises, thereby nurturing credibility and trust
  • We act impartially and without bias in the company’s interest
  • We openly admit mistakes since they expose opportunities for self-improvement
  • We question actions that are inconsistent with our values
  • We are honest and direct with our colleagues


  • We set ourselves high goals, assess performance by results and go the extra mile to achieve this
  • We are ambitious and do not need an initial stimulus for us to take action
  • We are ardent about our tasks as we see the sense in them
  • We make decisions systematically, weigh up risks and benefits and take responsibility for the consequences

Pioneering spirit

  • We question traditional solutions and break novel and innovative ground with curiosity, creativity and courage
  • We develop purposive and efficient processes and product solutions that prove themselves in practice
  • We assign the highest priority to those ideas that distinguish us as pioneers in the refrigeration industry

Our Executive Board

As members of the executive board, Georg Dietrich, Thomas Bartmann and Dr.-Ing. Klaus Gebauer are responsible for implementing Efficient Energy’s corporate strategy.

Georg Dietrich, born 1977, has great international experience as a strategy, finance and operations lead. His focus has always been on building disruptive business models and the implementation of growth strategies. As Vice President Controlling at ProSiebenSat.1, Georg was tasked with the creation of new successful business models and their growth. Moreover, he successfully restructured a German Startup and developed it into a global medium-sized company group. As a consultant, he pushed the business of tech companies to the next level by guiding them through the rough waters of change.

Georg joined Efficient Energy in 2018. As CEO, he is responsible for the strategic development of the company. In addition, Georg is in charge of the departments Product Management, Finance, IT and Administration.

Thomas Bartmann, born 1958, studied mechanical engineering at the renowned RWTH University in Aachen, Germany. During the last 20 years he worked for various international companies within the refrigeration industry. In his positions, leading international sales and business development, he gained a broad experience working in Europe and abroad. He has a great technical expertise and is well known in the industry.

Thomas joined Efficient Energy in 2017 as Member of the Executive Board. He is responsible for Sales Marketing and Service.

Klaus Gebauer, born 1959, studied mechanical engineering at the Technische Universität Braunschweig and was awarded a doctorate in combustion engines and measuring technology. He has worked over the past 25 years for prominent international automotive suppliers and manufacturers, medium-sized technology groups and smaller CHP and plant manufacturers. He has managed R&D, engineering and operating divisions for mechanical, electronic and optical systems. Klaus Gebauer has both many years’ international management responsibility as well as extensive know-how in research into innovative materials and new production processes.

In his function as Head of Engineering he is in charge of the company’s predevelopment, development and production activities.

Investors and patrons

We sincerely thank our investors and patrons for their unwavering support and belief in our vision.

Our investors:

MIG Fonds
Santo Venture Capital GmbH
Private Investoren

Our patrons:

Deutsche Bundesstiftung Umwelt (DBU)
Bayerisches Staatsministerium für Wirtschaft, Infrastruktur, Verkehr und Technologien (StMWIVT)

From research project to future producing company

Find out more about the history of how Efficient Energy came about, our award-winning development, the eChiller and your opportunities to work in one of the most innovative companies in the refrigeration and air conditioning industry.


Get to know the most important milestones in our company history in a short overview.

Our history

Careers and jobs

Work with us on one of the most exciting projects of today: reducing greenhouse gases.

Go to career page


Efficient Energy and the eChiller have won multiple awards! Find out more about our awards and prizes.