A clean cooling solution makes history

To make a difference, you have to move: This was the motto of the founders and inventors of Efficient Energy when it came to developing the new eChiller chilled water unit. With one goal clearly in mind: the development of an environmentally friendly refrigeration unit using water as a refrigerant.

Step by step towards a future with exclusively climate-neutral chillers

Founded in 2006, it took eight years before the eChiller could be presented at CHILLVENTA 2014. In 2018, the eChiller went into series production and in 2020, the product range was already expanded with the next generation, the eChiller120. In 2021-2022, the next generation of Bluezero technology with InterCooler concept was invented as product platform for the product series up as of 2023.


Development of next generation Bluezero technology with InterCooler concept


Bluezero®inside: Successful implementation of the first OEM project with Menerga


Development and product launch eChiller120


Series launch of eChiller35/45 and presentation at Chillventa 2018


One year of successful field test experience, presentation of the pre-series product eChiller35 at Chillventa


Prototype eChiller 35 kW


Presentation of the first eChiller chiller at Chillventa. Start of field tests in the data centre sector


Santo Venture Capital becomes investor


Move from Sauerlach to Feldkirchen


First prototypes and construction of a laboratory unit, 15 kW cooling capacity


MIG AG becomes investor


First financing round with private investors


Foundation of the company with headquarters in Sauerlach and start of R&D activities in the field of water as a refrigerant

Find out more about Efficient Energy

Past and present: Find out more about our company and our sustainable refrigeration technology, which has already received several awards. Or become part of the Efficient Energy family and work with us in one of the most exciting fields of the future.

The eChiller

Get to know the eChiller, the chiller with the safe and natural refrigerant water.

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Careers and jobs

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

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