TÜV certification of our quality management system by ISO 9001

Our quality management system was ISO 9001 certified by TÜV Thüringen in 2007 and has regularly been audited since then. In the course of this certification, a systematic measurement of our customers‘ satisfaction has been implemented as well. This measures their satisfaction with questionnaires referring to the German school grade system (1=very good, 2=good, 3=satisfying, 4=just enough to pass, 5=faulty, 6=not satisfying) and allows text comments. The areas measured are sales, project support and technical service with 6-9 questions each.

In all three areas of all measures since the very first survey, average grades between 1,5 and 2,5 were achieved. As one can see in our Customer Satisfaction summary 2006-2023 the total average grade was 2,37 in 2007, improved to values between 1,7 und 2,1 in the subsequent years and reached the exellent grade of 1,93 in the year 2023.

We thank all respondents for the feedback and often very helpful remarks and take them as an incentive to do our best to achieve customer satisfaction also in the future. If our customers wish to participate in the customer satisfaction survey, they can request a questionnaire by E-Mail to info|at|sokratherm.de with the header „QM questionnaire“.

The company

Powered by tradition

For over 45 years we find our drive in climate protection and continuously improve the energy efficiency and performance of our products.


Compact CHP units

Our cogeneration units over 50 kW

With their ability to provide and regulate power within seconds CHP units units are the perfect partner of fluctuating renewable energy sources.


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Reference examples

Whether in hotels, factories, hospitals, industrial sites or water purification plants - our compact CHP units prove efficient and reliable operation in all kinds of objects.


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