GREENTECH! - Energy Efficiency

The rational and frugal use of energy has become a key factor for the competitiveness of entire industrial branches and human society. Saxony’s companies actively participate in various fields with the objective of using energy reserves more sustainably in the future.

Lamellenwärmetauscher, WätaS Wärmetauscher Sachsen GmbH aus Olbernhau

Source: WätaS Wärmetauscher Sachsen GmbH


The Olbernhau-based WätaS Wärmetauscher Sachsen GmbH commenced as a start-up business with the production of laminated heat exchangers in 2003. This evolved into the WätaS Group with more than 130 employees. Its core business is the development and production of individual, customer-specific heat exchangers made of the materials stainless steel, copper, aluminum, and steel. Heat pumps and heat pipes as well as low temperature heating systems are also part of the company’s product portfolio. WätaS develops energy efficiency concepts for residential homes, public buildings, and production facilities.

Gebäude der Solarsiedlung „Rittergut Rabenstein“ in Chemnitz - ein ENERGETIKhaus100 ® von FASA AG Chemnitz

Source: FASA AG


The FASA AG is a medium-sized construction firm headquartered in Chemnitz. With its ENERGETIKhaus100®, the company has developed a building which is supplied with solar energy and requires neither any oil or gas fired nor any heat pump heating system. 90 percent to 100 percent of the heat demand for heating and warm water is covered by solar energy. This is ensured by the intelligent interaction of the solar architecture, the large-scale solar thermal system, and the centralized long-term heat storage as well as a thermal insulation with massive, ecological building materials. The rest is done by a stove with a heat exchanger. The innovative building concept was created in cooperation with the Freiberg University of Mining and Technology. 


The research and consulting firm Leipziger Institut für Energie GmbH (IE Leipzig) addresses technical, economic, and ecological questions revolving around the national and international energy markets. This includes the entire value creation chain ranging from the production to the distribution all the way to the efficient use of energy. The requisite results are prepared in the form of expert’s reports, market and feasibility studies, environmental performance evaluations, recommendations, and concepts. The aspect „energy and society,“ with a specific focus on the energy turnaround, is of great relevance for the consulting services.

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