History - Bosch KWK Systeme

History - Bosch KWK Systeme

Bosch KWK Systeme has been possesses decades of experience
in the combined heat and power segment since 1983.

  • 1978

    Helmut Ziegler acquires a locksmith's shop with three employees and founds the Ziegler metalworking company. The profits generated are used to invest in new ideas: the foundation stone for Köhler & Ziegler is laid.

  • 1981

    In the summer of 1981, Harald Köhler approaches Helmut Ziegler with the idea of constructing stationary CHP units using mass production engines. With their combined knowledge from engineering, metalworking and electrical engineering, the first "Erlkönig" pilot gas CHP unit is built for the sewage treatment plant in Lich.

  • 1983

    The success of the "Erlkönig" CHP unit leads to the foundation of the Köhler & Ziegler OHG trading company. Design and engineering are undertaken by the Köhler engineering company, while construction and manufacture is performed by the Ziegler metalworking firm.

  • 1984 / 1985

    Köhler & Ziegler obtains a research contract in the German state of Hesse. In 1984, thanks to a catalytic converter test bench, Köhler & Ziegler makes a significant contribution to the development of the German legal framework for the specification of emission limits – the 1/2 TA Luft (Technical Instructions on Air Quality Control).

  • 1986

    Purchase and renovation of new premises in Auweg, Lollar, expands the office space and production area to 1,500 m².

  • 1993

    Expansion of the production area to a total of 2,400 m².

  • 1999

    Certification in accordance with ISO 9001 and EU Eco-Management and Audit Scheme (EMAS).

  • 2001

    The first CHP system with an output of 1,010 kW is installed at a confectionery manufacturer. This system reduces the company's annual CO2 emissions by 5,000 t.

    Thanks to trigeneration, Köhler & Ziegler also offers an air conditioning option.

  • 2005

    First generation of the Köhler & Ziegler ORC system is put into operation. Development of a new container concept. All the essential components of a CHP unit are installed compactly in one container. Used with a circular digester, the production and use of biogas are perfectly coordinated with one another.

  • 2007

    The new Werk II production hall, comprising 500 m² of office space and staff rooms, a 2,300 m² production area and a total area of 12,500 m², provides plenty of space for technology and innovative ideas. Combined with Werk I, the total production area of Köhler & Ziegler increases to 4,700 m².

  • 2008

    From August 2008, Köhler & Ziegler supplies the Buderus brand of Bosch Thermotechnik GmbH with CHP units for the low to medium output range. The product range is made up of CHP units in the following five module sizes: 19, 50, 70, 140 and 240 kW.

  • 2010

    Bosch Thermotechnik GmbH, the leading supplier of heating products in Europe with strong positions in all key market segments, takes over Köhler & Ziegler Anlagentechnik GmbH in March 2010. The acquisition makes Köhler & Ziegler a wholly-owned subsidiary of the Bosch Thermotechnology Division.

  • 2011

    The former Köhler & Ziegler Anlagentechnik GmbH is rebranded as 'Bosch KWK Systeme GmbH'. The company will benefit even more from the great reputation and high name recognition of Bosch worldwide. Relocation of management to Justus-Kilian-Strasse.

  • 2012

    Since April 2012, Bosch KWK Systeme has been marketing its systems under the Bosch brand name, replacing the Köhler & Ziegler name. Köhler & Ziegler's established product range has been maintained and will be expanded going forward.

  • 2013

    30 years of experience in CHP business.

  • 2015

    Complementary product - Our new compressed air heat power plant.