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Your reliable partner for district heating and electricity from biomass

What do we do, and why?

We get to grips with the details of your project plans, provide forward-looking advice and develop a solution tailored to your specific requirements. CALIQUA is right by your side – from planning and construction through to commissioning and servicing your thermal plant. That’s how we are able to ensure that the plant is implemented to meet your needs and current requirements. We also transport district heating safely through pipelines from the thermal power plant to the place where it is actually needed. 

The services we offer are designed to help you lower your carbon emissions and make a significant contribution to the energy transition.

CALIQUA is Switzerland’s leading provider of thermal power plants for municipal service providers and industry. We implement energy systems, combined heat and power plants and district heating systems – from design only through to turnkey plant projects. We’re a team of around 100 thermal power plant specialists.

Who are we?

Competent and local. Our management team has decades of experience: in engineering, plant construction and servicing, and as points of contact for customers and employees.


Executive Board

  • Samuel Kocher


  • Christoph Frings

    Head of Plant Engineering and Servicing

  • Klaus Fischer

    Head of Business Development & Sales

  • Roland Dietler

    Head of Engineering

  • Mike Müller

    Head of Installation


  • Michael Ritter

    Head of Service

  • Moritz Glauser

    Head of System Engineering

  • Ralf Kuske

    Head of Process Engineering

  • Christian Toschka

    Head of Construction

  • Mehmet Atila

    Head of Quality

  • Martin Ranz

    Head of Puchasing

  • Michael Mäder

    Commercial Business Partner

Our story

Leading the way for 90 years

CALIQUA AG can look back on a successful company history that spans over 90 years. It’s a history shaped by strong commitment to providing outstanding solutions and services in the field of thermal plants.

Patent for a hot water pipe by CALIQUA Berlin.

Founding of CALIQUA AG in Basel.

Acquisition of CALIQUA by Sulzer AG, integration into the building services division.

Founding of CALIQUA Powertec GmbH, headquartered in Weil am Rhein (DE).

Sulzer sells the Sulzer Infra division, and therefore CALIQUA, to Belgium-based Fabricom SA. Sulzer Infra becomes Axima. Fabricom is a company belonging to the Suez Group.

Company name changes from CALIQUA AG Basel to CALIQUA AG. CALIQUA AG remains a wholly owned subsidiary of Axima Schweiz, headquartered in Winterthur.

Suez Energy Services (SES) is newly formed within the Suez Group. Axima Schweiz, and therefore CALIQUA AG, are assigned to the international business unit of SES.

Our parent company Axima Schweiz moves its headquarters to Zurich. Suez and Axima merge to form the new GDF Suez Group. Axima now operates under the name Cofely.

GDF Suez becomes ENGIE. Cofely now also operates under the ENGIE name.

CALIQUA celebrates its 90th anniversary.

Our parent company ENGIE Schweiz becomes EQUANS Schweiz.