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The Cleantech Directory

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We believe in the world of tomorrow. That is why we develop sustainable energy projects that help our customers invest in a green future. InEnergie works together with experienced experts and provides concrete and realistic solutions. For example, we provide advice on sustainable projects and their financing. In addition, we manage and operate projects and assist clients through delegated project development. We are now mainly focusing on sustainable energy from heat and cold, aquathermal and solar energy.


INFA supports public waste disposal authorities and companies, especially waste disposal companies as well as EU, federal and state governments in their daily work with advice, support and solutions. We help to plan municipal areas, make decisions and improve quality and profitability.

Infinitas Design

Infinitas Design are experts at designing innovative and accessible commercial and industrial heat pump solutions.


Ing3E is a team of experienced specialists in a network of experts from different disciplines in energy supply and communication technology. Competence and innovation are combined here with expertise in planning, project management and documentation. Customer-oriented 360° advice, detailed planning and goal-oriented project management are a matter of course for us. In addition to the specific topics of the energy sector, we integrate the various sectors of energy with communication technology into an intelligent and efficient network.


Ingenia is an innovative engineering firm that specializes in processing (organic) residual flows into energy (products) and emission reduction. Ingenia's expertise consists of process technology, energy technology and emissions.

Ingenieurbüro EnergieSystemTechnik (EST)

We are an independent engineering office that consistently implements the energy transition. For your property, we plan the building technology and building physics with you in a sustainable, energy-saving manner and efficient, taking into account renewable energies and future-oriented technology.

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