The expo is over – new ideas for the future

The Hanover Messe 2023 is over and the exhibition stand has been dismantled. We can draw a very positive conclusion and would like to take this opportunity to thank all our visitors at our stand for the fantastic discussions and the great interest in our fuel cell CHP inhouse5000+ and inhouse5000+hydrogen!

One thing we can say after the Hanover Fair: Our future building energy supply cannot be exclusively electrified!
Many buildings, especially existing ones, do not meet the requirements for this.

A modern building supply concept will have a hybrid approach and will include a combination of modern technologies and various renewable energy sources.

Our systems inhouse5000+ and inhouse5000+hydrogen can become part of these hybrid building energy supply concepts!

Talk to us and we will find a solution with you.

Visit us at the Hanover Fair!

Hanover-Fair Hall 13 / Booth F34 17.04.2023 – 21.04.2023 You are invited – visit us at the Hanover Fair!

KfW433 program expires at the end of the year – secure a funding of €29,900 now

The nationwide funding program 433 – Subsidy for fuel cells from the KfW bank will expire on December 31, 2022.

Our fuel cell CHP units inhouse 5000+ and inhouse5000+ hydrogen are funded with €29,900. Save a subsidy of €29,900 by the end of the year – even if the system is not installed until summer 2024.

The funding amount consists of a fixed amount of €6,800 and a performance-related amount. Depending on the electrical output, the fuel cell is subsidized with an additional €550 for every 0.1 kW or part thereof. For our inhouse5000+, this results in a maximum subsidy of €29,900. The funding guideline expires at the end of this year and so far no extension of the program has been announced by KfW.

At home in Berlin Friedrichshagen

Presentation of our company on the website

Click here to read the full article (in german):

We are at the Hanover Fair!

Hall 13, Booth A62/1

30.05.2022 – 02.06.2022

After two years with corona pandemic and absence, this year Hanover Fair is taking place in presence again. We are very pleased about this and cordially invite you to visit us at our booth. We present our combined heat and power system inhouse5000+, which offers considerable potential for saving energy costs and CO2 emissions.

Arrange your personal on-site meeting now and let us advise you on the cost-effectiveness and advantages of our “Made in Germany” heating.

If you are not able to visit us, please download our Data sheet inhouse5000+ and feel free to contact us.

Fuel cell heating is becoming increasingly popular

The internet portal for renewable energies has published a survey by the brokerage porta ‘’, in which almost 9,000 potential heating customers were asked. Almost 31 percent of those questioned favor fuel cell heating. At almost 48 percent, gas heating is still right at the top of the popularity scale.

Surprised? “Not really,” says Valentin Drießen, managing director of Hausfrage. “In addition to its green energy, the trend towards fuel cells can also be explained by its cost-effective use. I am sure that we will see a further increase in fuel cell heating systems over the next few years.”

We support you in your project to install a new hydrogen-powered fuel cell heating system. Contact us.


1.12.2020 | Quelle: Hausfrage | © Solarthemen Media GmbH


NEW FUNDING PROJECT “Zwanzig20 – HYPOS – H2 Home Opti”

Optimization of a decentralized energy supply with H2-PEM fuel cells in the “energy pavilion”


With the newly approved funding program “H2HomeOpti”, inhouse engineering GmbH is continuing the development of a fuel cell CHP unit for stationary energy supply based on pure hydrogen. In the “H2 HomeOpti” project, the primary research goal is the development of optimization solutions for an H2 CHP unit based on PEM fuel cells.
In the previous H2home and H2home II projects, an H2 CHP based on PEM fuel cells and its best possible building integration to achieve maximum efficiency was and is being developed and tested. In cooperation with the H2 network project, the H2 CHP unit on the test site in Bitterfeld-Wolfen is supplied with hydrogen. Specific interface problems related to the use of hydrogen in buildings are solved across projects, which is why the project is essential for the overall HYPOS strategy. The interface problems include questions about the H2 gas connection (pressure level, quality, safety, odorization).

Read more

Company move

Dear Sirs and Madames,

we hereby inform you about our move. We remain loyal to the innovation- and industrialpark in Berlin-Köpenick, but are moving to larger facilitys. So we can offer you an even better service.

From December 1st, 2020 we can be reached at the following address:

inhouse engineering GmbH
Köpenicker Strasse 325
House 11
12555 Berlin

Delivery entrance: House 12



BMWi – Research funding in the 7th energy research program “Research for a more environmentally friendly, reliable and affordable energy supply – the “Lifetime SelOx”project has started


The aim of the project is to research the thermodynamic, chemical, apparatus and operational principles for a SelOx reactor for co-fine cleaning in reformers for PEM fuel cell CHP systems as well as the integration of a functional model in a 5 kW micro-CHP system.

In close cooperation, the partners in “Lifetime SelOx” will evaluate the performance and long-term stability of the newly developed SelOx reactor during plant operation.

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Sail sponsoring

Inhouse Engineering GmbH as sponsor for the sailing club Fratemitas 1891 e. V.


We support the sailing club as a sponsor with a new sail. Our logo now adorns a sail and sails around and around Köpenick.

Sponsoring Segel-Verein inhouse5000+
Foto: © Segel-Club Fratemitas 1891 e. V.