Modernize Your heating System
in Berlin

Our heating calculator shows you which heating system is most suitable for you in a non-binding instant offer and directly calculates costs and savings potential.

  • Recive your first offer in just 2 minutes
  • Competent specialist advice
  • Save costs through subsidy consulting
Get your individual offer
First offer in just 2 minutes

How can I make
a good decision?

There are many questions when it comes to heating modernization. Which heating system is right for me? Is a heat pump worthwhile? What funding is available? What are the costs? What can I save? As experts in heating modernization in Berlin, we are there to advise assist you.

  • Tailored advice from heat pump to fuel cell heating
  • Transparent facts and figures
  • High sustainability standards
  • Premium manufacturer brands, made in Germany
Go to our heating calculator

Request your non-binding heating offer

Fill out our heating calculator in just 2 minutes and enter your contact information. You will then receive a personal and non-binding offer from us via email with all the details.

Jetzt unverbindlich
Angebot anfordern

Your attractive
instant offer

After you have completed our online heating calculator, you will receive our attractive immediate offer. There, we will clearly show you which heating system is the best choice for your home in terms of energy, economy and ecology.

  • Clear instant offer with all details
  • Illustrative presentation of costs and savings potential
  • Tailored to your building situation
  • Detailed explanation and valuable tips
Calculate costs and savings potential

heating Modernization,


Find out in 2 minutes how much you can save with a new heater

Focus on

Use resources wisely for people and the environment

Government-Subsidy advisory

We'll tell you what's possible so you don't waste money

We Are The Experts

We are one of the best HVAC craft companies in terms of innovation, quality and digitalization. We also regularly receive top ratings from our customers for our work.

Erfahrungen Bewertungen zu HGZ Gebäudetechnik Berlin

The consultation was brilliant.
And we were sure which new system was right for us.

Your way to a new heating System

Fill out Our Heating calculator

It only takes 2 minutes
and it's very uncomplicated.

Advance offer

Your instant PDF with costs, savings potential and recommendations.

Consultation appointment

We'll explain all options to you.
Online or on site.


Tailored and fair for your
ideal heating modernization.


You decide and we'll take care of everything that is important.

and installation

Our heating experts will ensure
that everything runs smoothly.

Our Promise
when it comes to modernizing
your heating System


We listen and only recommend what fits


We always find the best individual route


We think and
take care of everything

Get your expert advice

We are happy to be there for you personally

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As a project planner and building energy consultant, I take care of all matters related to modernizing your heating system at HGZ. You can reach us easily via the direct contact form or by phone on +49 30 5497939-11.

We are the experts if you want to modernize your heating system in Berlin

Modernizing heating systems is a matter of trust. We are highly rated and have received numerous awards for our high quality of advice, service and execution.

  • Consistently highest customer satisfaction
  • Top service and execution
  • Highly qualified employees
  • We take care of everything
To our heating calculator


Experience and cutting-edge know-how in the perfect mix

Team of

Advice and execution by highly qualified employees


Top rated for punctuality, quality, service and advice

Got Any more questions?
We've got All the answers.

Here you can find frequently asked questions and answers on the topic modernizing your heating system in Berlin.

Wir bieten eine Vielzahl von Heizsystemen an, darunter auch Gasheizungen, vor allem aber  erneuerbare Energie-Systeme wie Wärmepumpen und PV-Anlagen.

Nein, das Angebot aus dem Heizungsrechner ist unverbindlich. Nach einer Vor-Ort-Begutachtung können wir dir ein verbindliches Angebot erstellen.

Auf jeden Fall! Nachdem du dein Angebot erhalten hast, kannst du gerne einen Termin mit uns vereinbaren, um die nächsten Schritte zu besprechen.

Du solltest Informationen zu deiner aktuellen Heizung, dem Baujahr deines Gebäudes und der Wohnfläche parat haben.

Eine moderne Heizung ist energieeffizienter, was zu niedrigeren Heizkosten führt, und sie leistet einen Beitrag zum Umweltschutz durch geringeren CO2-Ausstoß.

Das Angebot wird direkt nach Eingabe deiner Daten erstellt und dir sofort angezeigt.

Natürlich! Gib einfach die Informationen ein, die du hast. Für ein präzises Angebot können wir anschließend die Details gemeinsam klären.

Ja, unser Online-Heizungsrechner ist für dich völlig kostenfrei und unverbindlich.

Das Angebot ist eine erste unverbindliche Schätzung basierend auf den von dir eingegebenen Daten. Für ein detailliertes Angebot wäre eine Vor-Ort-Begutachtung notwendig.

Unser Heizungsrechner ermöglicht es dir, durch Eingabe von Daten zu deiner aktuellen Heizung und deinem Gebäude ein unverbindliches Angebot für eine Heizungsmodernisierung zu erhalten. Einfach die entsprechenden Informationen eintragen und den Rechner starten.

Innovation, neu gedacht

Darf man sich einfach
Kopfüber in eine neue
Technik stürzen?

Fortschritt gelingt dann am besten, wenn man neugierig auf das zugeht, was man noch nicht kennt. Denn anders ist nicht immer besser. Aber das Beste ist fast immer anders, als man denkt.

What else we can tell you about modernizing your heating System in Berlin:

Modern heating solutions for you

Discover tailor-made heating upgrades with us. Whether it's a gas heater or an air-water heat pump — we offer innovative solutions. Find out how you can save energy and costs with a new heating system.

Heat pump & photovoltaic: future-proof combination

Connect a heat pump with photovoltaics for an efficient and environmentally friendly heating solution. We'll show you how to meet your energy requirements with the best heating system of the future and at the same time comply with the new heating law.

Refurbish your heating system: Use government subsidies

Renovation of your old building heating system made easy! We help you to renovate your heating system and provide information about subsidies. Understand the costs, the obligation to renovate and how you can benefit from heating modernization in the long term.