Frequently asked questions

HGZ stands for far more than just craftsmanship! We see ourselves as true shapers of the future in building technology and as dedicated enablers for our customers. But it's not only our out-of-the-box thinking that makes us special.

The unique combination of long-standing experience, innovative problem-solving skills and maximum service focus is what truly inspires our customers.

No wonder we've already received numerous awards – including recognition as one of the best employer brands in the skilled trades.

Success always requires a strong "we". And many of our projects demand close collaboration between different departments and specialist areas. That's why a strong team culture has always been a matter of course for us – we foster open communication and respectful exchange to find the best solutions for our customers together.

We always have an open ear for the individual wishes of our employees. This includes enabling flexible working models wherever the role allows. Interested in home-office options, flexible hours or part-time arrangements? We're happy to talk it through and find out together what's possible!

Our working hours are generally Monday to Thursday 07:00–16:00 and Friday 07:00–15:00. Thanks to our good planning and structure, overtime or weekend work is extremely rare. When it does occur, we always strive to compensate accordingly.

Our onboarding is clearly structured so you settle in smoothly and quickly feel part of the HGZ team. New employees are always paired with an experienced colleague who acts as a mentor. In the first weeks you'll get to know all the key processes, our products and our customers – step by step.

Anyone who wants to grow at HGZ gets our active support. Through internal training and the opportunity to take on real project responsibility, you can develop professionally at any time. We also offer attractive prospects for leadership positions and specialist roles.

We place great importance on the continuous development of our employees. That's why we offer regular training and workshops – covering both technical skills and soft skills. We also actively support participation in external further education and professional certifications.

Our application process is intentionally streamlined to make it as easy as possible for you. You can apply without a cover letter or CV directly via WhatsApp, e-mail or our application form. We review every application carefully and get back to you quickly.

For most positions you should have a completed apprenticeship in plumbing, heating or HVAC technology. Depending on the role, additional qualifications such as a master craftsman's certificate or specialist certifications can be an advantage. Of course we are also happy to hear from motivated career changers!

We understand that every project has its own characteristics, and we offer tailor-made solutions adapted to your specific needs.

Yes, we offer consultation and solutions for water treatment and conservation, tailored to the specific needs of your property.

We work with a wide range of brands and manufacturers to find the optimal solution for every requirement.

Our specialists are highly qualified and certified, and we guarantee quality through regular training and inspections.

We are committed to full transparency in our pricing and provide detailed, easy-to-understand cost estimates.

We offer thorough analysis and consultation for the modernisation or replacement of old heating systems to increase efficiency and sustainability.

Yes, we offer consultation, installation and maintenance of renewable energy systems such as solar thermal and heat pumps.

Of course. We offer tailor-made maintenance contracts adapted to the needs and requirements of your properties.

Yes, we offer a 24/7 emergency service for urgent repairs and breakdowns. This service is exclusively available to our maintenance customers.

We specialise in heating, plumbing and HVAC technology, including maintenance, repairs and new system installations.

We specialise in the planning and implementation of barrier-free sanitary facilities to ensure accessibility and usability for all persons.

We are experienced in dealing with the special regulations and guidelines for public buildings and actively support you in complying with them.

We work closely with our clients to develop solutions within the given budget framework without compromising on quality.

Yes, we offer comprehensive maintenance and service contracts to ensure the long-term functionality and efficiency of the installed systems.

We plan and carry out our work in a way that minimises disruption to the facility's operation – for example by working outside regular care hours.

We are happy to provide you with our references from previous projects in the public sector.

Yes, we place great emphasis on sustainable, energy-efficient technologies and materials that minimise the ecological footprint of facilities.

We take into account the special needs of children and young people and rely on safe, durable and easy-to-use solutions.

Of course. We strictly adhere to the relevant safety and quality regulations for public facilities.

Yes, we have extensive experience in the on-schedule execution of renovation projects in schools and other public facilities.

Our quality management is based on strict internal guidelines and control procedures to guarantee the highest quality and customer satisfaction. This is also reflected in the "Profi im Handwerk" certification, which covers many elements of DIN ISO 9001.

We are happy to show you a selection of our reference projects that demonstrate our expertise and experience in similar endeavours.

Yes, we have extensive experience in the planning and installation of renewable energy systems at various scales and levels of complexity.

We are experienced in realising sophisticated, modern sanitary facilities for a wide variety of residential and commercial buildings.

We rely on careful planning and close coordination with all parties involved to deliver projects within the given time and budget framework.

Our teams are trained to respond flexibly and efficiently to changes in the course of a project to ensure smooth implementation.

Of course, we support you in complying with all relevant regulations such as the GEG (Buildings Energy Act) and advise you on the best implementation options.

We place great emphasis on the use of sustainable and energy-efficient technologies, including PV systems, heat pumps and modern heating technology.

Yes, we specialise in individual solutions and adapt our HVAC systems to the specific requirements and conditions of each project.

Our HGZ service team is always ready to respond quickly and efficiently to emergencies. In most cases we are on site within a few hours.

Yes, we offer a 24/7 emergency service exclusively for our maintenance customers. For urgent matters, please contact our HGZ service team directly – they're always there for you!

The HGZ service team only uses high-quality, approved spare parts to ensure optimal function and safety.

Should the HGZ service team discover a defect, they will notify you immediately and provide recommendations for next steps.

A maintenance check covers the inspection of all functions, cleaning, possible replacement of wear parts and a safety check. The HGZ service team carries out everything professionally and thoroughly.

The duration depends on the system and the scope of maintenance, but it generally takes a few hours. The HGZ service team will always aim to work as efficiently as possible.

Our HGZ service team is available for all maintenance and service questions. You can contact them at any time.

Costs vary depending on the scope and type of system. Our HGZ service team will provide you with a personalised quote.

Of course! A maintenance contract ensures regular check-ups and priority treatment. The HGZ service team will be happy to inform you about the details.

For optimal performance and longevity, we recommend having systems serviced at least once a year. Your HGZ service team will take care of all the details.

Regular maintenance extends the lifespan of your systems, improves energy efficiency and reduces the risk of breakdowns. The HGZ service team ensures everything runs perfectly.

Yes, we offer various storage solutions, including battery storage for photovoltaic systems, to make optimal use of self-generated electricity and increase grid independence.