Keller + Hofer AG is a trusted provider of heating and sanitary solutions. The company specializes in efficient heating systems, heat pumps, solar and wood-based technologies, as well as high-quality sanitary installations. Services include planning, installation, modernization, maintenance, repairs, and emergency support for new builds and renovations. The focus: reliable, sustainable building technology delivered with technical expertise, clean execution, and strong customer commitment.

Ackermann AG in Egnach delivers over 120 years of expertise in professional HVAC planning and energy consulting across Eastern Switzerland. We design heating, ventilation, air conditioning and sanitary systems for residential, commercial and industrial buildings. Our services include bathroom renovation coordination, heating system replacement planning, energy optimisation and sustainable solutions focusing on renewable energy. With technical competence, precision and a commitment to quality, we support architects, builders and private clients in realising efficient building technology concepts. Contact us for tailored HVAC planning.

Sustech, as an independent engineering firm for energy and building technology, offers all services from energy consulting to planning and monitoring. We support builders in residential areas as well as in administration, schools, nursing homes, gastronomy, industry, and more. Our primary goal is to optimize sustainability and comfort. • GEAK • Energy Consulting • Building Physics • HVAC Planning • Fossil-Free Heating • Photovoltaic Planning

Consulenza completa, lavoro svolto con competenza e prezzi giusti. posso tranquillamente proporvi a nostri conoscenti.

Sehr nette und kompetente Fachleuten

Sehr geehrter Herr Vier Nochmals herzlichen Dank für Ihre flotte und zuverlässige Arbeit. In der heutigen Zeit ist es sehr selten, solch eine kompetente Beratung zu erhalten, von der Auftragsannahme, der Ausführung bis hin zur Abrechnung hat alles reibungslos funktioniert. Ich empfehle Sie wärmstens, eine solche Handwerker-Arbeit findet man heute leider selten. Gerne wieder! Gruss R.

Von A-Z alles professionell, freundlich und kompetent, ich werde euch gerne stets weiterempfehlen! Liebe Grüsse Ronny