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For over 90 years, WEBER AG in Amriswil has been your trusted regional expert for roofs, facades and solar installations. Whether flat or pitched roofs, roof greening, façade renovation or photovoltaic systems – we deliver tailor-made and sustainable solutions. As a certified member of Swissolar and the Building Envelope Association, we combine craftsmanship, efficiency and modern design. Quality and reliability from consultation to installation – all from one source.

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.

Dönni Solar & Bau provides customized solar solutions for residential and commercial clients. From consultation and planning to the installation of photovoltaic systems, we focus on sustainable energy and top-quality service. Our expertise includes roof renovation, building technology, and energy efficiency solutions. Benefit from eco-friendly solar power and optimize your energy costs. With cutting-edge technology and years of experience, we help you transition to renewable energy.

For over a year, RUTECH GmbH has been delivering innovative and sustainable solar technology solutions throughout Switzerland. We design, install, and maintain customized photovoltaic systems for both private homes and businesses. Our mission: helping you gain energy independence through clean, renewable power. Rely on high-quality service, honest advice, and cutting-edge Swiss technology.

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

NS Elektro is a modern electrical engineering company specializing in professional installations, photovoltaic solutions, and building technology. The company serves residential, commercial, and industrial clients – from planning and installation to maintenance. Whether new construction, renovation, or smart home integration, NS Elektro stands for precision, reliability, and sustainable energy solutions. With expertise, efficiency, and innovation, NS Elektro delivers electrical systems that combine performance, safety, and future-oriented technology.