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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint744,173 companies indexed · Last updated: today
DirectoryEnergy & Environment

Energy & Environment

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IndustryEnergy & Environment
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Matching companies

9'016 companies found

Frei AG, Haustechnik Logo

Frei AG, Haustechnik 

Kirchberg Be · Since 1974

Frei AG, Haustechnik is a trade company offering sanitary installations, sheet‑metal (spengleri) work and lightning protection as well as heating and solar technology services. Its activities include planning, installation and repair of heating systems (oil, gas, heat pumps, pellets, wood), underfloor heating and radiators, boiler descaling, and sales/installation of household appliances.

Sheet Metal WorkSolar & Photovoltaics
View profile3.7(12)
Gähler & Rindlisbacher Gebäudehülle AG Logo

Gähler & Rindlisbacher Gebäudehülle AG 

Ermatingen · Since 2021

The core activity of Gähler & Rindlisbacher Gebäudehülle AG is the execution of work in the field of building envelopes, particularly in the areas of: facade construction, roof construction (flat and pitched roofs), photovoltaics, floor sealing, and maintenance and repair of building envelopes. The company thus offers a comprehensive range of services in the field of building envelopes, from planning and execution to maintenance and repair.

Solar & Photovoltaics
View profile5(12)
Gasser Elektro AG Alpnach Logo

Gasser Elektro AG Alpnach 

Alpnach Dorf · Since 1974

Gasser Elektro AG Alpnach provides electrical installations and maintenance, and plans and installs photovoltaic systems, e‑mobility charging solutions, lighting, household appliances and central vacuum systems.

Electrical Planning & InstallationSolar & Photovoltaics
View profile4.8(12)
Gasverbund Mittelland AG Logo

Gasverbund Mittelland AG 

Arlesheim · Since 1974

The core activity of Gasverbund Mittelland AG is the procurement, transportation and distribution of gas, biogas and other renewable gases through its own high-pressure network in the Mittelland region and Northwestern Switzerland.

Energy Suppliers
View profile4.3(12)
Gebr. Weber AG Logo

Gebr. Weber AG 

Ostermundigen · Since 1991

The core activity of Gebr. Weber AG is the provision of services in the field of roofing and building envelope, including: * Renovation and new construction of pitched and flat roofs * Installation of photovoltaic systems * Renovation and new construction of ventilated facades * Replacement and new installation of Velux roof windows * Maintenance and repairs on pitched and flat roofs as well as on facades The company thus offers comprehensive solutions for the roofing and facade needs of buildings.

Solar & Photovoltaics
View profile4.7(12)
Gerster Recycling AG Logo

Gerster Recycling AG 

Frasnacht · Since 2022

The core activity of Gerster Recycling AG is the disposal and recycling of valuable materials, particularly through: personal disposal consulting, competent dismantling and clearing, professional transportation, expert material preparation, and skip rental services. The company focuses on the circular economy and offers specialized services for the disposal of various materials, including electric motors, meters, cables, end-of-life vehicles and trucks.

Waste Management Industry
View profile4.8(12)
Glaus & Kappeler AG Logo

Glaus & Kappeler AG 

Brügg Be · Since 1996

The core activity of Glaus & Kappeler AG is the provision of services in the electrical industry, particularly in the areas of electrical installations, building automation, photovoltaics, e-mobility, customer service, and rental of electrical equipment and systems. The company offers a comprehensive range of electrical engineering services for private households, industry, and commerce, thereby covering the entire value chain in the electrical industry.

Energy SuppliersSolar & Photovoltaics
View profile4.4(12)
Habersaat AG Logo

Habersaat AG 

Frauenfeld · Since 1966

The core activity of Habersaat AG includes the planning, consulting, installation and maintenance of electrical systems and installations, including: electrical installations, lighting technology, e-mobility, photovoltaics and solar systems, building cabling, fiber optic and glass fiber technology, satellite systems, video and intercom systems, and device testing. In addition, the company also offers services in the fields of telecommunications, hardware and software, network and infrastructure, cloud and server hosting, as well as WLAN solutions. Furthermore, Habersaat AG also provides security technology, smart home solutions, building automation and audio systems. The company also offers a 24-hour service and comprehensive consulting and planning for its customers.

Solar & Photovoltaics
View profile4.5(12)
Hans Läuchli AG Logo

Hans Läuchli AG 

Mellingen · Since 1975

The core activity of H. Läuchli AG is the development, manufacture and distribution of heating and cooling technology solutions, particularly heat pumps, gas and oil heating systems, as well as solar thermal systems. In addition, the company offers service and maintenance services for these products.

Solar & Photovoltaics
View profile3.8(12)
Hurni Heizungen GmbH Logo

Hurni Heizungen GmbH 

Goldach · Since 2012

The core activity of Hurni Heizungen GmbH is the planning, installation, maintenance and energy consulting of heating systems, particularly in residential buildings, new and renovation projects, as well as providing services in the field of ventilation technology.

Solar & Photovoltaics
View profile5(12)
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Frequently asked questions

Searching the directory

How the search works, what each filter means, and how the results come together.

What can I search for in the directory?
The search field matches company names, industries and places. Beyond that you can filter by Industry (18 categories based on the NOGA classification), Size (number of employees), Region (canton, language region or postal code) and Special (keywords and entry date). Filters combine freely; the active ones appear as chips below the filter bar and can be removed there individually.
How do keywords work?
Keywords search the description and stated purpose of each company — the text that goes beyond the company name. Multiple keywords are combined with OR: every additional keyword widens the set of matches rather than narrowing it.
What belongs in the postal code field?
A single postal code (e.g. 8000) or a range (e.g. 1000-1010). The field accepts postal codes only — for place names, use Canton or Language region.
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How is organisation size determined?
Size reflects the number of employees and is calculated from publicly available information by a model developed in-house. It is a best-possible estimate, not an official figure.
What does the Verified label mean?
Verified means the entry is tied to a UID (Swiss business identification number) and therefore links back to the official Swiss business register. The label speaks to the company's identity — it is not a rating of its performance.

Source: Federal Statistical Office, UID register

How do I sort the results?
Use the dropdown above the list: Relevance, Name (A–Z), Best rating, Most reviews or Longest established. You can also switch between list and map view and set how many results appear per page.