Energy & Environment

Vuna GmbH 

Dübendorf · Since 2016

The core activity of Vuna GmbH is the development and implementation of alternative (waste)water systems, including sanitary systems, drinking water systems, urine recycling technologies and recycling fertilizers. The company offers sustainable, site-specific solutions for wastewater treatment, resource recovery and drinking water treatment, particularly for remote or special applications such as tiny houses, mountain huts or urban new-build districts. An important part of the activities is the production of Aurin, a urine fertilizer that is considered the world's first officially approved urine fertilizer.

Wärmeverbund Riehen AG 

Riehen · Since 2009

The core activity of Wärmeverbund Riehen AG is the decarbonized heat supply of the municipality of Riehen through the operation of a heat network, the use of geothermal energy and the provision of related services.

Wasserversorgungsgenossenschaft Neuenkirch 

Neuenkirch · Since 1929

The core activity of Wasserversorgung Neuenkirch is to provide drinking water and fire water to the inhabitants of Neuenkirch and Sempach Station, including the maintenance and upkeep of the pipe and pipeline network, as well as advising and supporting customers with questions and problems related to water supply.

W. Bissegger AG Wil 

Wil Sg · Since 1984

The company provides comprehensive services in the field of heating renovation and installation, including consulting, planning and execution of work for new and renovation buildings. It specializes in the renewal of existing heating systems and the installation of climate-friendly solutions such as solar systems.

WEBARIA AG 

Immensee · Since 2010

WEBARIA AG rents and sells waste-management equipment and related components such as compaction containers, balers, shredding systems, weighing and conveyor technology, and spare parts. The company also provides maintenance and repair services, breakdown support, safety training, rental and used-equipment offerings, and develops waste-disposal concepts.

WEBER DACH AG 

Zurich · Since 2003

The core activity of Weber Dach AG is the provision of services related to roofs, particularly in the areas of: roof renovation and repair, roof insulation and sealing, fall protection and installation, skylight and solar system installation, maintenance and servicing of roofs, and consulting and estimating for roof projects. The company thus offers comprehensive solutions for all types of roofing work, from new constructions to renovations and repairs.

Weber Transporte AG 

Laupen Be · Since 2013

The core activity of Weber Transporte AG is the provision of transport and disposal services, including clearances, skip rental, transport and professional disposal of waste. In addition, the company also offers advertising opportunities on its vehicles and containers.

Wicki Dach- und Fassadenbau AG 

Flühli Lu · Since 2016

The core activity of Wicki Dach- und Fassadenbau AG encompasses the planning, execution and maintenance of roofing and façade work, including the installation of solar systems, green roofs, sheet metal work and lightning protection. The company also offers services in the areas of energy saving and façade maintenance.

Wingeier Haustechnik AG 

Trubschachen · Since 2001

The core activity of Wingeier Haustechnik AG encompasses sanitary technology, water supply and drinking water hygiene. Specifically, the company offers solutions for the planning, installation and maintenance of sanitary systems, water supply systems and drinking water hygiene solutions for private and public institutions. This also includes the development and manufacture of its own products, such as well chamber covers under the Aqua-Top brand.

W. Meier AG Bilten 

Bilten · Since 1969

W. Meier AG Bilten is an electrical installation company that plans, installs and maintains electrical systems. Its services include new builds and renovations, service and maintenance, building automation, lighting, telephony, multimedia and security systems, as well as photovoltaic installations; the company also sells household appliances and manages properties.

Würsch Söhne AG 

Emmetten · Since 1976

The core activity of Würsch Söhne AG is the provision of services in the field of building envelopes, particularly in the areas of: Roofing (pitched roof, flat roof), Facades, Solar systems / Photovoltaics, Sheet metal work / Lightning protection, Renovations / Monument preservation, Under-roof / Insulations, Repair / Maintenance, Consulting / Estimating, Crane work / Lift platforms, and Bird protection. The company offers comprehensive services for new construction, maintenance, and renovation areas, combining traditional expertise with modern trends, materials, and technologies.

Zett Haustechnik AG 

Oberschan · Since 2015

The core activity of Zett Haustechnik AG is the installation, maintenance and repair of heating and plumbing systems, including the planning and implementation of projects in the field of building technology, such as the conversion of oil boilers to geothermal heat pumps. The company also offers services in the field of solar systems and sanitary services.

Ziltener-Heizungen GmbH 

Staufen · Since 2019

Ziltener-Heizungen GmbH provides consultation, installation and maintenance of heating systems, heat pumps and solar/photovoltaic systems. Services include boiler descaling and replacement, solar-panel cleaning and maintenance contracts, as well as heating renewals and system servicing.

Stratton ENERGIES Sàrl 

Neuchâtel · Since 2025

The core activity of Stratton Energies is the planning, installation and maintenance of renewable energy systems, in particular: * Photovoltaic systems (installation, panel cleaning) * Solar systems (solar carports) * Heat pumps (heat pumps) * Thermodynamic boilers * Air conditioning systems (air conditioning) * Energy efficiency solutions (CECB/CECB+) The company also provides consulting and support for applying for subsidies for energy efficiency measures in various cantons of Switzerland.

Aaki GmbH 

Diegten · Since 2016

The core activity of Aaki GmbH encompasses three main areas: 1. **Pipe and Shaft Cleaning**: Cleaning of pipes and shafts to ensure efficient and functioning infrastructure. 2. **CCTV Inspection**: Examination of channels and pipes using TV technology to inspect their condition and potential damage. 3. **Customer Masonry and Civil Engineering**: Provision of masonry and civil engineering services for private customers, public authorities, and architectural offices, including construction management and civil engineering services.

Abegglen & Co. Transporte 

Brienz Be · Since 2015

Abegglen & Co. Transporte is a family-run company providing transport, waste disposal and recycling services as well as excavation and construction transport. The company operates an Entsorgungs- und RecyclingZentrum (ERZ Lauimatte) with a sorting facility, vehicle weighbridge and container services, and offers mobile material processing equipment for recycling.

Abegglen Transporte & Tiefbau GmbH 

Brienz Be · Since 2023

The core activity of Abegglen & Co. Transporte is the execution of waste disposal and recycling works, including waste collection, material processing and transportation services.

AC/DC Solar + Elektro GmbH 

Neudorf · Since 2016

The core activity of AC/DC Solar + Elektro GmbH is the planning, consulting and realization of solar systems and electrical installations, in particular photovoltaic systems, for private and commercial customers.

AceFlex Swiss AG 

Dübendorf · Since 2022

The company's core activity is providing holistic energy solutions for businesses, particularly in the field of sustainable energy supply, including photovoltaics, eMobility and energy management systems. The company offers tailored solutions to support businesses in achieving their sustainability goals and reducing energy costs.

ADEV Energiegenossenschaft 

Liestal · Since 1985