Plumbing & Building Services

Guldager Immobilien AG 

Füllinsdorf · Since 2016

Guldager Immobilien AG provides water treatment equipment and solutions, including softening, reverse osmosis and ultrafiltration, and offers corrosion protection technologies such as cathodic protection. The company also delivers after‑sales services including spare parts supply, repairs and technical support.

Guldager (Schweiz) AG 

Füllinsdorf · Since 1995

Guldager (Schweiz) AG supplies water treatment equipment and corrosion protection solutions for commercial and industrial applications. Products and services include softening, reverse osmosis, ultrafiltration, bacterial control, cathodic corrosion protection and after‑sales support.

Gusti Gebäudetechnik GmbH 

Villmergen · Since 2020

Gusti Gebäudetechnik GmbH provides tailored solutions in sanitary installations, heating, ventilation and bathroom renovations, and offers service and maintenance. The company undertakes installation and renovation projects and provides a 24‑hour service option.

Gwerder Fidel Energietechnik AG 

Ibach · Since 1978

The core activity of GF Energietechnik AG is the planning, implementation and maintenance of building technology, particularly in the areas of energy efficiency and environmental technology.

Hagmann AG 

Rorschach · Since 1976

The core activity of Hagmann AG is the planning, implementation and maintenance of heating, ventilation, air conditioning, refrigeration and industrial systems. The company offers solutions for heat generation and distribution, including renewable energy sources such as air, earth and sun, as well as fossil fuels. It also provides services such as installation, revision, expansion and maintenance of systems, as well as expert advice and emergency services for customers.

Häni Komplettumbauten 

Uttwil · Since 2007

Häni Komplettumbauten is a trades company providing complete conversions and renovations, together with construction management and planning services. Its offerings include plastering, rendering and painting, sanitary and heating work, floor coverings, electrical installations, plus repair, maintenance and modernisation services.

Häni Komplettumbauten AG 

Güttingen · Since 2023

Häni Komplettumbauten AG is a construction and renovation firm that carries out complete conversions and renovation projects, including construction management and planning. Its services include plastering and painting, sanitary and building services, flooring and electrical work, as well as demolition, repairs and modernization.

Hans Heimgartner AG 

Riehen · Since 2022

The core activity of Hans Heimgartner AG encompasses the planning, installation and maintenance of sanitary facilities, heating systems, renewable energies, solar systems and garden irrigation systems for private and commercial customers in Riehen, Basel and the surrounding area.

Haueter Haustechnik AG 

Oey · Since 2013

The core activity of Haueter Haustechnik AG is the provision of services in the field of building technology, particularly in the areas of heating, building technology, plumbing, ventilation and water supply. The company offers customized solutions and consulting services in these areas and positions itself as a competent partner for supply technology.

Hensler Heizungen AG 

Baar · Since 2002

The core activity of Hensler Heizungen AG is the installation of heating and cooling systems in residential, industrial and commercial buildings, including thermal building renovation. This also includes the installation of concrete core systems and TABS (Thermally Active Building Systems). The company also offers services such as technical consulting, service and maintenance for heating and cooling systems.

Herzog Gebäudetechnik AG 

Goldau · Since 2008

Herzog Gebäudetechnik AG is a company providing heating, ventilation, air-conditioning/cooling and sanitary services including planning, installation and maintenance. Offerings include heat generators (oil, gas, wood, pellets, heat pumps), solar thermal systems, refrigeration/climate systems and service/maintenance contracts.

Hofer Sanitär GmbH 

Trogen · Since 1999

The core activity of Hofer Sanitär GmbH is to provide professional and customer-friendly services in the field of sanitation, heating and water supply, including repair and maintenance, in the Trogen region and its surroundings.

Hollenstein Gebäudetechnik AG 

Mosnang · Since 2012

The core activity of Hollenstein AG encompasses the areas of Sanitation, Building Envelopes, and Solar Energy. Specifically, the company offers services in the following areas: Sanitation: planning, installation, and realization of bathrooms and wet cells, as well as the supply of water to the required locations. Building Envelopes: roofing, sheet metal work, and façade construction to give buildings character and protect them from wind and weather. Solar Energy: planning, installation, and realization of solar energy systems to generate heat and electricity. The company also offers propane gas and balloon gas and operates a gas depot.

Homey Haustechnik GmbH 

Jona · Since 2023

The core activity of Homey Haustechnik is the planning, installation and maintenance of energy-efficient home technology solutions, particularly in the field of renewable energies, such as heat pump technology and photovoltaics. The company offers tailored solutions for new buildings and renovations, with a focus on sustainability, efficiency and comfort.

HSR Heizungsservice Riehen GmbH 

Riehen · Since 2017

The core activity of HSR Heizungsservice Riehen GmbH is the planning, installation, maintenance and repair of heating systems as well as the use of solar energy for hot water.

HS TEAM AG 

Alpnach Dorf · Since 2002

The core activity of HS Team AG is the installation of sanitary and heating systems, including the planning and execution of projects in these areas. The company offers services such as the installation and maintenance of sanitary and heating systems and is also involved in the training of skilled workers in these areas.

Idrosun SA 

Bedano · Since 1981

The company Idrosun SA is primarily involved in the planning, installation, and maintenance of systems for the treatment of water, heat, cold, and air in various sectors such as wellness, industry, and commerce. The core activities include: * Water treatment: drinking water, wastewater, and swimming pool water treatment * Heating and cooling technology: heating, air conditioning, and refrigeration systems * Ventilation technology: ventilation and air conditioning systems * Control and regulation technology: electrical control systems, process control, and automation * Wellness: planning and installation of swimming pools, whirlpools, saunas, and steam baths In contrast, the company Filados Gabac SA focuses on the development and distribution of products and systems for water treatment, particularly: * Decalcification and water softening * Filtration and purification of water * Osmosis systems for drinking water treatment * Swimming pool technology and accessories * Anti-corrosion and rust protection for metal parts.

Idrotech Sagl 

Bedano · Since 2011

The core activity of Idrotech Sagl is the planning, installation, maintenance and repair of plants and systems in the field of thermohydraulics, particularly in the following areas: sanitary technology (installation and maintenance of sanitary systems), heating technology (installation and maintenance of heating systems), air conditioning technology (installation and maintenance of air conditioning systems), drainage technology (installation and maintenance of wastewater systems), irrigation technology (installation and maintenance of irrigation systems), and pipe cleaning and maintenance. The company also offers a 24/7 emergency service for repairs and maintenance.

Imer Istogu Sanitaire Chauffage Sàrl 

Fully · Since 2024

The core activity of Imer Istogu Sanitaire Chauffage is the installation, maintenance, and repair of sanitary facilities and heating systems in the Valais region and the canton of Vaud. This includes: The planning, installation, and maintenance of sanitary facilities, including bathrooms, toilets, and other sanitary installations; The installation, maintenance, and repair of heating systems, including the selection and implementation of efficient and environmentally friendly solutions; Rapid intervention in case of disruptions and emergencies, such as leaks or failures of heating systems; Consulting and supporting customers in the selection and implementation of sanitary facilities and heating systems tailored to their specific needs.

INAG Gebäudetechnik AG 

Zurich · Since 2023

The core activity of Inag Gebäudetechnik AG is the planning, installation, repair and maintenance of heating and sanitary systems, including individual consulting and customer service.