Heating installer in
St. Gallen
28 companies in Heating installer based in St. Gallen — name and year of registration from the commercial register. The list below shows them all.
All 28 companies in St. Gallen
John Sanitär AG
Since 2015 · 1–10 empl.4.9(29)
John Sanitär AG carries out plumbing and heating work, including new installations, alterations, renovations, maintenance and repairs. Its services also cover property drainage, sewer inspections and pipe cleaning.
SAK onergy AG
Since 2022 · 21–50 empl.5.0(24)
SAK onergy AG is an energy services provider for photovoltaic systems, battery storage, heat pumps and EV charging stations. It advises on, plans, installs and services energy systems, and offers energy management, energy communities and solutions for integrating flexible systems.
kreis wasser ag
Since 1996 · 11–20 empl.4.3(20)
kreis wasser ag is a building-services company specialising in heating and plumbing. It advises on, plans, installs and maintains heating and plumbing systems, and provides customer services including boiler maintenance.
Wirth Gebäudetechnik AG
Since 1997 · 21–50 empl.5.0(14)
Wirth Gebäudetechnik AG carries out plumbing and heating installations in residential and industrial buildings, for both new construction and renovation projects. Its services include bathroom and heating-system renovations and maintenance for heating systems.
Reto Stalder GmbH
Since 1997 · 1–10 empl.5.0(11)
Reto Stalder GmbH provides plumbing services, including repairs to sanitary equipment and heating systems, and drain cleaning. Its services also include installing and maintaining water filters and softening systems, as well as bathroom renovations and installations.
Zürcher Wärme
Since 2004 · 1–10 empl.4.8(6)
Sanitär LaGo GmbH
Since 2005 · 1–10 empl.5.0(6)
Sanitär LaGo GmbH installs, renovates and refurbishes plumbing and heating systems in new and existing buildings. Its services also include water treatment, industrial technology, and repair and emergency services for plumbing, heating and industrial systems.
Hälg & Co. AG
Since 1981 · 101–500 empl.
Hälg & Co. AG plans, installs and maintains building services systems. Its services include heating, cooling, ventilation and air-conditioning systems, as well as building automation, maintenance, renovations and ventilation cleaning.
Schwizer Haustechnik AG
Since 1988 · 1–10 empl.
Schwizer Haustechnik AG plans and installs bathroom, plumbing, heating and ventilation systems for new buildings and renovations. It also provides maintenance, repairs and emergency services for plumbing and heating systems.
Bion Bauhaus AG
Since 1994 · 11–20 empl.
Bion Bauhaus AG is part of Heim AG Heizsysteme. The business offers heat pumps, wood-fired heating systems and other renewable-energy heat generators, as well as energy management systems.
Jenny Gebäudetechnik AG
Since 2009 · 11–20 empl.
Jenny Gebäudetechnik AG plans and installs plumbing and heating systems for new buildings and renovations, and carries out repairs and maintenance. Its services also include solar and photovoltaic systems.
E3 HLK AG
Since 2010 · 21–50 empl.5.0(6)
E3 HLK AG plans and installs heating, ventilation and cooling systems for buildings. Its services also include maintenance, repairs, operational optimisation, conversions and renovations.
H. Fatzer AG, Heizung-Lüftung-Sanitär
Since 1972 · 1–10 empl.3.8(15)
H. Fatzer AG, Heizung-Lüftung-Sanitär plans, installs, renovates and repairs heating, ventilation and plumbing systems. Its services also include maintenance and servicing, with solutions for heating systems, controlled ventilation, water and wastewater installations, and hot-water preparation.
LULI - Haustechnik
Since 2000 · 1–10 empl.5.0(3)
LULI - Haustechnik installs and maintains heating and plumbing systems in new and renovated buildings. Its services include a range of heating systems, burner maintenance and a 24-hour emergency repair service.
Mauron Gebäudetechnik GmbH
Since 2001 · 1–10 empl.4.3(12)
Mauron Gebäudetechnik GmbH plans and installs heating, ventilation, cooling and plumbing systems, and provides engineering planning for building services. Its services also include maintenance and support, including a 24/7 emergency service.
Luli Haustechnik GmbH
Since 2017 · 1–10 empl.5.0(3)
Luli Haustechnik GmbH installs, maintains and repairs heating, plumbing and combustion systems, and provides related service and sales. Its work includes heat pumps, oil, gas and wood-fired heating, plumbing installations, bathroom renovations and burner servicing.
Müller Brenner-Service GmbH
Since 2005 · 1–10 empl.4.1(9)
Gebrüder Zotti GmbH
Since 1995 · 1–10 empl.5.0(3)
Gebrüder Zotti GmbH plans, installs and maintains heating and air-conditioning systems, as well as ventilation and solar systems. Its services include advice on heating, ventilation and solar technology and solutions for heating and indoor air.
Huser Haustechnik GmbH
Since 2022 · 1–10 empl.
Huser Haustechnik GmbH plans and installs heating and plumbing systems for new buildings, conversions and renovations. Its services include repairs and the installation of heat pumps, radiators, underfloor heating and plumbing fixtures.
Pfister-Heizungen AG
Since 2024 · 11–20 empl.4.6(7)
Pfister-Heizungen AG plans, installs and services heating systems. Its services include heating renovations, new-build installations, heat pumps, other types of heating systems, solar installations and residential ventilation.
AT-Baumanagement GmbH
Since 2020 · 1–10 empl.
AT-Baumanagement GmbH operates in building and energy technology. It advises on heat pumps and solar and photovoltaic systems, and offers energy-efficient windows as well as support with planning, installation and service.
TechInstall GmbH
Since 2021 · 1–10 empl.
TechInstall GmbH plans and installs heating, plumbing, refrigeration and ventilation systems for residential, commercial and industrial buildings. It also provides servicing, repairs and maintenance for these systems.
VRA Haustechnik GmbH
Since 2025 · 1–10 empl.
VRA Haustechnik GmbH plans and installs heating systems and provides repairs, maintenance and servicing for heating systems, heat pumps and air-conditioning systems. Its services also include maintenance work on sanitary installations.
Burkart & Co. Heizungen u. Oelfeuerungen
Since 1982 · 1–10 empl.
Haustechnik Eugster AG
Since 2020 · 1–10 empl.
Instagroup GmbH
Since 2022 · 1–10 empl.
Hablützel Gebäudetechnik AG
Since 2024 · 1–10 empl.
Thermnova Gebäudetechnik GmbH
Since 2025 · 1–10 empl.
Heating installer in St. Gallen
Heating installer in the region
Point size by number of companies per place.
Source: commercial register (Zefix) · as of November 15, 2026
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