Heating installer in
St. Margrethen SG

WWS Wärme- Wassertechnik AG

Since 1978 · 11–20 empl.·4.9(21)

WWS Wärme- Wassertechnik AG plans and installs heating and plumbing systems for new builds and renovations, as well as industrial and public buildings. Its services also include heating and plumbing maintenance and repairs, bathroom renovations, and pipeline construction.

TGS Technischer Gebäude Service AG

Since 2015 · 11–20 empl.

TGS Technischer Gebäude Service AG maintains and renews building systems for heating, plumbing, solar energy, ventilation, air conditioning, refrigeration, electrical and safety technology. Its services also include modernising and optimising energy systems and digitally monitoring installations.

LAMBDA Schweiz GmbH

Since 2021 · 1–10 empl.

The company Huggler Wärmepumpen specializes in the planning, installation and maintenance of heat pump systems.

Dolder Wärmetechnik AG

Since 1995 · 1–10 empl.·3.6(17)

Dolder Wärmetechnik AG develops and manufactures heat pumps and heat-recovery systems for exhaust air and wastewater. The company also plans, installs, maintains and repairs heating, ventilation, air-conditioning and cooling systems, including complete project solutions.

GRAVAG Energie AG

Since 1979 · 21–50 empl.·2.7(9)

GRAVAG Energie AG supplies and trades energy and provides energy services and heating solutions. The company operates and maintains gas distribution networks, installs heating systems, and supplies natural gas and biogas to households, businesses and industry.

Hörburger AG Luft- und Klimatechnik

Since 1989 · 1–10 empl.

Walter Hepp GmbH

Since 2016 · 1–10 empl.

Prusevic EMPRU Haustechnik

Since 2017 · 1–10 empl.

RohrTech GmbH

Since 2025 · 1–10 empl.