Heating installer in
Herisau

LEVA Group GmbH

Since 2000 · 11–20 empl.·4.8(306)

LEVA Group GmbH is a general contractor for construction projects and building services. It plans and carries out renovations, conversions, bathroom refurbishments and extensions, and provides heating, ventilation, air-conditioning and plumbing work, as well as the sale and installation of heating products.

Diener Haustechnik AG

Since 2010 · 1–10 empl.·4.7(13)

Diener Haustechnik AG provides plumbing, heating and solar technology services, as well as tank inspections. Its work includes installations, repairs and maintenance for new buildings and renovation projects.

Nigg Energietechnik AG

Since 1998 · 11–20 empl.·4.8(6)

Nigg Energietechnik AG plans and installs heating, ventilation, air-conditioning and refrigeration systems for new buildings and renovations. Its services include heat generation and distribution systems, as well as maintenance, repairs and conversions.

Hablützel Gebäudetechnik AG

Since 2018 · 11–20 empl.·5.0(6)

Hablützel Gebäudetechnik AG is a building-services company working in plumbing, heating, solar energy, and air conditioning and ventilation. Its services include consulting, planning, installation, maintenance, and repairs.

Schwizer Haustechnik AG

Since 1996 · 1–10 empl.

Schwizer Haustechnik AG plans and delivers building-services solutions for bathroom renovations, plumbing, heating and ventilation. Its services also include maintenance and a 24/7 emergency service for plumbing and heating systems.

Alder Haustechnik GmbH

Since 2016 · 11–20 empl.·4.4(25)

The core activity of Alder Haustechnik GmbH encompasses the installation and construction of building technology systems, particularly in the areas of: Sanitary, Heating, Ventilation, and Pipeline construction. The company thus provides services in the field of building technology, including planning, installation, and maintenance of systems for sanitary facilities, heating systems, ventilation systems, and pipelines.

Duttwyler - Service GmbH

Since 2006 · 1–10 empl.·5.0(4)

Duttwyler - Service GmbH provides heating-system servicing and repairs, as well as advice and sales of heating equipment. Its range includes heat pumps, oil and gas heating systems, and solar and wood heating systems.

HYDROTHERM Heizung & Sanitär AG

Since 2016 · 1–10 empl.

Heizung und Wasser Enns

Since 2025 · 1–10 empl.