Energy consulting in
Jona

Energie Zürichsee Linth AG

Since 1999 · 21–50 empl.·4.4(9)

Energie Zürichsee Linth AG supplies customers with gas, biogas and district heating, and advises on heating, heat and cooling systems. It also plans, builds and operates energy facilities and gas, water and heat distribution networks for businesses, utilities and municipalities.

W+L Partner AG

Since 2006 · 21–50 empl.·4.7(10)

W+L Partner AG provides planning and consulting for energy and building services. Its work includes heating, ventilation, air conditioning, cooling, plumbing, solar and drainage systems, as well as energy consulting, building concepts and BIM coordination.

Homey Haustechnik GmbH

Since 2023 · 1–10 empl.·4.9(14)

Homey Haustechnik GmbH plans, installs and maintains heating and building-services systems, with a focus on heat pumps. Its services also include biomass heating, ecological cooling systems, residential ventilation, energy advice and client representation in construction projects.

Enora AG

Since 2011 · 1–10 empl.

Enora AG is a consultancy and design practice specialising in energy advice, energy planning, building physics and architecture. It advises on energy-efficient renovations and new buildings, and provides services including renovation concepts, energy compliance documentation, building physics calculations, and project and construction management.

Wirkungsgrad Ingenieure AG, Zweigniederlassung Rapperswil-Jona

Since 2016 · 1–10 empl.·5.0(1)

Wirkungsgrad Ingenieure AG, Zweigniederlassung Rapperswil-Jona is a branch of an independent engineering firm for energy and building services. The company plans and supports heating, ventilation, air conditioning, cooling, plumbing, sprinkler and building automation systems, and also provides services such as energy consulting, operational optimisation and sustainable building.

trunova ag

Since 2011 · 11–20 empl.

trunova ag provides energy consulting for buildings and supports renovation projects, construction supervision and assessments of building energy use through GEAK certifications. Its services also include photovoltaic systems and solar thermal installations.

Suneco AG

Since 2016 · 1–10 empl.

Suneco AG plans and installs photovoltaic systems and offers solutions for electricity storage and self-consumption. The company advises on energy concepts and building services and provides monitoring and maintenance for photovoltaic systems.

EnergieWelt GmbH

Since 2026 · 1–10 empl.

EnergieWelt GmbH plans and installs solutions for renewable energy, smart homes and building technology. Its services include photovoltaic systems, heat pumps, energy storage, intelligent building controls, and digital tools for monitoring and analysing energy use.

Energie und Brandschutz GmbH

Since 2023 · 1–10 empl.

Energie Expert Gämperli

Since 2023 · 1–10 empl.