Plumbing & Building Services

KS Konrad Studer GmbH 

Bremgarten B. Bern · Since 2010

The core activity of Konrad Studer GmbH is the planning, installation and maintenance of sanitary and heating systems, including solar systems, heat pumps and pellet heating systems.

Künzler-Haustechnik GmbH 

Zurich · Since 2021

The core activity of Künzler Haustechnik GmbH is the installation, repair and maintenance of sanitary and heating systems, including solar systems, in the Zurich region. This also includes services such as planning, consulting, decalcification, replacement of sanitary fittings, repair of defective pipes and 24-hour emergency service.

Kurmann Gebäudetechnik GmbH 

Roggliswil · Since 2024

Kurmann Gebäudetechnik GmbH provides consulting, planning and execution of heating, sanitary and ventilation systems, including maintenance, repair, renovation and new-build installations. Services include heat pumps, wood/gas/oil/pellet heating systems, underfloor heating, boiler service and controlled residential ventilation.

Kurtisi AG 

Gossau Zh · Since 2010

Kurtisi AG provides heating, climate and sanitary engineering services, including planning, installation and maintenance of building systems. Its service range includes heat pumps, solar hot-water systems, ventilation and air-conditioning, bathroom and kitchen renovations, and project management.

Lang Heizungen AG 

Niederönz · Since 2014

Lang Heizungen AG provides heating and cooling engineering services, offering consulting, planning, installation and maintenance for new builds, renovations and repairs. Its system portfolio includes heat pumps, solar thermal systems, wood-fired heating, oil and gas boilers, TABS and cooling/heat-recovery solutions.

Lang Heizungen AG 

Langenthal · Since 2016

Lang Heizungen AG provides consulting, design, installation and maintenance services for heating and cooling systems. It plans, installs and services heat pumps, solar thermal systems, wood-fired, oil and gas heating systems, TABS (thermally activated building systems) and building cooling solutions.

Lang + Wälti GmbH 

Thalwil · Since 2010

Lang + Wälti GmbH is a plumbing company that provides bathroom and kitchen remodels and repair services for taps and toilet systems. Its offerings also include work on household supply lines and conversions of single- and multi-family homes, including utility/laundry rooms.

La Quercia nel Bosco 

Comano · Since 2022

The core activity of Elex Italia is the national distribution of electrical products and systems, particularly in the field of building automation, air conditioning, heating and production of hot water. The company acts as a consortium and part of a European network of independent distributors to offer a wide range of products and services to installers and customers.

Laski - Haustechnik GmbH 

Bäretswil · Since 2024

Laski - Haustechnik GmbH provides heating services and heating-system renovations, sanitary installations including water-softening systems, and planning and installation of solar PV systems. The company performs maintenance, modernisation and operates a 24/7 emergency service.

Lauber Haustechnik GmbH 

Zurich · Since 2015

The core activity of Lauber Haustechnik GmbH is the planning, installation and maintenance of building technology systems, particularly in the areas of heating, cooling and sanitary technology, with a focus on ecological and thermal solutions.

Laurent et Bernard Charrière Sàrl, Installations chauffage et sanitaire 

Cerniat Fr · Since 2006

Laurent et Bernard Charrière Sàrl, Installations chauffage et sanitaire provides complete installation, maintenance and emergency repair services for heating and sanitary systems, water supply and ventilation.

L & B Components GmbH 

Dübendorf · Since 2000

L & B Components GmbH develops and sells building-services components, with a focus on compact water-meter assemblies and associated installation and cover solutions. Its product range includes the KQ‑Compaq Small, water‑meter sections, covers and blind caps, washbasin panels, mounting brackets and connection elements.

LEAL Haustechnik GmbH 

Düdingen · Since 2024

LEAL Haustechnik GmbH provides building services, offering sanitary (plumbing), heating, planning and consulting services. The company also operates a 24/7 emergency service and carries out work on energy-efficient system solutions.

Lehmann AG 

Schmitten Fr · Since 2016

Lehrlingsstiftung suissetec aargau Gebäudetechnik-Genossenschaft 

Aarau · Since 1988

Lehrlingsstiftung suissetec aargau Gebäudetechnik-Genossenschaft is a trade association in building services that connects member companies and provides vocational training, inter-company courses and member services such as workshops and safety guidance.

Leibacher Sanitär GmbH 

Schaffhausen · Since 2018

Leibacher Sanitär GmbH is a plumbing company that provides service, maintenance and repairs as well as renovation and new-build installations in building sanitation. Services include full sanitary planning, sewerage planning and coordination of plumbing with heating, ventilation and electrical trades.

Lemp Haustechnik AG 

Murgenthal · Since 1996

The company Lemp offers various services and products in the field of sanitary, heating and roofing technology. The core activities include: Sanitary: installation, maintenance and repair of sanitary systems; Heating: installation, maintenance and repair of heating systems; Chimney systems: installation, maintenance and repair of chimney systems; Sheet metal work: manufacture and installation of sheet metal work such as gutters, downspouts and other metalwork; Flat roofs: installation and maintenance of flat roofs; PREFA roofing: installation of roofs with PREFA products; Green roofs: installation and maintenance of green roofs; Metal facades: manufacture and installation of metal facades; Lightning protection systems: installation and maintenance of lightning protection systems; Emergency service: 24-hour emergency service for sanitary, heating and other emergencies. The company also offers apprenticeships for trainees.

LEN Haustechnik GmbH 

Schlatt Tg · Since 2022

LEN Haustechnik GmbH provides planning, installation and maintenance services for heating, sanitary (plumbing) and solar (photovoltaic) systems, and performs repair work. The company also handles renovations, technical fixes (e.g., taps, thermostats, blockages) and offers a 24/7 emergency service.

Lenova energia GmbH 

Pontresina · Since 2014

The core activity of Lenova energia GmbH is in the field of building technology and energy consulting, particularly in the planning and implementation of modern heating systems, sanitary facilities and energy-efficient solutions for buildings.

Leo Galli Montagen GmbH 

Trimmis · Since 2009

Leo Galli Montagen GmbH carries out work in the areas of pipeline construction, building services, fire protection, insulation and trade.