EK Energiekonzepte AG is an engineering consultancy based near Zurich, Switzerland, with offices in Zurich and Liechtenstein. The company was established in 2007 as a joint initiative of the architecture firm Bob Gysin + Partner and 3Plan AG, evolving from the Initial Project Forum Chriesbach. Lenum AG, based in Liechtenstein, became closely affiliated in 2010, and since then, the two firms have functioned as sister companies.
The company employs an interdisciplinary team and focuses on consulting in the areas of lighting, energy, building physics, and sustainability. They provide guidance throughout all planning phases of construction, addressing ecological considerations, user comfort, architectural quality, and economic viability. EK Energiekonzepte AG works with building owners, architects, and planners, presenting objective and independent advice.
The firm is involved in a broad range of projects, including residential, commercial, and educational buildings. Notable recent work includes the Mülihof Hotel and Residential Building in Alberswil, where EK Energiekonzepte AG was responsible for building physics and sustainability. They have also contributed expertise in building physics and acoustics to Lokstadt, a major urban development in Winterthur encompassing over 37,000 square meters, and served as services engineer for the Geistlich Schlieren housing project near Zurich.
EK Energiekonzepte AG maintains active collaboration with universities and is involved in professional associations related to sustainable building and engineering. Unlike some contemporaries, the company's activities remain firmly centered on consulting and technical solutions, rather than product sales or turnkey project delivery models.