Assemblin strengthens heating & sanitation capacity in Västergötland

Assemblin Heating & Sanitation has acquired Johansson o. Gunverth VVS- och El AB (“J&G”) with 33 employees and annual sales equivalent to SEK 72 million.

J&G was established in 1917 and has its office, a shop and a warehouse in Rävlanda (between Borås and Gothenburg), and is today owned by Lennart Andersson and Joakim Weiss. The operations encompasses superior departments for project- and service assignments. The customer base is diversified, comprising both private and corporate customers.

“J&G has stable and reputable operations with a broad customer base. It is also a company that complements our current Heating & Sanitation operations in western Sweden well geographically, and I am therefore very pleased with this acquisition,” says Andreas Aristiadis, EVP and CEO Assemblin H&S.

“We are very proud of our current operations and perceive potential for continued growth and development. It is nonetheless time to switch to new ownership, which will benefit J&G in the long term. We look forward to our continued journey with great anticipation,” says Joakim Weiss, President at J&G.

For further information, contact:
Andreas Aristiadis, EVP and CEO Assemblin H&S (Sweden),, +46 10 475 20 12
Joakim Weiss, President at J&G,, +46 707 736 842
Åsvor Brynnel, EVP Sustainability, HR and Communications, Assemblin Caverion Group,, +46 10 475 39 48

About Assemblin

Assemblin is an end-to-end installation and service partner with operations in Sweden, Norway and Finland. We design, install and maintain technical systems and solutions for air, water and energy. Our vision is to create smart and sustainable installations that make buildings work and people feel comfortable. We make this possible through close local collaboration and are supported by a strong organisation. We have annual sales of SEK 14.7 billion and about 7,000 dedicated employees at more than 100 locations in the Nordic region. Read more at

About Assemblin Caverion Group (from 1 April 2024)
Assemblin Caverion Group is a leading northern European technical service and installation company. The Group employs some 21,500 skilled professionals in nine countries, sharing the passion for smart and sustainable solutions. We deliver installations, technical services and solutions along the full lifecycle of the built environment to support our customers and their increasing demand for energy efficiency, sustainability, and automation for buildings, infrastructure and industrial sites. Assemblin Caverion Group was formed in April 2024 through the combination of Assemblin Group and Caverion Corporation. Our combined revenue amounts to approx. SEK 43 billion/EUR 3.8 billion​. Read more at