Assemblin H&S acquires reputable firm JW Rörservice

Assemblin H&S has acquired the heating and sanitation company J. Wretvall Rörservice AB (JW Rörservice) which employs 31 personnel in the Stockholm region across a range of specialisms.


JW Rörservice was founded in 1997 and operates across the greater Stockholm area. The company has annual sales of some SEK 90 million, and primarily provides heating and sanitation installations as project assignments, but it also has a small but dedicated service team in house. JW Rörservice has specialists in areas including energy technology, licensed welding (tig, black and orbital), as well as medical gases. The firm has a diversified customer portfolio comprising primarily small and medium-sized construction and real estate companies, as well as public sector operators.

“We are delighted to be making this acquisition. JW Rörservice is a high quality, innovative company with the ability to participate in every stage of the construction process. We are impressed by their tremendous focus on quality, leadership and high levels of expertise. JW Rörservice will be a great match to our Stockholm operations which we restructured during 2020 in order to better service local demand,” says Andreas Aristiadis, President and Business Area Manager for Assemblin H&S. 

“Our philosophy at JW Rörservice is based on expertise, commitment and group well-being, all of which have secured high levels of customer confidence in us. We are very proud of this legacy. As part of a generational shift in the business, we were eager to find new ownership. We have been impressed by Assemblin’s professional structure and positive culture, while also noting the genuine commitment of its leadership team,” says Mårten Eriksson, President of JW Rörservice.

For more information about JW Rörservice, please visit

For more information, contact:

Andreas Aristiadis, President of Assemblin H&S,, +46 10 475 20 12

Mårten Eriksson, President of JW Rörservice,, +46 8 532 595 43

Åsvor Brynnel, Head of Communications and Sustainability at Assemblin,, +46 10 475 39 48

About Assemblin

Assemblin is a complete installation and service partner with operations in Sweden, Norway and Finland. We design, install and maintain technical systems for air, water and energy. Our vision is to create smart and sustainable installations that make buildings work and people feel comfortable. Through close and local partnerships and a strong organisation we make that happen. We have a turnover of SEK 10 billion and approximately 5,900 dedicated employees at around 100 locations in the Nordics. Find out more at