Assemblin makes acquisition strengthening its expertise in heat pumps and increasing its market presence north-west of Stockholm

By acquiring Grillby & F100 Rör AB (“GF100”), Assemblin Heating and Sanitation strengthens its presence in the Enköping area. GF100, a niche player in the expansive heat pump segment, has 20 employees and annual sales of approximately SEK 50 million.

With nearly 60 years of history under its belt, GF100 is a reputable company specialised in installing heat pumps for the consumer and property markets, while also maintaining traditional heating and sanitation operations. With offices located in Grillby, GF100 mainly operates in Enköping, Västerås, Uppsala and northern Stockholm.

“GF100 offers superior expertise in heat pumps, for example, an appealing and expanding area, driven in particular by increased demand for renewable energy. With this acquisition, we are continuing to build a stronger base in the Stockholm area. I am very happy to have this opportunity to welcome new employees and customers to the Assemblin family,” says Andreas Aristiadis, Managing Director of Assemblin Heating and Sanitation.

Approximately 65 percent of the company’s sales derive from project operations and 35 percent from service assignments (including heat pump installations). Most projects include a central power plant in the form of a heat pump facility. Each year, the company also installs some 40-50 heat pumps at private residences.

“In our view, we and Assemblin share the same focus on quality, culture and expertise. Being owned by a larger installation company, we gain access to a larger network with which we can exchange resources and experience, benefiting our employees and customers alike,” says Theresa Östman, CEO of GF100.

For further information on GF100, please see

For further information, contact:

Andreas Aristiadis, Managing Director, Assemblin Heating and Sanitation,, +46 10 475 20 12

Theresa Östman, CEO of GF100,, +46 70 667 78 18

Åsvor Brynnel, Head of Communications and Sustainability, Assemblin,, +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 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 10 billion and about 5,900 dedicated employees at more than 100 locations in the Nordic region. Read more at