Björn and Katarina are launching Degasser .
Having our manufacturing operations nearby allows us to integrate quality, development, and support in a way that makes a difference in the long run.
Lena disconnects the exhaust control unit with a steady hand.
Dan wraps the couplings with flax—a process that requires experience, precision, and a keen sense of touch. For us, it’s a natural part of our broader commitment to quality.
Plumber, Heating & Bathrooms, Hamar
Stina is finalizing the manual in preparation for delivery—for us, clear documentation is part of the product.
Thomas from the production department stands in front of a fully assembled Degasser , packed and ready for shipment to Norway.
The exhaust system is one of our most popular products. Just like our pressure-maintaining units, combination units, and filter stations, it is manufactured in Töcksfors.
To the exhaustSee all products
Håkan Lennartsson had extensive experience in the HVAC industry when he decided to strike out on his own in 2006. In Töcksfors, he took over a district heating plant and began building something step by step, with his sights set on more sustainable energy solutions.
A few years later, in 2012, he founded HL Hydronics—then known as HL VVS AB—and laid the foundation for what is now Hydrun.
It started on a small scale, but with a clear vision: to develop solutions that make hydronic more reliable, energy-efficient, and sustainable over time.
The idea took off, and the company grew. First in Sweden, then in Norway, and eventually across Europe. When Björn Lennartsson joined the company in 2016, it also became clear that the expertise and dedication would live on in the next generation.
In 2017, everything changed when Håkan passed away. Björn then took over the company, determined to preserve what his father had built while continuing to move forward.
Since then, the business has grown to include new products, new markets, and new contexts—but it remains rooted in craftsmanship, care, and a long-term perspective. Today, Håkan’s vision lives on at Hydrun. Not only in the products we build, but also in the way we work—closely with our customers, closely with our production, and with a strong belief that quality, expertise, and reliability make a real difference.
Retain energy
Bevar energien
Säilytä energia
Retain energy
Préserver l’énergie
From Töcksfors to Europe, products that keep the heat (or cold) in the system.
support@hydrun.se
sales@hydrun.se
+46 (0)573-21 630
Hydrun AB
att: HL Hydronics
Bögatan 40
672 41 Töcksfors
Sweden
