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Danfoss strengthens Benelux distribution with sale to heat exchangers experts

Thursday, September 11, 2025

Danfoss Plate Heat Exchangers is pleased to announce the sale of SONDEX B.V., based in Purmerend in the Netherlands, to heat exchanger experts Theo Thoen and Hans Ter Velde.

Theo Thoen and Hans Ter Velde will continue the sales and assembly site under the new name, SD Heat Exchangers B.V., taking ownership of all assets previously held by SONDEX B.V., including customer relationships and our premises in Purmerend, the Netherlands.

This sale is part of our strategic initiative to strengthen our distribution network in the Benelux region. With Theo and Hans at the helm, the business is in exceptionally capable hands. We have collaborated with them for many years and have great confidence in their deep industry expertise and understanding of the local market. This transition is fully aligned with our commitment to enhancing local presence and delivering seamless service to customers in the region.

Pierre Hultback, Head of Plate Heat Exchangers Sales at Danfoss

Hans Ter Velde, co-founder of SD Heat Exchangers B.V., shared his vision for the new company:

“We are excited to launch SD Heat Exchangers B.V. and continue providing Danfoss high-quality brazed, gasketed, and welded solutions. Our focus is on maintaining strong relationships with our customers and partners, while driving growth and innovation. We are also committed to ensuring a smooth onboarding process for all employees.”

The transition process will begin immediately and is expected to be completed by the end of the year. Danfoss is confident that this strengthened setup will bring significant benefits to both Danfoss and SD Heat Exchangers B.V., ensuring long-term value for customers in the Benelux market.

About SD Heat Exchangers B.V:

Located in Purmerend in the Netherlands, SD Heat Exchangers B.V. is the new name of former Sondex B.V., the Netherlands.

This name change reflects our growing role as a partner in the Benelux countries. We supply heat exchangers but also provide the flexibility, innovation, and customer focus needed to meet tomorrow's challenges. Our relationship with Danfoss remains as strong as ever. As the Danfoss official assembly and authorized distributor partner, we combine global expertise with local responsiveness. Going forward, our customers can expect the same team, quick delivery times from our Purmerend facility, and service that goes beyond expectations. 

For further information please contact:

Communications Advisor Trine Kiar + 45 51 71 83 40

Read more about Danfoss plate heat exchangers