Sustainable future
A major step forward in the heat transition
WarmtelinQ and contractors A.Hak and Hanab Pipelines & Industry are signing the contract today for the construction of the heat transport pipeline between Rijswijk and Leiden. The construction of this route marks a significant step forward in the heat transition in this part of South Holland.

The Rijswijk – Leiden route will be approximately 25 kilometers long and connects to the already constructed Vlaardingen – The Hague section at Rijswijk. From the Prinses Beatrixlaan in Rijswijk, the route largely runs along the A4 towards Leiden. The project includes a heat transfer station and a peak & backup installation near Leiden.
Sustainable future
The Netherlands is working towards a climate-neutral future by 2050. WarmtelinQ makes a significant contribution with an open heat transport network in South Holland. Multiple (sustainable) sources can connect to this network. This is already happening with residual heat from the Port of Rotterdam. Heat that would otherwise be lost is now being reused to warm approximately 120,000 homes and businesses. This means less natural gas consumption and an expected reduction of 180,000 tons of CO₂ per year.
Planning and execution
WarmtelinQ expects to start work at multiple locations along the route next spring. The construction method varies by location: we drill under the A4, A12, A13, and A44 highways and under the ProRail and RandstadRail tracks to avoid disrupting traffic. Along the A4 and the Corbulo tunnel, in the peat meadow area of Stompwijk and the Oostvlietpolder, the ground is soft. Therefore, we will partially plow in the pipeline here. At several other locations, we will install the pipeline through open excavation. This way, we minimize disruption to the surrounding area as much as possible.
Inge Aardse, Director of Heat Transport at Gasunie: “It’s great news that today we’re further shaping the heat transition in South Holland. The more sustainable heat we use in the province, the less gas we burn and the less CO₂ we emit. WarmtelinQ is proud to contribute to greater sustainability.”
Tako Keja, Project Director WarmtelinQ: “The heat transport pipelines that WarmtelinQ will construct together with A.Hak and Hanab between Rijswijk and Leiden enable the completion of the heat transition in this part of the Netherlands. This is a unique story when it comes to heat. And the collaboration between WarmtelinQ, A.Hak and Hanab Pipelines & Industry in this field is a wonderful step in the right direction!”
Peter Veermeer, Director of A.Hak Pipeline Construction: “At A.Hak, we are proud to make a warm contribution to the energy transition through this project.”
Guus de Vries, Director Hanab Pipelines & Industry: “We are proud that we can contribute our knowledge and experience to the development of a sustainable energy infrastructure for the future.”
Next steps and environment
The signing follows the preliminary order that WarmtelinQ issued to the contractors earlier this year. This included the development of planning, work plans, and permit applications.
Once the detailed planning for each location is ready, WarmtelinQ will inform residents and businesses about the start of the work and measures to minimize disruption.
Through the BouwApp interested parties can follow the project. This app is free to download from the Play Store or App Store.


