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Flexalen® for low temperature heating network

Thermaflex Enables Energy Transition in Nieuwe Wipwei, Roosendaal

Flexalen piping system transformed Roosendaal’s heating infrastructure by repurposing waste heat from the Suez waste disposal plant.

De Nieuwe Wipwei Project

Situated in the vibrant community of Roosendaal, Netherlands, the low temperature district heating project is strategically located to serve local residents and businesses with sustainable heating solutions, fostering a more resilient and environmentally conscious neighborhood.

Project Goals

Aligned with the Smart Climate Grid initiative, the project in Roosendal aimed to install a fourth-generation district heating using recycled heat from a waste processing plant to secure sustainable comfort for local residents. This initiative also has environmental goals such as carbon emissions reduction, energy efficiency enhancement, and sustainable infrastructure development by repurposing waste heat from the Suez waste disposal plant to provide sustainable heating, thereby reducing reliance on gas and advancing the city’s sustainability goals.


The Cradle to Cradle Certified® Flexalen piping system made from Polybutene-1 piping, delivered with plug-and-play Flexalink house connections proved to be the ideal solution for this project. Thermaflex’s Flexalen pipe system has impressive durability and recyclability, aligning perfectly with the project’s sustainability objectives. The solution helps to address the challenge of providing sustainable heating by efficiently utilizing waste heat, reducing maintenance needs, and ensuring long-term reliability.

Project Process

Together with BAM Infra Nederland and the municipal energy provider of Roosendaal, Thermaflex has expanded the innovative, low temperature heating network with the connection of the Nieuwe Wipwei district. This is a big next step in realizing the city’s sustainability targets.

With an eye on the future, Duurzaam Energiebedrijf Roosendaal (Sustainable Energy Company Roosendaal) took the initiative to implement a Smart Climate Grid for the heat supply of a local college and residential district in 2012. The grid makes use of clean waste heat of 42°C from a local waste processing plant operated by SUEZ – energy that would otherwise be lost.

Already, this has cut the college’s energy bill by 50%. The connection of the new residential quarters to this unique district heating network marks an important milestone: heating individual homes based on the only low temperature district network in the Netherlands. By using low temperature (LT) waste heat, heat loss is significantly lower while ensuring a much higher thermal energy yield. In this way, sustainability and comfort go hand in hand.

In order to minimize disturbance for current residents, the partners took up the challenge to implement the entire network within 3 weeks, while at the same time securing a future-proof solution. This was implemented through a collaboration between Thermaflex and BAM Infra (expert in infrastructure and network installation). The expertise and structured approach by BAM also proved to be highly effective in the rapid installation of a reliable Low Temperature (LT) network, whereby disturbance to the local environment was kept to a minimum.

Results & Benefits

The project promotes sustainability using waste heat and recyclable materials, contributing to long-term environmental benefits. For Roosendaal, this is only a start. Of the 60 MWh waste heat capacity of the processing plant, only 5 MWh has been exploited. The success of this network expansion affirms the potential to expand it in the near future. Not only in the Netherlands, but all over the world waste heat offers a much better alternative to conventional gas-fired heating and is abundantly available globally.

With these types of innovative and highly scalable concepts, Thermaflex and its clients demonstrate that the transition to sustainable energy while assuring optimal levels of comfort at lower energy bills is a challenge that can be easily handled collectively. This project exemplifies a successful integration of sustainability principles into urban infrastructure development, paving the way for a greener and more resilient future for Roosendaal.

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