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Complete prefabricated district networks on coil
Flexanet prefabricated networks on coil
Flexanet prefabricated networks on coil
Flexanet prefabricated networks on coil
Flexanet prefabricated networks on coil

Flexanet district networks on coil are our strikingly efficient, high-speed solutions for district heating, cooling and potable water networks – both for newbuild and renovation projects. A fully prefabricated Flexalen network with readily attached house connections is the all-inclusive pre-insulated network solution that can be swiftly rolled out to connect an entire street in just one day.

Turnkey district heating – for minimum risk and maximum lifetime

What’s usually the most complicated and time-consuming part of installing district networks is an easy and reliable fix with Flexanet district networks on coil. 60-70% of the connections are made in the controlled factory environment. The connections are readily attached to the main line, and carefully pressure tested. This means risk, maintenance and overhead costs are kept to an absolute minimum.

At full speed ahead with Street in a Day

Flexanet prefabricated networks ensure maximum speed and reliability in the implementation of district heating networks. They can be rolled out from the coil directly into to the trench, allowing instant connections to the houses. The entire installation – including trenching, laying, welding and closing – can be done in just a single day, ensuring minimal disturbance for residents, businesses and the built environment.

We’ve been breaking records in various district heating projects across the globe. Here's what we did in Hengelo, the Netherlands:

Optimal material efficiency

Flexanet pre-insulated networks on coil are fully customized in advance to the project design with just-in-time delivery, which means on-site stock and material waste are kept to an absolute minimum. The flexibility and homogeneity of Flexalen further boosts the ease, speed and material use in welding and installation.


Flexanet pre-insulated networks on coil are made-to-order. Contact our experts for tailored advice, network design and on-site support.

  • Health

    Produced without (H)CFC
    Complies to REACH
    Complies to VOC (Volatile Organic Components)

  • Specificities

    High flexibility

    Fully prefabricated and factory tested

    One system for heating, cooling and potable application

    Light weight

  • Service temperature

    Wide temperature range

    Minimum -15°C

    Maximum 95°C

  • Pressure rating




  • Additional information

    For more details contact Thermaflex or download the technical datasheet!

  • Availabilities

    Versions: single pipes

    PB-diameters: PB16 to PB75
    Outer jacket: Ø90 minimum, maximum Ø160
    Outer casing diameter house connection: Ø90 (PB16 to PB40)
    Maximum length: 54 meters based on continuous pipe length.
    Minimum / maximum distance between the branches:
    Ø160: min 3 m, max 6 meters
    Ø125 and Ø90: min 2 meters, max 6 meters


  Letter of Recommendation by Freund GmbH (German) PDF 358 KB Preview Download Mail

This letter of recommendation was issued by Freund GmbH (austrian installation company) for the Street in a day project in Wörgl.

  Pressure drop PB-pipes PDF 44 KB Preview Download Mail

Pressure drop PB-pipes

Brochures Catalogues

  Flexalen Product Guide PDF 4623 KB Preview Download Mail

The Flexalen Product Guide offers all system, application & technical specifications for all Flexalen product ranges.

  FAQs Polybutene PDF 2492 KB Preview Download Mail

Here you will find answers according the frequently asked quastions about Polybutene.

  Successful in the past - prepared for the future (PBPSA) PDF 1619 KB Preview Download Mail

This brochure is giving an introduction to Polybutene including a review of the performance of Polybutene pressure piping systems in meeting the needs of sustainable building regulations.

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