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Design calculations

Correct design ensures the most optimal and the most economical solution as well as savings on operation and maintenance in the long run.
When designing district heating systems, many factors must be taken into account if the systems are to be economical and provide consumers with reliable energy supplies. Such systems should therefore ideally be dimensioned by consulting engineers using complex design software.

If you need to design a smaller project or a distribution network, you can use our online calculation tool isocalc, which can provide guidelines for design of district heating piping. In isocalc, you can enter your calculations and the conditions applying to your project.

Please note that the tables in isocalc are for guidance purposes only. Designing district heating piping by means of a tool should be considered as informative only and should always be verified by a consulting engineer.

isoplus accepts neither legal nor technical liability for design calculations based on the tabulated data contained in isocalc.

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Other isoplus services


Efficient planning ensures optimal project implementation and reliable energy supply systems.

Installation of joints

isoplus has its own service department with about 20 specially trained and certified fitters, who can help with joint installation and installation of leak detection systems – in large-scale as well as small projects.

Installation of leak detection systems

isoplus’ project employees and service department offer a number of services related to the installation of new leak detection systems as well as renovation of the existing ones.

Turnkey solutions

With isoplus as your turnkey partner, your entire project is handled by one company – this ensures a secure and clear process.

Training & certification

At the isoplus training centre we can arrange courses on installation and quality assurance of pre-insulated piping systems as well as joint installation.