top of page
Frame 279.png


Utilizing return heat is important for energy companies to slow down climate change. The heat from the return pipe can be used to heat buildings connected to the district heating network. The return pipe can also serve as a distribution channel for waste heat between properties that produce waste heat and those that need heat.









The PIP3 triple-pipe solution developed and patented by Iotoi saves costs for energy companies and provides savings for property owners, resulting in a profitable outcome for all parties involved.

Iotoi's PIP3 triple-pipe system is a proven method for:

1) utilizing return heat from district heating for building heating, as well as
2) utilizing the return pipe as a distribution channel for waste heat.

Modern buildings do not require high temperatures from the forward flow pipe of district heating for heating purposes. Properties can be heated using the heat from the return pipe. Iotoi's patented PIP3 triple-pipe system enables the use of return pipe heat for building heating.

In every district heating network, there are properties that are suitable for PIP3 applications based on their conditions and location.

Iotoi conducts a survey for each property in collaboration with the property owner and the district heating company. The survey evaluates the property's suitability for PIP3 applications, its potential for savings, and provides preliminary investment calculations from both the district heating company's and the property owner's perspectives.

If waste heat is generated in the property, thanks to the PIP3 solution, the waste heat can be further distributed through either the return pipe or the forward flow pipe. A PIP3 waste heat site provides the district heating company with new, non-combustion-based heat sources, which reduce the production costs of district heating and decrease the carbon footprint of district heating.




During the survey, preliminary calculations are made regarding the technical and economic suitability of the property as a PIP3 site, from the perspective of both the district heating company and the property owner. The survey assesses factors such as the property's district heating consumption and energy-saving potential, as well as, if applicable, electricity consumption.

Preliminary investment calculations are included in the survey.


Properties with high district heating consumption benefit from the use of the PIP3 solution. PIP3 reduces the heating demand of the forward flow pipe in the district heating network and lowers the temperature of the return pipe. This results in cost savings for the energy company and enhances the network's efficiency. As the energy company benefits from the PIP3 solution, it can sell the heat from the return pipe at a lower price than traditional connections.



Industrial processes generate large amounts of waste heat. As the number of processes increases, so does the need for cooling in properties. With the PIP3 solution, such properties can become waste heat sites, feeding surplus heat back into the district heating network through either the forward flow or return pipe. This solution enables the sale and distribution of waste heat to the energy company's district heating network, bringing economic benefits to the property from the waste heat. Additionally, the solution can include providing cooling for the property

bottom of page