A concrete pile acting as an energy collector acts as a load-transferring element and a heat exchanger in the concrete pile foundation, enabling heating, cooling and heat storage for the building.

During the manufacturing phase, a heat transfer pipeline is installed in the pile. This enables the heat transfer fluid to circulate inside the energy pile, transferring heat either from the ground or into the ground.

Tekres Pile Joint enables extending the concrete pile according to needs.

During piling, the energy pile can be easily and safely extended with the help of Tekres Pile Joint which locks and tightens itself.

The Earth's crust is full of renewable energy, and it is the world's largest battery. Heat can also be stored there.

Concrete piles, which act as energy collectors, connect the building technology to the ground energy. The ground temperature stabilizes at a depth of ca. 15 meters to the average of the annual temperature variation of the ground surface and is varying between 6–8 °C in Southern Finland and 2–3 °C in Northern Finland.

During the heating season, geothermal energy is used to heat the building with energy piles and a geothermal heat pump. When the temperature of the heat transferring fluid is lower than the temperature of the ground, heat transfers from the ground to the heat transfer fluid, heating it during the flow. The heat transfer fluid heated during the flow enables heating of the building and domestic hot water with a geothermal heat pump.

In the summer, ground cooling is used to cool the building. Cooling can be done with a system suitable for a geothermal heat pump, such as a fan converter.

In summer, the heat contained in the heat transfer fluid is transferred to the ground, so that the fluid cools down when it returns to the fan converter. This solution enables energy efficient cooling during the entire cooling season and heat storage.

Heat is stored in the ground both from the radiation of the sun and from the thermal energy of the building's indoor air. Heat storage stabilizes thermal conditions in the ground by returning heat back to the ground, which is utilized later in the upcoming heating season.