How it works?
Take a closer look at clever technology behind iSunBuilding
Discover iSun Technology in less than 60 seconds…
Warm in Winter and Cool in Summer
Heating in Winter
Heating energy is absorbed by the solar collectors mounted on the roof and is stored in the ground under the building. Stored energy is used to heat the thermal barrier enveloping the living space during winter periods.
Cooling in Summer
The source of cooling energy is geothermal soil or groundwater. Cool fluid is pumped into the thermal barrier in the summer and coolness ensures that the fluid temperature in thermal barrier tubes is in the range of 20 to 24°C and no further cooling is required.
Thermal Barrier
Pipe registers on the outer walls and plaster over the pipes create that thermal barrier. The Fluid in the thermal barrier is heated by free solar energy stemming from the grounded heat-battery. When temperature in the thermal barrier approaches the internal air temperature, heating is no longer required.
Thermal exploitation explained
Thermal exploitation of the ground is currently a widely applied approach in Germany. In this context, several methods are commonly distinguished:
In all these cases, geothermal heat is used to achieve the required flow temperature for building heating systems, typically with the support of heat pumps.
A breakthrough
One discovery made all the difference
A fundamentally different and significantly more cost-efficient approach was developed by a Luxembourg-based researcher and developer, B.Sc. Eng. and physicist Edmond D. Krecké. His method directly exploits the near-surface temperature of the Earth generated by solar energy, rather than relying on deep geothermal extraction.
It is well known that at a depth of approximately 3 to 4 meters, the ground temperature remains relatively constant throughout the year—independent of atmospheric conditions—at around 9 to 11 °C. This phenomenon is often referred to as the “wine cellar temperature”: in winter, it is perceived as warmth, and in summer as cooling.
In conventional buildings, heating energy must be supplied to compensate for the temperature difference between the outdoor and indoor environment. By utilizing this stable ground temperature, the energy demand required to reach comfortable indoor conditions can be significantly reduced.
It is necessary to add a ventilation system. This must be installed with the high efficiency recuperation. Optional air heater/cooler (DX refrigerant) can be added to the system. It’s purpose would be to help exploiting outdoor air as a renewable energy source, to cover the ventilation losses and even further reheating or cooling functions of the building. It can be also used to dehumidify the air in a high humid areas.
Perfect solution for your home
Benefits of iSunBuilding system:
Let’s Build Your Energy Independent Home Together.
Whether it’s a new build, a remodel, or just an idea — we’re here to help bring it to life. Let’s talk and explore how we can make it happen.