For the project at Quellenstraße 13a in 2340 Mödling, an innovative new residential complex consisting of 4 timber structures with a total of 47 residential units is being built. Exterior walls in wood frame construction as well as ceilings and interior walls in solid wood construction form the basis of the sustainability concept. The careful selection of the insulation and the insulation thickness represent an excellent balance between material and energy savings and energy use in the production of building materials.

A key factor influencing the sustainability of a building – in addition to the thermal quality of the shell – is the building services. Heat pumps with depth probes and photovoltaic systems on the roofs are used in the new villas in Mödling’s Neusiedlerviertel. The design of the building services according to the standard provides great security; for example, standard outside temperatures are used and internal as well as solar gains are not taken into account. A thermal dynamic simulation using IDA ICE can be used to optimize both the heat pump and the depth and number of the boreholes. Location-related weather data is used, but also orientation and the surrounding shading are considered.

For this construction project, a thermal dynamic simulation was used to determine a heating load that was approx. 40% lower than the standard heating load calculation, while at the same time proving that the control setpoints were complied with. In addition to the resources saved in the production of the heat pump, economic advantages are also a strong argument for optimized planning using thermal dynamic simulation.