In addition to sustainable construction, comfort also played a major role. A geothermal heat pump provides energy for the underfloor heating and the concrete core activation in the ceiling, ensuring pleasant room temperatures all year round. The centerpiece, however, is the well-thought-out ventilation concept: each of the apartments, ranging from 75 to 120 m², has a modern comfort ventilation system with integrated heat and moisture recovery from within the apartment. 

"The units are not located in the individual apartments but are collected under the roof", explains Theiss, listing several advantages of this solution: “For maintenance work, you don’t have to enter the apartments; repairs or filter changes can be easily done in the technical center. The fire dampers, which must always be accessible, are also located there.” Another architectural advantage: unlike systems installed in individual apartments, no ventilation openings are required on the facade.

As is common in passive house construction, the ducts – including the main, supply, and exhaust air ducts to the apartments – were laid through the concrete walls. This ensures not only fire protection when passing through foreign floors but also virtually silent operation. The residents hardly notice the ventilation – they only notice the good air. 

"Since the apartments were occupied, there has only been positive feedback", confirms Armin Theiss from the executing construction company. “We have been working with Hoval for a long time and are convinced of the durable and high-quality products. The HomeVent ventilation system particularly impressed with the rotary heat exchanger and efficient moisture recovery,” he explains his decision for Hoval systems.