OEC partner Pauat was responsible for the refurbishment of the historic industrial site of OEC partner Fronius in Wels. An old brick building was renovated using passive building components and a new 3-floor building was constructed. The new complex features passive building standard insulation, ventilation systems with heat recovery, a heat pump and passive cooling. The heating demand of the ancient brick building was reduced from 225 kWh/m²a to max. 100 kWh/m²a. In 2012, the "Active Energy Tower" was set on top of the existing building. PV modules are integrated in its ventilated glass facade.

Pauat, an innovative architectural company, renovated a townhouse which they are now using as their new office. The energy autonomous building meets the passive building standard, has 18 m² vacuum tube collectors, 3 x 4,7 kWp photovoltaics and ground water use for cooling. The project was supported by the regional government of Upper Austria.