The effectiveness of a low-energy strategy can best be measured by the resulting reduction in operating costs.
Our projects are accompanied by research after completion so as to assess actual energy needs during the first years of use.

The project “Solar Housing Plabutsch” in Graz/Austria, a low-energy building constructed with state funding, was evaluated by means of a research project for three years after completion.
Empirical measurements pegged heating oil needs at only 5 l/m²a, even though outside temperatures dropped to –13°C in the winter.

Energy optimization strategies can equally be applied to reducing cooling load.
For the project “Holiday Inn Hotel“ in Amman/Jordan, the zones with the highest activity levels were planned within an artificial, grass-covered hill which serves as storage mass.
The facades of the guestroom floors, situated above the hill, were designed on the basis of energy simulations.
As a result, the hotel’s operating costs are as much as 50% lower than those of comparable buildings.