Z.A.C. Berthelot, Lyon, France
Detailed sun studies have been conducted to investigate the amount of solar radiation received by the facades. Moreover, the level of daylight has been predicted for all major rooms of the apartments.
As a consequence, moveable external shading devices have been designed and positioned carefully. Hence overheating in summer is drastically reduced and cooling / air conditioning is not required. The shading devices are designed in such a way, that natural cross ventilation is fully possible. In addition, large balconies create a desirable semi-outdoor space.
Several strategies to minimize energy consumption have been investigated by dynamic thermal simulations. Baseline was a French standard building.
Based on the results of this study the thermal quality of the building envelope has been enhanced above the current French standard. The facades have insulated double glass units with low-e coating in the cavity and an external insulation of the massive walls. The bathrooms are equipped with an exhaust ventilation system and the facades bear small fresh air intake units.
This kind of investment turned out to be reasonable and cost-effective. A higher quality of the building has be reached, achieving a better vendibility on the housing market.