Comfort problems and energy losses at shop entrances - field investigations and numerical simulations.

In order to give some guidance for the optimization of shop entrances regarding comfort and energy savings, a project was launched by the City of Zurich. The project covers field investigations in 12 shops with different entrance types, and analytical and numerical investigations (CFD)for complementary results. The emphasis of this work was on the interaction between the situation at the entrance for different technical local solutions with other factors of importance like building ventilation, building tightness and combination with other entrances. As a main result for the practitioner, a lot of recommendations can be drawn from these investigations and will also serve as the basis for governmental guidelines.