In zones separated by doors with many entrances and exits, it is crucial in terms of energy
consumption to protect the conditioned air in the indoor environment from the e®ects of
outside air. The increase in door dimensions and opening frequency make this e®ect even more
evident. Various methods are used to prevent leakage of outside air into the indoor environment.
In this study, we investigated the e®ects of using air curtains on energy consumption
during the cooling season in a factory building. The door width and height in this building,
which has a high story height, were also large. These 26 doors must remain open all the time
because of the production process. With a transient model developed on Transient System
Simulation Tool (TRNSYS) coupled with Contaminant Transport Analysis Software (CONTAM),
we showed the e®ects of using the air curtains in di®erent climate conditions. As a
result, we demonstrated that using air curtains will provide great savings, especially in cities
with high cooling requirements.