Airflows and energy losses through revolving doors also occur as a result of leakages past the seals of the door. Leakages are common to any type of opening in an otherwise closed space, but have been investigated in the context of revolving doors by Zmeureanu et al.[21] and by Schutrum et al.[15] before that. The first study concluded that to avoid significant leakages, the seals of the doors should be maintained and periodically replaced if needed.