Paitilla and Punta Paitilla form an established area facing the bay, with residential and office towers and several medical centers built in different periods. Some buildings have many years of continuous operation.
That shows in the ductwork: every building carries its own maintenance history, and a system with many years of service has had more time to hold dust. In Panama that dust turns damp with the ambient humidity and the unit’s condensation, and by the bay the salty air adds to it. In medical centers, in addition, the work is coordinated with each center’s protocol and technical team. That is why each case is looked at separately. The area is about 5 km by road from the Climatiza office, in an approximate calculation.
Data point: At the Tocumen station the mean relative humidity drops to 64.9% in March, the least humid month, and rises to 82.4% in October (ETESA, 1977 to 2010, in Spanish). The EPA recommends keeping indoor air below 60%.