energy

Previously we wrote about “damp closed or damp tight buildings” and the fact that nowadays almost all utility buildings (offices, hospitals, airports, schools, …) are damp closed, i.e. moisture can not leave the building via the roof or the walls, or even via windows as often such building have no openable windows. Instead all air is refreshed via an air conditioning system that pre-heats incoming air using heat exchangers and heat pumps.