Applicable to the planning, construction and qualification of ventilation and air conditioning (VAC) systems in buildings and rooms used in the health sector, particularly those used for medical examinations, treatments and operations on humans, including any rooms directly connected to such rooms via doors, corridors/hallways, etc. in: - hospitals; - day clinics; - treatment rooms in doctor's offices/surgeries; - operating rooms in outpatient facilities; - dialysis centres; - internal and external medical device sterilization facilities.