Surfaces sampled
42 ventilation and air conditioning systems and the associated surfaces of the connected indoor rooms were examined
Ventilation andair conditioning systems
Equipment chambers, filters and built-in parts
Ductsystems
Fresh air, supply air, recirculated air and exhaust air ducts
Filters
G4, F5, F7, F9, Hepa 13 and supply air outlets
Indoor rooms
Room surfaces, air and commodities
Functional areas examined
Open-plan offices, operating theatres, intensive care units, production rooms, ambulance stations, recreation rooms, corridors and ancillary rooms, laboratory areas, packaging and storage areas, indoor rooms air and surfaces.
Over 3,500 microbiological samples were taken during daily operations.
The investigations were partly carried out by the operator in-house or by several independent external hygiene institutions.
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