Air Containment Air arrives into each room through ceiling-mounted, high-efficiency particulate (HEPA) filters while all departing air leaves each room via low-level HEPA filters. The rooms have been tested with air pressure differentials of over 100 Pascals to ensure they are leak-free at every point. Doors are sealed when closed to further prevent air leakage.

Double Barriers Further safety is assured through the use of biological safety cabinets within these clean rooms, which further filter incoming and exiting air with their own HEPA filters.

Individualised Room Pressure Control Each air supply and departure point has a variable speed fan controlling the amount of air coming in and out of each room. These fans are computer controlled through a building automation service that also records the pressure within each room. This allows a pressure to be set for that room and for that pressure to be maintained - even as doors are opened.

Positive and Negative Pressure Control Further safety is built in with the use of pressure gradients. When carrying out procedures that require high degrees of containment, the pressures can be sequenced so that there is a large negative pressure within the clean room ensuring all air flow is towards the clean room. The facility can operate in both modes simultaneously, with two clean rooms operating in positive mode and the other two operating in negative pressure mode.

Access Control The facilities are located in an area not accessible to patients or visitors. Entry to the main laboratory zone requires an appropriately-coded card, while access to each pair of clean rooms is further restricted by a digital combination lock. Entry and exit doors are electronically interlocked to prevent both doors and either entry or exit anterooms from being simultaneously opened.