What are the requirements for the exhaust system of the biosafety cabinet

Exhaust mode of the biosafety cabinet: directly through the filter of the safety cabinet to the outside of the building.
The filter can be installed in the pressure exhaust system of the full-exhaust biosafety cabinet or in the exhaust system of the building.

The exhaust system shall be set up in accordance with the following provisions.

1. Exhaust air and supply air are interlocked, exhaust air is opened before supply air, and closed after supply air.
2. The exhaust pipe of the biosafety laboratory room can double as the exhaust pipe of the biosafety cabinet.
3, the exhaust system should be able to ensure that the biosafety cabinet relative to the room where it is negative pressure.
4. Biosafety laboratories shall not use safety cabinets or other negative pressure isolation devices as room exhaust vents.
5. The exhaust air of Class II B1, B2 and Ⅲ biosafety cabinets is directly connected with the exhaust system.