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Laboratory negative pressure control system
Room negative pressure control solution
improve air circulation Air entering the laboratory from non laboratory environmental areas should be directly discharged from the outside of the laboratory building
-Occupational Safety and Health Administration (OSHA)
Under any conditions, the air entering the laboratory area should come from areas such as office areas, corridors, etc
-Prudent Practices
In the process of indoor pressure control in the laboratory, maintaining a specific pressure difference between indoor and outdoor is not our ultimate goal,
What we really need to achieve is to maintain a constant flow of air at a certain speed when circulating indoors and outdoors“
-American National Standards Institute (ANSI)/American Industrial Hygiene Association (AIHA) Z9.5
1. Pressure difference control method:
The laboratory should always maintain negative pressure
Ensure that there is always a certain pressure difference between the laboratory and the corridor
2. Residual air control method:
As shown in the example diagram, ensure that the residual air volume is 10% * total exhaust air volume
3. Compensation control method:
Residual air volume control+pressure difference control
Control through residual air flow, adjust the residual air flow value when the pressure difference deviates