Laboratory Ventilation System

Informations for Laboratory Ventilation System

The laboratory ventilation system is an important part of the laboratory system. It is a system composed of three parts: exhaust, dilution, and filtration. It is mainly used to dissipate the vaporized or suspended harmful substances released in the laboratory. This system reduces the chances of laboratory personnel being exposed to dangerous substances and keeps the laboratory clean and safe.

The exhaust system is designed to draw air from the laboratory and discharge it to the outdoor environment. The dilution system is designed to dilute the harmful substances in the laboratory atmosphere and reduce their concentration. Filters are usually mounted in the ventilation system to absorb particulate matter in the air and chemicals in the aerosol form.

The best laboratory ventilation system is one that is regularly monitored and maintained to ensure proper working conditions. Proper air flow and air speed should be maintained in all parts of the lab. The filter should be changed in a timely manner to prevent contamination. A regular maintenance schedule should be followed and the laboratory equipment regularly checked.

Under normal conditions, 6-12 times every hour's room air changes are considered appropriate. When there is analysis equipment which is likely to produce high heat load or there is large local exhaust air in the room, there will be a need to increase in volume.

The laboratory should adopt 100% full fresh air system, the central air supply unit and compensate laboratory exhaust demand. In order to ensure the safety of the staff, keep the distanse of discharge point and flat roof at least 3 meters (ten feet) or even higher in order to exhaust emissions and effectively diluted. The specific choice should be calculated to confirm.

In any case, air should always flow from the office, the corridor and auxiliary areas into the lab area. And all chemical laboratory exhaust gas should be directly discharged to the outside, and mustn't be recycled. Therefore, unless chemical laboratory is required to clean itself, its relative to other space within a building maintains negative pressure of the camp.

Experiment indoor airflow should be from low risk areas to high risk areas. Generally speaking, it should keep the flow of gas 47 liters per second between the above area (170 cubic meters per hour). Office areas in a laboratory should always maintain a positive pressure relative to the corridor and laboratory.

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