What is the face velocity range for new lab hood requirements?

The face velocity range for new lab hood requirements being 80-120 feet per minute ensures effective capture of hazardous vapors, gases, and fumes while maintaining a balance that does not strain the ventilation system. This range is established to optimize safety and efficiency, allowing sufficient air movement to protect personnel from exposure to harmful substances without excessive airflow that could cause discomfort or waste energy.

Setting the face velocity within this range helps to ensure that the air is moving rapidly enough to entrain and withdraw hazardous materials from the workspace effectively. Additionally, maintaining this velocity allows the laboratory to achieve proper performance while facilitating adequate containment. When face velocities deviate significantly from this recommended range, both safety and energy efficiency can be compromised, resulting in increased risk during laboratory operations.