What is the minimum face velocity required for pre-existing lab hoods?

The minimum face velocity required for pre-existing lab hoods is established to ensure effective ventilation and containment of hazardous fumes, vapors, and particles. A face velocity of 75 feet per minute is generally accepted as the minimum standard for maintaining safe working conditions in laboratory environments. This velocity helps provide adequate airflow into the hood, thus preventing contaminants from escaping into the laboratory space and minimizing exposure to laboratory personnel.

Using this standard face velocity ensures that the hood functions effectively while also considering energy efficiency and the overall performance of the existing hoods. Following industry guidelines is critical for both safety and compliance with regulatory standards in laboratory settings, emphasizing the importance of proper hood design and operation.