Proper laboratory environments are critical for both the safety of the technicians in the labs and personnel outside the labs. To make sure no toxic airflow escapes, negative laboratory pressures are required and need to operate that way under all conditions.
Fume hoods need proper face velocities at all times, regardless of sash positions, to capture and exhaust chemicals for the safety of personnel working near the fume hoods.
Laboratory performance analysis can guarantee proper airflow performance of laboratories and fume hoods. Certifications of fume hood monitors will also protect owners from legal challenges brought by employees who are concerned about their safety at the workplace.