In accordance with 29 CFR 1910.1450, the chemical fume hood shall be designed to protect laboratory and maintenance employees, ensuring that hazardous chemical vapors originating from laboratory operations are exhausted. The use of variable air volume systems is preferred and can be found across UK campus. Additional requirements supported by ASHRAE and AIHA/ANSI standards include:
- An average air capture velocity of 100 feet per minute (FPM) at the sash.
- OHS has categories of each airflow range to better help define safety and energy concerns.
- Working sash heights can be set between 12" and 18" height. Factors that depend on height adjustment:
- The type of experiments being performed in the fume hood
- The average height of the lab personnel (e.g., a 12" sash may not be most appropriate ergonomically for individuals well above 6' in height.
- The ventilation must be in compliance with the chemicals being executed in the fume hood.
- i.e., 72% perchloric acid being heated in a fume hood MUST have a compatible fume hood, compatible ductwork material, AND a washdown system installed.