Ventilation F. Ventilation F1.
General ventilation provides only modest protection against toxic gases, aerosols, vapors and dusts.
General ventilation will not be used for protection against toxins. Local Local ventilation will be used to prevent harmful fumes, mists, dusts, gases, and vapors from entering the laboratory air. Your best protection is the chemical fume hood, if used properly. Fume hoods will be inspected and validated annually by a contractor. Fume hoods will have a face velocity of at least 100 linear feet per minute with the sash in the fully opened position or at the sash catch position.