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Chemical Fume Hood. Chemical Fume Hood. A type of local ventilation device that is designed to limit the user's exposure to hazardous or noxious fumes, vapors or dusts. Components of a Chemical Fume Hood. Duct Work. Light. Air Flow Monitor. Utilities. Sash. Air Foil.
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Chemical Fume Hood • A type of local ventilation device that is designed to limit the user's exposure to hazardous or noxious fumes, vapors or dusts.
Components of a Chemical Fume Hood Duct Work Light Air Flow Monitor Utilities Sash Air Foil
Components of a Chemical Fume Hood • Sash • Adjustable – position low enough to allow arms free movement to perform work • Safety glass – protect against splashes and minor impacts • Air Foil • Do not block, it provides air flow across the bottom of the fume hood
Components of a Chemical Fume Hood • Air Flow Monitor- • Monitors velocity of air in the fume hood and warns of unsafe conditions (low flow or high sash) • Ductwork- • Air is exhausted out of the lab through ductwork • Utilities- • Air, gas, water, or vacuum may be available
Chemical Fume Hood Safe Work Practices • Consult chemical MSDS • Check the air flow monitor reading • Operate sash at proper height • Do not use as a storage cabinet • Wear appropriate PPE • Help PSU conserve energy
HIGH ENERGY DEMAND • Fume hoods exhaust large volumes of air • Exhausted air must be replaced by fresh air from outside • Electricity used to cool air (summer), power fans • Natural gas used to heat air (winter) • Humidity adjustment may require both cooling and heating • Hoods: lower sash = less air exhausted = less energy costs and greenhouse gas emissions