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

Utilities

Sash

Duct Work

Air Flow Monitor

Air Foil

Light

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

1. Consult chemical MSDS2. Check the air flow monitor reading3. Operate sash at proper height4. Do not use as a storage cabinet5. Wear appropriate PPE6. Help PSU conserve energy

• 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

HIGH ENERGY DEMAND