ADA — Americans with Disabilities Act

ADAG — Americans with Disabilities Act Guidelines

Air Foil — Streamlined member at the hood opening designed to improve air flow into the hood

Air Volume — Rate of air flow, expressed in cubic feet per minute (CFM)

ASHRAE — American Society of Heating, Refrigerating and Air Conditioning Engineers, a professional group that sets industry accepted standards for fume hood testing procedures

Auxiliary Air — Supply or make-up air administered externally to the front of the hood to reduce room air consumption

Baffle — Panels located in front of the hoods interior back panel that control the pattern of the air moving through the hood

Bench-Type — Type of fume hood designed to rest atop a pedestal or base cabinets

Blower — Air moving device (fan) consisting of motor, impeller and scroll

Bypass — Compensating opening that allows for unobstructed airflow that helps maintain constant volume exhaust from fume hood, regardless of sash position

Canopy Hood — Ventilating device typically suspended from the ceiling used to dissipate heat, water vapor, odors, etc.

CFM — Cubic Feet per Minute: unit of air volume measurement

Combination Sash — Horizontal sliding safety glass panels in a vertically rising frame, (Sash)

Constant Volume — Type of fume hood exhaust system that exhausts the same volume of air regardless of the sashes position

Containment — Function of fume hood to control fumes within the hoods interior compartment

Damper — A device installed within the duct to control the volume of air passing through

Demonstration Hood — Fume hood accessible from two sides with a viewing window in one end used for demonstration purposes

Duct — Round, square, or rectangular tube used to encapsulate air

Duct Velocity — Speed of air moving through the duct, measured in (FPM)

Exhaust Collar — Place where the exhaust duct connects to the fume hood and passage for all exhausted air from hood

Exhaust Volume — The quantity of air exhausted by the fume hood; the volume of air passing through the duct measured in CFM to maintain a determined face velocity

Face Velocity — Speed of air moving into fume hood through the hoods face opening (sash), measured in (FPM)

FPM — Feet Per Minute; measurement of air velocity

Fume Hood — Five sided ventilated enclosure used in laboratories to control, collect, and exhaust contaminants

Liner — Fume hood interior sides, back, top, lintel, and baffles

Lintel — Portion of fume hood front located above the hoods face opening (sash)

Louvers — Slit-like openings punched into hoods front panels

Magnehelic — Type of gauge suitable for measuring low air pressure

Manometer — Measures air pressure differential

NFPA — National Fire Protection Association

Restricted Bypass Fume Hood — Fume hood operating type, Designed with limited bypass area; commonly used in conjunction with VAV exhaust systems and restricted sash openings

Sash — Sliding safety glass panel set in fume hood face that protects the fume hood operator from exposure to chemicals and fumes inside the hood

Service Fitting - Faucets and gas valves mounted to the fume hood

Static Pressure — Air pressure, or resistance, in the hood or duct, expressed in inches of water

Superstructure — Portion of the fume hood supported by the base cabinets, pedestals, and the work surface or the floor

Total Pressure — The sum of velocity pressure and static pressure as measured in duct

Variable Air Volume — Type of fume hood exhaust system that typically maintains a constant face velocity by adjusting the blower motor speed or the use of a balance damper in response to changes in the sash position

Velocity — speed of air, measured in Feet Per Minute (FPM)

Walk-In — Tall in height type of fume hood, designed for tall and large equipment and apparatus

Water Gauge — Measuring device using the weight of a column of water, calibrated in inches

Welding Station — A type of modular unit designed to allow ventilation and filtration to keep the welder from inhaling fumes

Work Surface — Top material typically epoxy resin and stainless steel: area in the fume hood where apparatus rests and where work takes place