Letter V

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VAV Variable Air Volume - hood motor speed varies or damper action provides for variable cfms pulled, depending usually on face opening size or sash height.
VDT Video Display Terminal
VEO Visible Emissions Observation
VHAP Volatile Hazardous Air Pollutant
VOC Volatile Organic Compound
VPP Voluntary Protection Program - An OSHA program which promotes excellence in workplace safety and health programs in exchange for limitations on scheduled inspections by OSHA.