thesafeoperatinglevelsforhoodexhaustsystems.ChangesweremadetoaddressthecurrentindustrytrendintheutilizationofVAV(VariableAirVolume)laboratoryventilationsystems,whichprovideclearrequirementsforthecontainmentofcontaminantswithinthehood.Thelanguagewasclarifiedregardingmultipleormanifoldexhaustductswithinbuildings.This2004editionof...