The LabGard NU-819 is a Dead Air Box or a Class I Vented Enclosure with the use of an external blower designed to contain and remove contaminants from the work surface with the aid of an external exhaust system. The NU-819 is a partially enclosed workspace with an air barrier inflow velocity set between 75 and 100 FPM providing optimal personnel protection for handling low risk aerosols and particulate matter.