Laboratory fume hoods, chemical fume hoods, bench top fume hoods, distillation fume hoods, walk-in fume hoods, California fume hoods, ductless fume hoods, ventilated laboratory workstations, laboratory balance enclosures, and particulate and gas-phase filtration systems for ventilated enclosures/balance enclosures; and laboratory fume hood face velocity controls and monitors, room pressure controls and monitors, support equipment, including air flow volume control devices (dampers and valves), fume hood scrubbers, and sensors