Greenheck’s Vektor® line of laboratory exhaust systems now offers a direct drive arrangement 4 option available on Vektor-MH (High Plume), Vektor-MD (High Plume with Dilution), and Vektor-MS (Variable Geometry Nozzle) models. The company says the design combines a lightweight, aluminum mixed flow impeller with an industrial duty motor to provide ultra-smooth and efficient operation. Maintenance is reduced as the motor does not require lubrication for up to one year. The design also allows the motor to be safely serviced through a bifurcated opening without disassembling the fan.