High-efficiency inline duct fan for ventilation systems in residential and commercial applications where infinite airflow controllability is required. Economical use of energy and ease of control help this fan match the demand of any job. The fan comes with a built-in 0-10V potentiometer that makes it easier to find the preferred working point without any additional wiring. Typical applications for FG 6M EC are supply or exhaust air duct systems in offices, daycare facilities, schools, gymnasiums, and manufacturing facilities where airflow adjusts to the actual demand based on a day/time schedule, occupancy, CO2 level, etc. FG 6M EC can be used as a remote-mounted exhaust fan for residential kitchens. The housing is manufactured from a two-piece stamped, galvanized construction. The two halves are joined using Fantech's unique folded seam closure, which gives the fan the first-in-class, airtight seal.