EXHAUST FAN ASSEMBLY HAVING FLEXIBLE COUPLING

摘要

An exhaust assembly is provided for expelling contaminated air from a building. The assembly includes a plenum, a fan assembly attached to the plenum, and a windband (52) mounted on top of the fan assembly. The fan assembly is constructed of cylindrical outer and inner walls (100 and 106) which define a drive chamber and surrounding annular space. A fan driven by a motor whose shaft extends downward from the drive chamber draws exhaust air from the plenum and blows it up through the annular space (110) to a nozzle at the top of the fan assembly. The motor is pivotally mounted inside the assembly to provide access to the motor components when it is desired to perform inspection and maintenance.