This heavy-duty aluminum fan can be used as a blower or exhaust by simply reverse mounting. Compressed air is pushed through a nozzle at the end of each blade creating the fan to propel at speeds up to 10,500 CFM (20″ model) or 16,000 CFM (24″ model) at 100 psig quickly and efficiently. Heavy-duty ball bearings are permanently lubricated and sealed for the life of the fan. Added features include a 3/4″ side-mounted inlet connector (20″ model) or a 1″ side-mounted inlet connector (24″ model), a spark-resistant fan, and recessed handles for easy portability or it can be rolled.