American Coolair NBF Type Exhaust Fans provide the solution to fresh air ventilation in your greenhouse.  These exhaust fans are built to give you years of heavy-duty trouble-free service.  The rugged, belt-driven construction operates in any position, has permanently lubricated ball bearings, and is available with single or two speed totally enclosed motors.  These fans utilize an innovative drive assembly.  Power is applied through V Belts directly to the propeller with blade load concentrated directly over the bearings to eliminate overhung bearing load.  The exclusive, time tested design has been widely acclaimed by engineers.  The use of quality materials and precise engineering techniques in constructing wheel assemblies assure you of years of quiet, trouble-free service.

Both the fan panel and the uprights which support the motor and propeller are formed from heavy gauge steel for maximum strength and rigidity.  The propeller is composed of a heavy cast wheel with six die formed blades individually mounted.  Painted parts are coated with a thermosetting epoxy coating to provide a protective coating rated excellent for hardness, impact resistance, adhesion and chemical resistance.