Molded impact resistant black polyethylene housings with UV prohibitors.
Standard base mount motors are easily replaced.
Easy to remove shutter with welded steel frame and aerodynamic PVC louvers are held in place by a stainless spring steel pin and is virtually indestructible.
Powder coated exhaust guard.
Corrosion proof airfoil polypropylene blades on 12” to 24” sizes.
36” fan has a galvanized blade.
Heavy duty motors are totally enclosed, ball bearing, high efficiency dual voltage, single phase, 60 Hz (PLF36-H is 230 volt only).
AFR is the airflow ratio. Higher AFR indicates better performance under static pressure and against wind. It is calculated by dividing fan cfm at 0.20 static pressure by cfm at 0.05 sp. Test results are complete with cone where indicated. All tests completed with shutters installed. Amps indicated are actual at 230 volts. When determining amp load for variable speed, add 20% to listed numbers. Amp loads for 115 volt supply will be approximately double. * Certified performance by BESS Labs, University of Illinois