SMART SENSE fan
Brushless DC motor fans for long life
White Polymeric Grille with torsion springs
Detachable 6″ polymeric collar which includes a light weight back draft damper
Features a built-in adjustable low speed, designed for continuous 24 hours operation.
Comes with a 5 position selector switch that is factory set to provide 5 different air performances ranging from 80 to 140 CFM