What is the difference between commercial- and industrial-grade fans?
A Commercial grade fan is generally constructed of metal, and has a metal blade, that is used to circulate the air. Commercial grade fans are generally more powerful than other fans and are used in commercial applications. The blade size ranges from 12″ to 30″. An industrial grade fan is also constructed of metal and has a metal blade, however, an industrial grade fan must have a sealed motor to be considered for industrial application. An industrial grade fan that is generally constructed out of metal, or having a metal blade, that is used to circulate the air. The blade size ranges from 18″ to 30″.