Direct Drive
Most of the fans we build are driven by electric motors, and this requires the fan wheel and/or shaft to connect with the motor shaft in some way. There are two broad classifications we use to describe this connection – 1) belt drive and 2) direct drive.
What is an Arrangement 4 Fan?
Fan arrangements, based on AMCA standards, define the way a motor drives the fan, and how the motor mounts to the fan. An Arrangement 4 Fan is a direct driven fan with the fan wheel mounted to the motor shaft.