Types of Drives
Fan Technical Terms
CFM : Cubic Feet per Minute
This refers to the amount of air a fan is able to move.
Pressure
“Inches of water” is a common method of measuring the pressure a fan will generate.
RPM : Revolutions Per Minute
This refers to how fast the fan or motor is spinning. This has a direct connection to the air pressure and volume of air it can move.
Density
The flow, pressure or head, needs to be specified at a given density which is affected by temperature and altitude.
Blower
Centrifugal fans are often referred to as blowers.
Wheel
In centrifugal fans the impellers are frequently referred to as wheels.
