An assembly is set of manufactured parts or components that work together in unison as one mechanism or device. A blower is a centrifugal fan. It is a mechanical device for moving air or other gases. Blowers often contain a ducted housing to direct outgoing air in a specific direction or across a heat sink such a fan is also called a blower fan, or squirrelcage fan because it looks like a hamster wheel. These fans increase the speed and volume of an air stream through rotating impellers. Specifications. Voltage 120V. Height 5.85 in.. Width 9.25 in.. Length 7.15 in.