First on the list of power consumers is the exhaust fan, taking it in average use.
An exhaust fan sucks away the dirt milled off in the process.
An exhaust fan on the top of the main column removes the dust from the work surface.
An exhaust fan of ten feet diameter is placed in the cupola shaft, and is used for summer ventilation only.
The leaves are blown away, and finally taken from the building by an exhaust fan.