North fan combined ventilation equipment: 3 axial fans, powered at 600 KW.

The Industrial Revolution in the late 19th century introduced belt-driven fans powered by factory water wheels.

Solar fan - a mechanical fan powered by solar panels.

Inside, a fan powered by an engine normally used in race cars whips up winds as strong as 100 miles an hour.

The tiny fan inside his pith helmet, normally powered by solar energy, will be battery-powered tonight.

This first-of-its-kind testing system consists of a series of large industrial fans powered by race car engines.

The wind tunnel is a double-return, atmospheric pressure tunnel with two fans powered by 4,000 hp electric motors.

Wind - the unit uses a fan powered by the cyclist's legpower to provide resistance on the rear tire.

A solar fan is a mechanical fan powered by solar panels.

A fan powered by a steam donkey engine arrived on site Tuesday morning.