An air-driven ceiling fan uses air from the duct work system of a home such as the central air-conditioning system to harness that air flow and drive a ceiling fan having a plurality of blades which are spaced from the ceiling and upon a common shaft in a horizontal plane. Air flow through the duct work drives a squirrel cage blower which is mounted about a vertical axis so that air flow through the duct work also drives the squirrel cage blower and the ceiling fan.