AirVolution-D by MacroAir — the "Engineers of Air" — is powered by a revolutionary gearless system, featuring the world’s first compact electric motor
capable of handling the consistent torque requirements of a 24-foot diameter HVLS fan.
Sources report that at the heart of AirVolution-D is a breakthrough in motor design, that delivers 50% greater continuous horsepower and 10% more airflow than current HVLS fans on the market. A gearless motor eliminates the need for a massive gearbox, making it 45% lighter and eliminating numerous parts.
macroairfans.com