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Fan has gearless motor

MacroAir Technologies Inc.'s AirVolution-D high volume, low speed (HVLS) fan features a gearless motor and is offered in four models. AirVolution-D3 is an entry-level model. Model 370 blades are 6 to 12 feet and the HVLS fan is designed for small spaces. Model 550 blades are 8 to 18 feet and the fan is designed for medium to large spaces. Model 780 blades are 20 to 24 feet and the fan is designed for heavy-duty applications in large spaces.