With the recent release of MacroAir’s new industrial fan line, AirVolution-D, MacroAir has MacroAir’s new industrial fan line, AirVolution-D, MacroAir has pushed high-volume, low-speed (HVLS) innovation to a new level. By completely removing the gearbox that can be found on traditional HVLS fans, more than 137 moving parts have been eliminated. AirVolution-D is currently available in three model options: 370, 550 and 780. The 370 combines power with compact design. The 550 is optimal for medium to large spaces, such as auto shops, gyms and agricultural buildings. The 24-foot direct-drive 780 is designed for extra-large spaces, like warehouses, airports and stadiums.