Horton’s WindShift product line now offers more fan configurations, including a wider selection of computer-optimized blades. The new WindShift WSC and WSD blade designs provide maximum efficiency in low-restriction airflow applications such as HVAC, ventilation, stationary power generators, auxiliary coolers, and others. Engineered to fit in a narrower, more compact space, these new blades have less deflection, resulting in increased durability. The fans are constructed with innovative clamshell knuckles that clamp each blade to a 0.25-in (6-mm) steel center disk, allowing the blades to be set to a specific pitch angle for increased airflow. Other options include clockwise or counterclockwise rotation and custom center disks for virtually any blade count, fan diameter, and pilot or bolt circle pattern. WindShift modular fans are offered in diameters from 18 to 60 in (450 to 1525 mm) with 3 to 16 blades, equally spaced or staggered to modulate system noise. In addition to flat plate center disc mounting, straight- and tapered-bore adapters are available. WindShift modular fFans are compatible with Horton fan drives.