Greenheck’s model DDF is a directional destratification fan that improves comfort and reduces energy costs by efficiently mixing air from floor to ceiling for uniform temperature distribution. The high-performance direct-drive model DDF is available in three sizes and performance levels: a 10-inch diameter for ceilings up to 25 feet, a 12-inch diameter for ceilings up to 45 feet, and a 14-inch diameter for ceilings up to 60 feet. Model DDF features an aerodynamically optimized housing for maximum airflow, throw distance, and coverage area and includes Greenheck’s Vari-Green electronically commutated (EC) motor and controls technology for maximum efficiency and controllability. A universal ceiling mount and plug-and-play wiring allow for easy installation. The DDF directional destratification fan is ideal as a standalone unit for providing air circulation in tight spaces or in tandem with AMPLIFY HVLS overhead fans in commercial, industrial, and institutional applications — especially in buildings with high ceilings, such as warehouses and manufacturing facilities.