Introducing the Cool Blade HVLS 24 FT Fan. The patented Tubercle Blades design uses whale power technology to produce greater air volume than other industrial fans with similar diameter. Our Tubercle Blades create a max angle reaching up to 21 to and reduce wingtip stall. By countering wingtip stall, the Tubercle Blades reduce the main source of noise and vibration. The advanced safety protection features ensure safe and stable construction and operation. The Cool Blade is inexpensive to operate and improves the performance of both new and old heating and cooling systems. On top of that the motor design reduces the need for regular maintenance saving you time and labor.