Stenten’s Maradyne fan, 12 volt model.  If you are using the 12 volt model please be sure to hook directly to one 12 volt golf cart battery or hook directly to a fuse block connected to a voltage reducer. They are black with a silver three way toggle switch up for high, center for off, and down for low.  These fans draw low amps with the highest amp requirements on the 12 volt model on high being 3.2amps.  The fan diameter of this fan is approximately 6.5” and the blades are covered with a guard to prevent against injury.