Rapid ventilation for warehouses, factories or any large building. Create massive cross-breeze by induction of over 120,000 cfm. We deliver the IndEx fan to your location and place it at one of your building loading doors, Turn it on and its sucks all of the stagnant, dusty, hot air out of your building and pulls fresh air in from outside. Comes with portable generator so no additional power draw needed from your building. Give us a call 423-281-0080