Engineered airflow. Patented outlet design ensures even, broad=path airflow for fast, consistent drying across all surfaces. Multiple operating positions. Dry floors, ceilings, walls and stairways quickly and efficiently. Securely stackable for compact storage save space on the truck. Easily carry two units at once or stack up to six on a hand truck. Daisy-chain with GFCI outlet. Use up to 6 units per 15 amp circuit for a whopping 5400 CFM of tested not rated airflow. Durable, rugged injection-molded housing with easy-carry handle.