This 12 inch, electrically powered Tornado Blower is made for the most demanding uses, and has explosion proof fan cooled motor. It can be used for ventilation of tanks, manholes, process vessels and similar confined spaces. It can also be used for cooling or drying applications. The unit comes fully assembled are ready to use right out of the box. It comes with 25 feet of electrical cable rated for ” Extra Hard Use”. The TEFC motor has a weatherproof plug and conforms with NEC guidelines.