Drum Fan, Industrial, 2-Speed, 42-In.Maintain optimal air flow with the MaxxAir 42 in. 2 speed portable industrial fan. Featuring high velocity air movement, this fan is ideal for moving large volumes of hot air quickly and efficiently to keep people and machines cooled off. The rugged fan provides air circulation where and when it's needed, making it useful on the factory floor, warehouse or in a barn with livestock. This fan is belt driven for quieter operation and longevity.