The Fantech DEDPV-705 is a UL-705 approved dryer exhaust duct power ventilator (dryer booster fan). It has a metal fan housing, fast-clamp connections for improved cleaning access, and redundant safety circuits. The integral temperature-limit switch will shut the fan off permanently in the event of a clothes dryer fire. The fan can be used on duct runs up to 140 feet (restricted to maximum 40 linear feet installation from dryer). Similar to the DBF4XLT, this model has a remote LED indicator.