Tjernlunds Duct Booster Register Booster Fans increase air flow to rooms that are too hot or too cold. These all metal high velocity register fans increase weak air flow from registers quickly and easily. power cordPlugs into standard 120V outletBlower wheel is screened to protect small fingers and block debrisEasy-to-install fan is 50% quieter than prop-style fansModel # RB12W.
