Tjernlund Products offers a family of Duct Booster Fans designed for easy installation within heating/cooling ducts to increase flow of conditioned air to desired areas. These fans can boost air flow to hard-to-heat or cool rooms, as well as exhaust foul air from a bathroom or pole barn. There are models of varying capacities for installation in metal and flex ductwork that operate quietly and are built to provide years of trouble-free service. Optional accessories are available for automatic activation and to control fan speed.
Tjernlund Products. www.tjernlund.com