Tjernlund Duct Boosters Standard In-Line Air Duct Boosters Fans 120 Volts; 60hz.
Designed to be installed at any angle in the branch duct of under-ventilated rooms to increase either hot or cool air flow supply. Easy to install in metal and flex duct. Galvanized steel housing with built-in duct stop on the inlet and crimped edge on the outlet.
Use in vertical and horizontal duct runs Made in USA One year limited warranty