Home Slickdeals BIOWIND Quiet Register Booster Fan, Smart Register Vent Fits 4″ x 10″... Slickdeals BIOWIND Quiet Register Booster Fan, Smart Register Vent Fits 4″ x 10″ Register Holes with Remote Control and Thermostat Control, Heating Cooling AC Vent Fan – White – $45 By ARCOM - 25 March 2024 9 0 SHARE Facebook Twitter Go to the deal page: BIOWIND Quiet Register Booster Fan, Smart Register Vent Fits 4″ x 10″ Register Holes with Remote Control and Thermostat Control, Heating Cooling AC Vent Fan – White – $45