BIOWIND Quiet Register Booster Fan, Smart Register Vent Fits 4" x 10" Register Holes with Remote Control and Thermostat Control

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About this item:
A quiet fan system designed for improving wall and floor vents airflow from HVAC systems to increase home comfort. Eliminate Uneven Room Temperatures: Biowind smart register vent equipped with programmable LED controller and high-precision temp sensor to work with HVAC. It can automatically turn on/off vent fan to heat or cool the rooms at the right time.