SUNCOURT Flush Fit 13.75-in x 7.75-in White ABS Resin Louvered Register Booster

The Suncourt Flush Fit Smart Register Booster quietly boosts heated or cooled air to a room to improve circulation and comfort. This register booster features a built-in temperature sensor and works automatically with forced air systems. The Flush Fit Smart Register Booster's quiet 5-speed; dual fans pull extra air out of weak registers, boosting airflow by up to 85%. It is a simple, energy efficient and safe solution for rooms that are too hot or too cold.