DDPow 4"x10" Vent Register Booster Fan, Strong Steel Panel, Ultra-Quiet, 10-Speed, Built-In Thermostat, Mechanical Damper, Efficient HVAC Vent Fan (Matte White, 1 Pack)

Features

• 1. Sturdy All-Steel Construction: Both front and rear panels are made from premium steel—not plastic—delivering durability that far exceeds mainstream competitors. Our product weighs up to 1.75× more than most models and 1.25× more than other high-end brands, reflecting our commitment to quality.
• 2. Superior In-Duct Temperature Sensing: Advanced in-duct temperature sensors are more accurate and reliable than outdated airflow-based methods. Unlike airflow sensors, our system does not require closing the duct to improve detection accuracy. Even when the fan is at full speed and the duct is open, it can precisely detect when the HVAC is off—something airflow sensors often miss—and fully utilize the remaining cool or warm air after the HVAC shuts down.
• 3. Industry-Leading 10-Speed Ultra-Quiet Fan: Features 10 optimized speeds. Enjoy ultra-quiet operation on sleep-friendly levels (1–6), surpassing competitors who are only quiet on 1–3. Higher speeds (7–10) boost airflow for home or commercial needs.
• 4. Plug-In Design, No Battery Anxiety, with Three Independent Modes: This booster fan enhances airflow in HVAC ducts with a plug-in design—eliminating battery or charging concerns. It offers three independent modes: Cooling, Heating, and Ventilation, along with five operational options.
• 5. Manual Mechanical Damper for Airflow Control: Equipped with a manual damper that can completely block airflow when needed or be adjusted for precise airflow control. Ideal for shutting off airflow to unused rooms to save energy, or for limiting airflow in rooms that become too cold or hot due to excessive HVAC output.