AutoFlow Bathroom Fan with Humidity Sensor, 30-160 CFM EC Motor, 10.2" Retrofit Kit & 4" Duct Included

: Unlike conventional exhaust fans, this unit uses automatic airflow regulation to maintain consistent ventilation. When duct bends, static pressure, or dust buildup occur, the fan adjusts motor speed to maintain your desired airflow. Even after long-term use or changes in duct conditions, it continues to operate reliablyan essential feature for stable and lasting bathroom ventilation - : Equipped with SPECSTAR's exclusive AutoFlow Technology, the fan intelligently shifts between three speed modes based on humidity levels. At under 50% humidity, it runs a quiet 30 CFM mode; When humidity rises above 50%, it switches to 110 CFM for enhanced airflow; At 80% or higher, the system activates a powerful 160 CFM mode to rapidly remove steam and odorsdelivering targeted, efficient moisture control when it matters most : Built-in high-precision sensors constantly monitor your bathrooms humidity and automatically switch between silent, regular, and high-speed ventilation modes. Unlike traditional fans that only turn on or off, this fan adjusts airflow dynamicallyno manual input needed. In silent mode, noise drops to just 0.1 Sone and power consumption is minimal, making it perfect for 24/7 use. Quiet enough for nighttime operation, its ideal for 86129 ft bathrooms, laundry rooms, and toilets