Ultra-Quiet Operation 1 Sone This bathroom exhaust fan with light is equipped with a 35W DC motor, operating at just 1 sone for ultra-quiet, efficient ventilation. Enjoy fresh air at night without disturbing your family s rest. Tested to be quieter than standard bathroom exhaust fan, it adds comfort and quality to your bathroom experience. Easy to Install 9.84" x 9.84" TEPU bathroom fan with light is designed for 9.84" x 9.84" ceiling openings and includes a standard 4" duct. With just a few basic tools, installation of this bathroom vent fan with light can be completed in about 30 minutes. Its DIY-friendly design saves time and labor, making installation simple and efficient while delivering a professional finish with minimal effort.