The Delta SIG110L is a powerful ventilating fan designed for use in bathroom/utility rooms. With a 4-inch diameter duct size, it efficiently moves air and keeps your space fresh. This model features built-in lighting, making it perfect for illuminating the room as well. The LED lighting technology ensures energy efficiency while providing ample light output with 1600 lumens. The single-speed fan operates at a low sound level of 0.4 sones, ensuring quiet operation and minimal disturbance. With an airflow of 110 CFM and an efficacy rating of 8.5 CFM/W, this ventilating fan effectively removes odors and moisture from the air, promoting better indoor air quality. The unit has a power factor of 0.9, maximizing its energy efficiency. The Delta SIG110L is equipped with various advanced features such as dimming motion sensing capabilities that allow you to customize the settings according to your preferences and needs (special features dimming/motion sensing/etc). Additionally