Inline 4" Duct Fan w/Humidity Controller & App

This ventilation kit features an efficient EC motor with low noise and power consumption. It offers a duct size of 4 inches, 212 CFM airflow, and operates at 28 dB noise level. The intelligent controller allows for temperature, humidity, and fan speed settings, supporting additional fan linkage. The price drops from $75.99 to $27.99. Shipping is free for Prime members.