Mars Hydro iFresh 4-Inch Smart Inline Duct Fan and Carbon Filter Combo Vent

Fan/Duct/Filter Size: 4 Inch
Airflow: 205CFM
Noise: 26.8dBA
Controller Type: APP Smart Control
With the Mars Hydro 4'' Smart Ventilation Kit, you'll get a 4" inline duct fan that can be controlled via the app, along with a highly effective charcoal filter. This intelligent system will help you regulate and purify the airflow and climate in your grow room, keeping your plants in optimal condition.