Fan/Duct/Filter Size: 6 Inch Airflow: 402CFM Noise: 32dBA Controller Type: Speed Controller & APP Smart Control* Filter: Refillable carbon filter The 2025 Mars Hydro 6" iFresh Inline Duct Fan delivers 402CFM airflow capacity, featuring an expansion port that enables app-based climate control when paired with the iFresh MarsPro Add-On Pack. This integration creates a fully automated ventilation system that intelligently monitors and optimizes your grow space environmental data.