• Fan/Filter/Duct Size: 4 Inch
• Airflow: 205CFM
• Noise: 28dB-A
• Controller Type: Speed Controller

With a 4” inline fan rated for 205CFM, an activated carbon filter with Australian charcoal, and a knob controller applied to allow easy switching and adjustment of the fan speed, the Mars Hydro 4 inch inline duct fan and carbon filter combo offers you everything you need to set up the ventilation in a grow tent. A good ventilation setup for grow tents measuring up to 3×3 feet.