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Mars Hydro iFresh 4-Inch Smart Inline Duct Fan and Carbon Filter Combo with Speed Controller

133.99
Fan/Duct/Filter Size: 4 Inch Airflow: 205CFM Noise: <26.8dBA Controller Type: APP Smart Control The Mars Hydro 4'' Smart Inline Duct Fan features a 4" inline fan rated at 205CFM and a smart core controlled by OTA (over-the-air) information flow, providing you with a highly automated and configured ventilation fan to intelligently manage the climate data of your grow space.