The Mars Hydro 4″ inline duct fan is rated for max 205CFM, sufficient for grow tents or grow rooms measuring up to 3×3 ft. With a knob fan speed controller, the inline fan speed can be adjusted from the lowest to the highest by a simple turn of the knob. Featuring an EC-powered motor and a mixed-flow design, the Mars Hydro inline fan is quiet enough to run at full power with only 28 dBA of noise.

Designed for efficient air filtration, the inner core of the Mars Hydro carbon filter was made of 1050+ Australian activated charcoal, eliminating undesirable odors, pungent smells, and particulates from indoor grow tents. The double-sided galvanized steel mesh provides 53% of the open area for airflow to pass through, so that the odor absorption and chemicals elimination process can be carried out thoroughly. (The carbon filter was covered by a prefilter cloth; do not remove it when using)

This ventilation kit is paired with a 25-ft-long PVC thermoplastic flexible duct tube to direct the air in and out properly, durable and easy to use. With 2 adjustable hanging straps and 3 duct clamps to easily connect the inline fan, carbon filter, and ducting tube, the whole ventilation kit gets all the necessary parts to ventilate and filtrate indoor grow tents and grow rooms.

The Mars Hydro 4 inch inline duct fan and carbon filter combo ventilation kit is capable of ventilating and filtrating a 2×2 grow tent, a 2.3×2.3 grow tent, or a 3×3 grow tent, the best partner to control your grow environment with fresh cool air.