MARS HYDRO iFresh 4 Inch Smart Inline Fan with Variable Speed Controller & Temp/Humidity Sensor - Quiet Ventilation for Grow Tents, Hydroponics, Greenhouses & Indoor Gardening - Perfect for Heating, Cooling & Air Circulation

Smart Ventilation For Indoor Grows Download the Mars Hydro APP to connect to the 4-inch inline duct fan and growers can enjoy OTA remote control and smart features including alarms, climate triggers, loop timers with a few clicks on their smartphone ... Fan speed, and on/off can also be done with your finger.

Powerful Inline Fan The Mars Hydro iFresh 4-inch inline fan provides up to 205 CFM of airflow with low noise thanks to its PWM-controlled EC-powered motor and mixed-flow design.

Superior Activated Carbon - Made of imported 1050+ Virgin Australian activated charcoal, delivering 100% filtered airflow, which provides better absorption and removes odor efficiently. Includes a machine washable pre-filter cloth to prevent carbon residue.

Flex Ducting and Clamps - Flexible ducting made of high-quality double-layer Aluminum film, prevent the duct from tearing, and prolong the service life. 360-degree arbitrary bending, smooth exhaust, easy to install. Includes 3 duct clamps.

Real-Time Environment Data Monitor - 4-inch inline fan comes with a probe sensor so key climate data - temperature and relative humidity - can be displayed in real-time on the APP screen, whether you are near your grow unit or not. When the duct fan is operating, growers can get a clear picture of the fan speed (RPM) and airflow (CFM) on the screen.