Mars Hydro 4 Inch Inline Duct Fan and Carbon Filter Combo with Thermostat Controller

Refreshing Your Grow Room: Mars Hydro inline fan and filter kits are designed to quietly ventilate indoor grow rooms/tents, transfer heating/cooling air in and out, and eliminate odors. Kits Include: 4'' Inline Duct Fan / 4'' Carbon Filter / Thermostat Controller/ Flex Ducting / Duct Clamps Quiet Operation and Powerful Ventilation: With a PWM-controlled motor and mixed-flow design, the Mars Hydro 4'' inline fan delivers airflow up to 205 CFM and operates quietly Keeps the Air Fresh: The filter core is made of activated carbon imported from Australia, bringing 100% fresh air into the grow room and eliminating bad odors, harsh tastes, and particles. Intelligent Control: High/low temperature/humidity sensor will automatically alert by sensor probe. Controller lockout feature to prevent accidental triggering. Automatic control of fan on/off and speed to achieve TEMP/HMD settings. Duct Size : 4 | Filter Size: 4 | Airflow: 205 CFM | Noise: 26 dBA | Duct Length: 33FT ?? ?? ??