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Pre-Owned Inline Duct Fan A smart inline duct fan designed to quietly ventilate hydroponic grow rooms boost heating/cooling to rooms circulate fresh air exhaust projects and cool AV closets. Featuring an inline mixed-flow design the duct fan can maintain airflow even in high static pressure applications. Contains an EC-motor with PWM-control for a quiet and energy-efficient performance. Includes an intelligent controller that features advanced programming and functions. Complete kit includes one duct fan unit one thermal controller one corded thermal probe two duct clamps installation manual all necessary mounting hardware and all necessary mounting hardware. Intelligent Controller The controller can be programmed to adjust fan speeds to respond to varying high and low temperatures and humidity. For ventilation applications the controller can be set to run continuously or triggered to run at customizable speeds when given power due to its backup memory capability. Additional features include a countdown timer alarm system and eco-mode. Includes a detachable 12-foot precision probe that is water-resistant. This EC smart controller can power and control two inline fans of any size like this CLOUDLINE T6 with an S4. Quiet and Energy Efficient Design Features an EC-motor that is controlled using PWM Pulse Width Modulation. This technology enables motors to be able to run smoothly at extremely low RPM speeds without generating additional heat or noise. In addition the duct fan uses a mixed-flow design using a stator blade and dual hydrodynamic wind circles. This gives it a high static pressure rating enabling it to deliver airflow even in applications where air movement is being restricted. The motor houses dual ball bearings rated at 67000 hours which allows the duct fan unit to be mounted in any direction. The unit is IP44 rated to be highly resistant to dust and liquids and performs well even in harsh environments.