Previous page Next page 1 EC MOTOR 2 LOW NOISE 3 MIXED FLOW 4 VARIABLE CONTROLLER Powerful EC Motor Using an EC motor (with dual ball bearings), it runs smoothly at very low speeds without generating additional heat or noise. Features a hybrid flow design with high static pressure ratings to provide airflow in applications where air flow is restricted. Rated for 5,000 hours of operation. Adjustable Controller The duct fan is equipped with variable speed controller, it can precisely optimize the fan's speed.The NMB ball bearing motor is equipped with standard thermal overload protection (STOP) with automatic restart. The fan are fully speed controllable through the controller. What is the difference between AC fan and EC fan？ AC fan, simple structure, low manufacturing cost, high power and high noise. EC fan, high intelligence, high energy saving, high efficiency, long life, low vibration, low noise, has obvious advantages in power saving and noise reduction. Can it be connected to a 6" hose? Yes, you will need to purchase an 8 to 6 reducer so that it can be installed with all 6" accessories. What is the length of the power cable of the fan and the cable of the controller respectively? The power cable is 1 meter long and the controller cable is 5 meters long, designed to allow you to control the fan to the maximum extent and to easily install the controller in the position you desire. Does it have enough wind power to exhaust the air and impurities from the greenhouse？ At full speed, it can move 760+ cfm without worrying about its lack of airflow, and you can add a filter to facilitate the adsorption of airborne impurities. Can the fan be used in a humid environment or around a fireplace? Very hot air, or very humid air, will damage the internal components of the fan, you just need to control the distance to use, my advice is to connect with the hose, so as to be able to ensure the life of the fan to a certain extent.