Powerful Ventilation: This inline exhaust fan with 3450 RPM can generate 1763 CFM airflow, effectively circulating air, quickly move vast amount of air to exhaust odors. Sturdy and durable: Made of high-quality carbon structural steel, not easy to deform, well-made and durable. Reduced maintenance in demanding applications, even in harsh environments. Fan bearings are NSK/SKF bearings, the best quality in the world. Low Noise Level: Durable plastic fan blades rotate smoothly, EC motor provides quiet and energy-efficient performance with minimal heat and noise.High static pressure, low energy consumption. Safety Caution: Prohibit switching power supplies from being placed outdoors orin areas with humidity exceeding 90% or in direct contact with water. Do not plug or unplug the speed controller whilethe fan is powered on and running. Widely Used: The inline fan is perfect for greenhouse, planting tent, kitchen, bathroom,,restaurant, etc., to ventilate the indoor air and ensure air circulation,Effectively eliminate odors. The 12" inline duct fan with 250-3450 RPM can generate 1763 CFM airflow,effectively circulating air.