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Even at maximum speed, The 120mm size operates at only 19.2 dBA)
A long-life Rifle Bearing that contributes to an operating lifetime of 80, 000 hours (> 9 years)
Nine airflow-optimized fan blades that reduce noise-generating turbulence while increasing airflow. Air flow - 51.4 CFM. Noise level - 19.2 decibels