Notes
It appears that this fan may share some components with the Yate Loon fans. The fan blades have a more curved edge than our Yate Loon samples, but the blade is similar to a Nexus fan I have (re-branded Yate Loon D12SL-12). Additionally, other sources report Yate Loon fans with these curved-edge blades. The frame has some similarities with our Yate Loon fans ? most notably the dimples near the mounting holes. The motor appears to be sleeve bearing, which all our Yate Loon fans use. My guess is that this fan and similar Yate Loon fans are sourced from the same factory, but with different specifications. Alternatively, they could be assembled in different factories, but sharing some parts (fan blades, frame, etc.).
Despite the similarities with the Yate Loon fans, motor and bearing noise was significantly higher. I attempted lubricating the fan bearing, but results were the same. Vibration is moderate on-axis, and high off-axis, with the fan tilted at 45 degrees. Airflow delivery, while abundant, is not smooth, and varies depending which way the fan is turned. Though our SLM measured only a small difference in noise between the D12SM-12 and this fan, the quality of the noise was worse. It is the noisiest fan of the group.