Fan airflow performance

Airflow performance

On the previous page, you have been able to see the acoustics 5V and 12V settings. We'll now place a focus on airflow, and while a totally precise measurement, I'll classify this page as somewhat subjective. But we can get a good indication of airflow per fan at each setting.

example photo of Anemometer measuring airflow

With the help of a simple to use Anemometer, we can see how airflow behaves. An anemometer is a device used for measuring the speed of the wind, and actually also is a common weather station instrument. The term is derived from the Greek word anemos, which means wind, and is used to describe any wind speed instrument used in meteorology. It's a relatively cheap device to get and does seem to provide pretty steady results. Each fan is measured with the Anemometer positioned precisely as shown above. Now we can measure how much air the fan is sucking inwards, the value is measured in meters per second, higher is in this metric better, of course. 

So at a normal 4V~5V you're looking at very good airflow for the Pure Wings 3. This is why be quiet! can run them at a lower fan RPM, but still, achieve good airflow. In this chart, higher is better of course. However higher often is not better for acoustics.

Once we fully load up the fan with 12V we can measure 2.6 meters of air being moved (wind speed) each second. The fans rate really well for airflow.