BeQuiet! Pure Wings 3 (BL105): Silent, efficient, okay price

Explanatory note: We measure the static pressure without an obstacle in two different situations – with laminarized and with turbulent intake. The results in this chapter reflect the former case. That is, the air intake to the impeller is laminarized by a guidance tunnel. In such a setup, a larger volume of air is available to the fan and the achieved static pressure values are higher. This is the optimum environment in which to measure the fan parameters correctly. We discussed what the quantity “static pressure” means and how to understand it in this article.

Why is there a missing value sometimes? There may be more reasons. Usually it is because the fan could not be adjusted to the target noise level. Some have a higher minimum speed (or the speed is low, but the motor is too noisy) or it is a slower fan that will not reach the higher decibels. But the results in the graphs are also missing if the impeller is brushing against the nylon filter mesh. In that case, we evaluate this combination as incompatible. And zero in the graphs is naturally also in situations where we measure 0.00. This is a common occurrence at extremely low speeds with obstructions or within vibration measurements.