Advertised Vs. Real Performance
This is probably the most crucial page, showing how accurate is the data provided by the manufacturers/brands on their products. Since nobody so far could verify these numbers, it was an open field for every brand to declare whatever it wanted, but this stops now.
- Max Speed (RPM): 1500/ 1568
- Max Input Current (A): 0.08 / 0.09
- Max Power (W): 0.96 / 1.12
- Qmax (CFM): 56 / 60.6
- Pmax (mmAq): 1.49 / 1.34
- Max Noise Level (dBA): 23.3 / 26.1
The claimed airflow is 8.2% higher than the claimed performance. The claimed static pressure is far from the true one, with a 10.07% difference. The same goes for the maximum noise output, where I measured 2.8 dBA higher. For the record, a 3 dB difference means double the energy level, but in reality, a 3 dB change is around a 23% increase in perceived loudness. That said, still be quiet! is among the very few brands being so close in the reported noise measurements! So far, I rarely find a below 3 dBA noise measurement deviation between the real and advertised reading, with the deviations in several cases exceeding 6 dBA.
There are specific guidelines for taking noise measurements in information technology and telecommunications equipment (ISO7779: 2018), which I follow strictly.
