Be that as it is, the BQT T9225-MR-PWM Shadow Wings fan 92mm is the second replacement for said Klapper fan. At first I had tried a ARCTIC AFACO-12PP0-GBA01 92mm fan, which, however, in spite of correct function had problems with the speedometer signal, and takes approximately 900rpm only 82 routes indicated and permanently cared for false alarms.
The BQT T9225-MR-PWM Shadow Wings fan 92mm works as opposed to the aforementioned Arctic Silent fan properly and delivers a clean speedometer signal. The volume level is virtually imperceptible in 1 meter distance. By cleverly implemented decoupling of the fan from the case - be quiet! putting on rubber pads and special mounting pins - there is no mechanical running noises or other resonances. Installation is possible in both directions, so the fan can optionally screwing in the air into the housing or addition blow.
For me strong buy recommendation!
