Applies to: Reolink RLN4-210W, RLN8-410, and RLN16-410 except for RLN8-410-E nvr system.
All Reolink NVR system except for RLN8-410-E NVR system comes with the Fan, which is used for heat dissipation. And it's not suggested for the user to replace the fan without technical knowledge of this field since it may easily damage the nvr system.
Considering the noise caused by the fan, Reolink had replaced the fan of the new model 8 channel NVR system RLN8-410-E by the heat sink, which greatly reduced the noise from the working fan.
Reolink will consider replacing the fan for all models NVR system by the heat sink step by step in the future soon.