Is the fan noise on my DVR NVR recorder normal?

Q- Is the fan noise on my recorder normal?

A- Digital or network Vide Recorder’s fan is comparable to one in a mini PC, and the sound coming out of the vent that you may hear is a sign of a DVR that’s working well.

The working fan indicates that the trapped heat is being dissipated, and the DVR can record 24/7 on the hard drive, and without this cooling mechanism, the DVR and hard drive’s life span will be shortened.