TEST RESULTS

Unlike many years back I no longer have A/V amplifiers at home or the office so instead I used the ECS2512FP switch EnGenius, TPE-3012LS surveillance switch by TRENDnet, FRITZ!Box 7690 modem/router by AVM, SMT1500IC UPS by APC and the DVA1622 NVR by Synology (managed to assemble three NV-FS2 models with the parts and fans Noctua sent over, minus the grilles - since both the UPS and NVR are placed on the floor I used the NV-FS1 for those).

Thermal imaging reveals drops in temperature when using a NV-FS2 over a switch (facing downwards) but to be fair the NV-FS2 is aimed at electronics with perforated tops or sides (here even though the cover gets much cooler right under the fans interior is not as impacted and so heat is still indicated in other areas of the enclosure). Basically this is an example of how not to use the NV-FS2 (at least not if you can position it next to a perforated area).

The proper way to use the NV-FS2 with such devices is to place it on the side where the perforation is located at (since switches tend to be too thin placing them one over the other is the most cost-effective approach).

I tested the NV-FS2 both with it sucking air from inside both switches (top) and blowing air inside both switches (bottom).

With what I just said in mind the FRITZ!Box 7690 should be a much better fit for the NV-FS2 (its enclosure is partially perforated on top).

Here we can see the largest temperature reduction during my entire testing period (roughly 15 degrees Celsius).

The NV-FS1 is not really meant to cool electronics and you can see that from this test since both the UPS and NVR show an overall temperature drop of around 1 degree Celsius.