Hello,

I'm back with an update. Also want to mention that the room in which the miners are housed in has a fixed temperature of 25C/77F and is not something I can change but it does set a standard for a controlled environment.

All the kit I ordered from Parallel Miner has arrived and was installed. Sadly, the new fans only deliver on the increased sounds promise (which went from a loud hum to annoying, high-pitched howling) and nothing else.

1. They don't work in a push-pull configuration as in, you can't put two fans on one miner. You can replace either the intake or exhaust fan but not both because then the miner won't turn on anymore (does the full-speed fan check then turns it off)
2. They don't cool better than the original fans. Temperatures either stayed the same or increased with these TVN6100 fans, regardless if they were put as intake or exhaust fans.

Testing was done over a period of one week, testing each miner (13, 13.5 and 14TH/s) from stock to full auto-tuned and with swapping the fans from intake to exhaust and back again.
By sheer luck, I did find a fan configuration that works in a push-pull setup and dropped temps by 10C/50F while maintaining the same sound.

It's the SG121238BS + G1238C12B8ZP-C5. These two worked on all miners in both configurations.

Two good things came out of this:

1. I sold the miners: too loud, too power-hungry and way too hot.
2. Got cheap fans which I'm using to cool my other rigs and I can set them at lower speeds, solving the noise issue.

Thank you all for your input on this. I've learned a lot. Cheers!