I dont even know that you also mine Burst Coin, I just think you mine ETH haha. How much Tb of your farm, and I wonder why you use all HDD not external hard drive which is typically cheaper and consumes less power than HDD. Btw, your setup is too cool. I have only 80Tb but I just make it like this haha.

Buy some usb fans for those HDD's like this one;
https://www.arctic.ac/eu_en/products/accessories/usb-fan.htmlI own 3 of those those HDD's and they get pretty hot after some time. Probably not dangerous but keeping them cool might extend their life.
One fan can cool 3 of your HDD's. Those seagates have 2 usb ports on the front panel. You can dial your fan there.
Thank you very much for your suggestion. Yeah, it's quite hot without fan. Actually, I open the window all the time for this room (the living room

), I am going to move 1 of 1 GPU rig back home here, and I think I will buy 1 40cm fan to make all cool.