Re: ANTMINER S5: 1155GH(+OverClock Potential), 590W, Jan 12th Shipping [Sales Open]
I would suggest that the first thing to do is by hearing protectors. 
Haha, well we have the replacement fans ready to install. And these will be in a server room kept nice and chilly.
We will be selling off some of our B7 / B8 S3+ units to free up some PSUs.
Perfect condition, housed in Server Room at 64 F (approx) Hepa Air Handler. Clean and Like New.
I apologize if this is off topic but if there is any interest just shoot me a PM.
Strato
That reminds me, when I changed the fans on my S5's, I noticed these were "tested" in some very dirty conditions, the fans and heat sinks were covered in soot.
Thats pretty crazy. Ive seen S3+ units for sale on ebay that are literally filled with dust.
Our server room is sealed, double door, positive pressure, Hepa Filtered, and chilly. Our servers and miners literally look new even after months. Its not a "pharma" grade dustless environment, but its pretty damn clean.
Strato
I got mine new yesterday and that's how they were new. Might keep that in mind when your filters start getting dirty fast in there.