Cool idea. I am planning covering up the top and bottom sections with perspex and adding a peltier cooler device to the front of the S5 maybe infront of the stock fan or after. Will have to do some tests.
Based on the previous posts. -10C intake air gives a nice ~30C running temp.

Shall See when the unit arrives.

Thanks for posting this, a video on the site answered a big question I had which was would a fan work submerged in mineral oil and the answer is yes (but much slower), wonder if a stronger motor would fair better (ie., 1 amp to 3.25 amp).  With the video, it shows that miners submerged, may just be the answer for those willing to pay for the quiet at home.  Now for the ultimate home project, wait for the C2 to be released and have 2 running in mineral oil with one radiator for the mineral oil and one for the coolant.  Wonder if someone has done something really crazy like that, with the coolant radiator also submerged in mineral oil in a separate tank (with the oil going through a radiator on a separate channel)?

I'm getting 69 and 65 temperature?

Is this okay to long time?

  too hot.  what freq are you on?

what is your room's temp?

what fan are you using? stock or a mod?