I did the math on the thermal design of this unit. I think it should be fine, and basically equivalent to an Antminer S5.
In our facility, the new S5s (with heatsinks on both sides of the board) have ASIC temperatures of about 42-50°C when using 20°C intake air. This means that the temperature difference between the ASIC silicon and the intake is about 25°C. Given that the power usage is about 10 W, this makes the thermal resistance to air about 2.5°C/W. The delta-T is about 5°C, which makes the back ASICs about 5°C hotter than the front.
This S5+ reduces the power per ASIC to 8 W. This means that the ASICs at the front of the machine should be about 20°C hotter than the intake air at the front, or 5°C cooler than the S5. The fan to power ratio for the S5+ is about half the S5s, making the delta-T about 10°C, or 5°C hotter than the S5. Add those two things together, and the rear ASICs should be pretty much the same temperature in the S5 as in the S5+.
If anyone wants to buy one or more of these, Toomim Bros can host them.
http://toom.im. (I hope someone sends us one. I want to see how well they work.)
