Quote from: ac130 on December 26, 2014, 03:16:46 AM

I am making a bitcoin (BTC) mining farm with 10 ANTMINER S5's.
https://bitmaintech.com/productDetail.htm?pid=000201412...

IMPORTANT: I don't have to pay for power so efficiency doesn't matter.

Specifications
Hash Rate: 1155 GH/s ±5%
Power Consumption: 590 W (at the wall)
Power Efficiency: 0.51 J/GH (at the wall)
Rated Voltage: 12V
Dimensions: 298 mm x 137 mm x 155 mm
Cooling: 1x 12038 fan
Operating Conditions: 0 °C to 35 °C

Notes
PSU: A power supply unit is not included, and you will need to provide an ATX PSU. There are 4 PCI-e connectors for +12V DC input and all four are required. Do not connect more than one PSU to the same hashing board.

I am going to be running these 24/7

Reconsider the whole idea!!!
If you MUST, consider used for best value.
I'm not trying to ruin your fun, I'm trying to save you some pain.

You mentioned grampa's hanger...
(his hanger or rented?)
I hope you have checked that the circuit can handle the load.
If there are also vehicles with fuel nearby take extra precautions about FIRE.
Will gramps mind if you slow cook his aircraft?
For siting considerations think of miners as 24/7/365 electric heaters.

I went with server PSUs. 92% efficient.
I started with hand did wiring.
http://i.imgur.com/epKz23R.jpg
The gekko boards are a good idea, I have some now.
They work for 1800, 2000, and 2500 Watt IBM PSUs.
2kW PSUs are USD $50 each used including shipping (ebay)
They are 220VAC ONLY and you have to buy cables and connectors seperately

If I were doing it again today I'd use the gekko boards and have CABLES make me PCIe power cables out of 12/3AWG outdoor extension cord wire.
I know better than to do it again today though!

I run a 4kW rail(2 PSUs @ 2kW) for each 2kW of miner.
Server PSU can run 2 or more PSU on each rail.
Disregard the double PSU warning if you choose this path.
Target PSU @ 50% of rated capacity.
That is the sweet spot for most PSU efficiency.
If one fails another can do double duty in a pinch.
@ $50 each I also have spares.

Every miner I know knows where you can get a 'good deal' on used HW, LOL

YMMV

EDIT: fixed 'some' spelling and added HW pron