@OpenToe

Yoshi asked us to post this for you and others who need this info.

This is the fan spec for S5

Dimension: 120*120*38mm
Voltage: 12V
Start voltage: ≧8V (Power ON/OFF)
Power consumption: 1600RPM 1.68W / 4000RPM 25.8W
Rated current: DutyCycle 100% @ 2.15A
Air Flow: 4000RPM @ 178.3CFM (Max be 239CFM)
Noise: 4000RPM @ 56.7 dB-A (Measured in a Non-EchoChamber)
Life Expectancy: 40,000 hrs @ 25℃  (May degrade faster at higher temperature)
Connector: 2510-4P


you can use alternative fans, but please remember, that will void your warranty.  When you consider other fans, please pay close attention to the Voltage, RPM, CFM and the power connector!!!

S2, S3, S4, S5 and C1 fans will soon be available for sale from USA. 

Also, Bitmain does not endorse any third party solutions, however, CryptoGlance is a nice status reporting system Yoshi even uses time to time as well as M's Miner.  (Both solution works for any CGMINER API enabled Bitcoin Miners.

M's Miner Monitor can also interact with the miners and it is not just the status monitoring system.

CryptoGlance: https://bitcointalk.org/index.php?topic=569924.0
M's Miner Monitor: https://bitcointalk.org/index.php?topic=596178.0