Most data centers are overcooled and have humidity control issues, which is a valid concern as room temperature and humidity are two of the main HVAC energy drivers. Air management issues should be addressed first, followed by environmental conditions.
HIGH-LEVEL BEST PRACTICES
Although most computer room air conditioners (CRACs) are controlled based on the return air temperature, air intake to IT equipment is the important specification to meet.
- At Minimum, Follow ASHRAE Guidelines for Data Center Temperature Ranges
- Even Better, Operate at the Maximum ASHRAE Recommended Temperature Range (80.6°F)
- Anticipate that Servers will Occasionally Operate in a Higher, but Allowable, Range (89.6°F)
- Minimize or Eliminate Humidity Control Altogether
- Data Center Master List of Efficiency Actions provides more information on the high-level best practices outlined above as well as a more detailed list of best practices related to environmental conditions.
- Green Grid's Free-Cooling Calculator calculates potential savings attributable to the use of free cooling.