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What is PUE? UPS System Redundancy? Cooling Equipment Redundancy? Follow

Data Center Power Usage Effectiveness (PUE) is a standard measure of facility infrastructure efficiency in the IT industry. It measures how efficiently a data center uses energy; specifically, how much energy is used by the computing equipment (in contrast to cooling, lighting,  and other overhead). PUE is the basis for the ENERGY STAR score for a Data Center.

PUE is equal to the total energy consumption of a Data Center (for all fuels) divided by the energy consumption used for the IT equipment:

                PUE = Total Facility Source Energy/ IT Source Energy

PUE is only available for properties where the only Property Type is Data Center (or Data Center + Parking).

UPS System Redundancy describes the redundant capacity of the Uninterruptible Power Supply (UPS) in a Data Center. Redundant UPS components are typically required in a Data Center to have backup UPS systems in the event of a UPS failure (not a power outage). The specific level of redundancy will depend on your particular Data Center.

  • UPS System Redundancy is not required, nor is it used in any metric calculations.
  • UPS System Redundancy is reported relative to N, where N stands for the number of UPS modules that are required to power the facility at full IT load:
    • N
    • N+1
    • N+2
    • 2N
    • Greater than 2N
    • None of the above
  • If there is no UPS system, indicate the redundancy for the PDU Meters that support the IT load. If there are multiple systems operating at different levels of redundancy, choose the option that applies to the majority of the IT load.

Cooling Equipment Redundancy describes the redundant capacity of the cooling equipment in a Data Center. Redundant cooling equipment is typically required in a Data Center to have backup cooling in case of a cooling equipment failure (not a power outage). The specific level of redundancy will depend on your particular Data Center. Cooling Equipment Redundancy is not required, nor is it factored into any metrics

If there are multiple systems operating at different levels of redundancy, chose the option that applies to the majority of the data center cooling load.

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