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Nonresidential Data Center Efficiency

Measure Description

The data center efficiency CASE Report will improve energy performance of data centers by pursuing the package of code change proposals listed below.

Electrical System Efficiency

This submeasure will add prescriptive requirements for data center electrical system minimum efficiency requirements, similar to ASHRAE 90.4’s Electrical Loss Component and to PG&E’s 2016 Data Center Baseline.

Data Center Heat Recovery

This submeasure will add a prescriptive requirement and a compliance option for heat recovery systems. The prescriptive requirement would require buildings that have both computer rooms and non-computer rooms of a minimum size to have  at least one form of heat recovery such as dual-fan dual duct, variable refrigerant flow, heat pumps, or district heating, or process heating. The compliance software will be updated so it is capable of modeling data center heat recovery schemes, such as ducting 95 degrees Fahrenheit data center return air to the hot deck air handler of an office dual fan dual duct system, or transferring the heat to an industrial process, such as desalination.

Power Usage Effectiveness (PUE) Monitoring

This submeasure will add a prescriptive requirement that computer rooms of a minimum size have metering installed and dashboards trending both mechanical and electrical Power Usage Effectiveness.

Server Utilization Monitoring

This submeasure will add a prescriptive requirement that computer rooms of a minimum size have Data Center Infrastructure Management software installed on most servers and dashboards trending utilization rates.  An exception could be computer rooms where most of the servers are EPA ENERGY STAR ® certified.  Computer rooms that do not meet this prescriptive requirement would be assessed a modest penalty in the performance compliance software.

Air/Water Economizer Temperatures

This submeasure will revise the computer room economizer temperature requirements and simplify to require same temperature requirements for air and water economizers.

Containment Cutoff

This submeasure will revise the threshold design load that distinguishes when an air barrier is required. Containment was relatively novel when this requirement was first proposed in 2010 but now it is the norm in data centers.  There are also many new containment products on the market, such as chimney racks, that make containment viable and cost-effective even for small server rooms.

Generator Crankcase Heating

This submeasure will add a prescriptive requirement that generators primarily serving computer rooms shall be located in a building or enclosure with dampers on both the radiator intake and radiator exhaust. The compliance software will also need to be updated to reflect this change.

Revise Baseline Temperature Schedules in Compliance Software

This submeasure will raise the SAT/RAT used in the Alternative Calculation Method baseline model from 60 degrees Fahrenheit/80 degrees Fahrenheit to 70 degrees Fahrenheit/90 degrees Fahrenheit.

Liquid Cooling Credit

This submeasure will update the compliance software so designers can receive compliance credit if liquid cooling is brought to the chip level.


Provide Feedback

Participate in the Utility-Sponsored Stakeholder meeting for this topic on October 17th, 2019! View the event here.

This measure description will be updated as research is developed to support the 2022 code cycle. For questions or suggestions, email Include the measure name in the subject line.


Relevant Documents

Measure proposals, supporting documents, and other outside references will be made public as they become available.


Give Us Your Feedback

The Statewide CASE Team values input from all stakeholders engaged in the Title 24, Part 6 code change process. We encourage the open exchange of code change comments and concerns.

  • Use the form above to provide feedback on this measure.