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Measure descriptions are subject to change.

Measure Description

Evaporator Specific Efficiency for Refrigerated Warehouses

A minimum specific efficiency is proposed for all non-process cooling/freezing evaporators used in refrigerated warehouses. Evaporator specific efficiency is defined as cooling capacity of the evaporator (Btu/hr) divided by the power input (Watts) required for the fan motors at rated temperature conditions at 100 percent fan speed. The rated capacity is defined at 10°F of temperature difference between the incoming air temperature and the saturated evaporating temperature of the refrigerant, assuming a dry coil. This metric is similar to what is used currently in Title 24, Part 6 for comparing the efficiency of refrigeration condensers.

Data Needs/Stakeholder Information Requests

  • Energy Savings – What are the energy savings associated with the proposed minimum evaporator specific energy efficiency?
  • Technical Feasibility – What new efficiencies / technologies have emerged since the 2022 cycle report came out?
  • Costs – What are the incremental costs and operational savings associated with having a minimum evaporator specific energy efficiency?

Data may be provided anonymously. To participate or provide information, please email DJ Joh ( directly and CC

Provide Feedback

Submit feedback and view the Energy Commission's proceedings and available proposed code language by visiting their 2025 Building Energy Efficiency Standards page.

This measure page will be updated as the 2025 code cycle progresses. For questions or suggestions, email Please include the measure name in the subject line.

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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.

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