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Nonresidential Daylighting Measures

Measure Description

Daylighting measures use a comprehensive approach to daylighting design and control strategies that maximize the use of natural light while minimizing glare and solar heat gain. Several submeasures to promote more efficient use of daylight and to generate more energy savings.

After initial research, including interviews with stakeholders, the Statewide CASE Team determined that the submeasures below did not meet the Energy Commission’s requirements for market readiness, technical feasibility, cost-effectiveness, or enforceability at the time they were considered. The nonresidential daylighting submeasures that are included in the 2022 Code Cycle can be seen here: Nonresidential Daylighting.

Shading Power Adjustment Factor (PAF) Improvements

The shading power adjustment factor (PAF) improvements submeasure was largely comprised of code language changes to improve the clarity, consistency, terminology and syntax of the current code language and has therefore been moved to the Code Cleanup Initiative.

This submeasure would simplify and correct the existing language for the Daylighting Design Power Adjustment Factors (PAFs). Some features of the PAF are better placed in the mandatory sections of the code rather than the prescriptive sections so that those features are also required under the performance path. Requirements would also be reviewed to evaluate whether their modification or deletion can be justified so as to increase the opportunities for installation on projects and ease the burden of compliance.

While implementing the PAFs in the 2019 code cycle, various errors or ambiguities were uncovered that require correction. The set of savings calculations derived in the development of the PAFs in 2019 vary depending on spacing, tilt and reflectance. This set would replace the single PAF value in the performance path compliance software.

Relevant Documents

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

Round One Utility-Sponsored Stakeholder Meeting Materials

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.