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Appendix A4

Section A4.108

California Green Building Standards Code (Title 24, Part 11) · 2019 edition · updated 2026-09-12 · California

INNOVATIVE CONCEPTS AND LOCAL

ENVIRONMENTAL CONDITIONS

A4.108.1 Innovative concepts and local environmental conditions. The provisions of this code are not intended to prevent the use of any alternate material, appliance, installa

tion, device, arrangement, method, design or method of construction not specifically prescribed by this code. This code does not limit the authority of city, county, or city and county government to make necessary changes to the provisions contained in this code pursuant to Section 101.7.1.

TABLE A4.106.10 MAXIMUM ALLOWABLE BACKLIGHT, UPLIGHT AND GLARE (BUG) RATINGS 1,2

ALLOWABLE RATING LIGHTING ZONE
1		 LIGHTING ZONE
2		 LIGHTING ZONE
3		 LIGHTING ZONE
4
Maximum Allowable Backlight Rating3
Luminaire greater than 2 mounting heights (MH) from property line No Limit No Limit No Limit No Limit
Luminaire back hemisphere is 1 – 2 MH from property line B2 B3 B4 B4
Luminaire back hemisphere is 0.5 – 1 MH from property line B1 B2 B3 B3
Luminaire back hemisphere is less than 0.5 MH from property line B0 B0 B1 B2
Maximum Allowable Uplight Rating
For area lighting4 U0 U0 U0 U0
For all other outdoor lighting, including decorative luminaires U1 U2 U3 U4
Maximum Allowable Glare Rating5
Luminaire greater than 2 MH from property line G1 G2 G3 G4
Luminaire front hemisphere is 1 – 2 MH from property line G0 G1 G1 G2
Luminaire front hemisphere is 0.5 – 1 MH from property line G0 G0 G1 G1
Luminaire back hemisphere is less than 0.5 MH from property line G0 G0 G0 G1
  1. IESNA Lighting Zones 0 and 5 are not applicable; refer to Lighting Zones as defined in the California Energy Code and Chapter 10 of the California Administrative Code.
  2. For property lines that abut public walkways, bikeways, plazas and parking lots, the property line may be considered to be 5 feet beyond the actual property line for purpose of determining compliance with this section. For property lines that abut public roadways and public transit corridors, the property line may be considered to be the centerline of the public roadway or public transit corridor for the purpose of determining compliance with this section.
  3. If the nearest property line is less than or equal to two mounting heights from the back hemisphere of the luminaire distribution, the applicable reduced Backlight rating shall be met.
  4. General lighting luminaires in areas such as outdoor parking, sales or storage lots shall meet these reduced ratings. Decorative luminaires located in these areas shall meet U-value limits for “all other outdoor lighting.”
  5. If the nearest property line is less than or equal to two mounting heights from the front hemisphere of the luminaire distribution, the applicable reduced Glare rating shall be met.

102 2019 CALIFORNIA GREEN BUILDING STANDARDS CODE

Copyright © 2019 ICC. ALL RIGHTS RESERVED. Accessed by Kevin Day (kevin.day@dgs.ca.gov), (California Building Standards Commission) Order Number #100735044 on Jul 24, 2019 03:54 PM (PDT) pursuant to License Agreement with ICC. No further reproduction or distribution authorized. Single user only, copying and networking prohibited. ANY UNAUTHORIZED REPRODUCTION OR DISTRIBUTION IS A VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER.

100735044

APPENDIX A4

RESIDENTIAL VOLUNTARY MEASURES

A4.203.1.1.1 Energy design ratings: Total Energy Design Rating (Total EDR) and Energy Efficiency Design Rating (Efficiency EDR). Total EDR and Efficiency EDR ratings for the Proposed Design Building shall be computed by Compliance Software certified by the Energy Commission as described in Title 24, Part 6, Section 100.1 and 150.1(b), and these ratings shall be included in the Certificate of Compliance documentation.

A4.203.1.1.2 Quality Insulation Installation (QII). The QII procedures specified in the Building Energy Efficiency Standards Reference Appendices RA3.5 shall be completed.

A4.203.1.2 Tier 1 and Tier 2 prerequisite options. In addition, ONE of the following efficiency measures will be required: A4.203.1.2.1 Roof deck insulation, or ducts in conditioned space; OR A4.203.1.2.2 High Performance Walls; OR A4.203.1.2.3 HERS-Verified Compact Hot Water Distribution System; OR A4.203.1.2.4 HERS-Verified Drain Water Heat Recovery.

A4.203.1.2.1 Roof deck insulation, or ducts in condi- tioned space. Meet one of the three options for the location of ducts and air handlers as well as insulation R -values and installation of a radiant barrier as specified in Title 24, Part 6, Section 150.1(c)9A or B:

  1. Below roof deck insulation with a minimum R value of 19; or,

  2. Continuous above deck insulation with a minimum R-8 and with an air space present between the roofing and the roof deck; or,

  3. All ducts and air handlers in conditioned space as specified in the Title 24, Part 6 Reference Appendices RA3.1.

A4.203.1.2.2 High Performance Walls (HPW). HPW meet the climate zone dependent U -factor and insulation values for either 2x6 or 2x4 framing as specified in Title 24, Part 6, Section 150.1(c)1B: maximum U -factor of 0.048.

A4.203.1.2.3 HERS-Verified Compact Hot Water Distribution System (CHWDS-H). CHWDS-H shall be installed as specified in the Title 24, Part 6 Reference Appendix RA3.6.5.

A4.203.1.2.4 HERS-Verified Drain Water Heat Recovery (DWHR-H). DWHR-H shall be installed as specified in Title 24, Part 6 Reference Appendix RA4.4.21.

Division A4.2 – ENERGY EFFICIENCY

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▸Contents — California Green Building Standards Code (Title 24, Part 11)
California Green Building Standards Code (Title 24, Part 11)
  1. Chapter 1 — ADMINISTRATION
  2. Chapter 2 — DEFINITIONS
  3. Chapter 3 — GREEN BUILDING
  4. Chapter 4 — RESIDENTIAL MANDATORY MEASURES
  5. Chapter 5 — NONRESIDENTIAL MANDATORY MEASURES
  6. Chapter 6 — REFERENCED ORGANIZATIONS AND STANDARDS
  7. Chapter 7 — INSTALLER AND SPECIAL INSPECTOR QUALIFICATIONS
  8. Chapter 8 — COMPLIANCE FORMS, WORKSHEETS AND REFERENCE MATERIAL
  9. ▸Appendix A4
    Overview
    1. Section A4.101
    2. Section A4.102
    3. Section A4.103
    4. Section A4.104
    5. Section A4.105
    6. Section A4.106
    7. Section A4.107
    8. Section A4.108
    9. Section A4.201
    10. Section A4.202
    11. Section A4.203
    12. Section A4.305
    13. Section A4.306
    14. Section A4.301
    15. Section A4.302
    16. Section A4.303
    17. Section A4.304
    18. Section A4.401
    19. Section A4.402
    20. Section A4.403
    21. Section A4.404
    22. Section A4.405
    23. Section A4.406
    24. Section A4.407
    25. Section A4.408
    26. Section A4.409
    27. Section A4.410
    28. Section A4.411
    29. Section A4.501
    30. Section A4.502
    31. Section A4.503
    32. Section A4.504
    33. Section A4.505
    34. Section A4.506
    35. Section A4.507
    36. Section A4.508
    37. Section A4.509
    38. Section A4.601
    39. Section A4.602
    40. Section A4.602
    41. Section A4.602
    42. Section A4.602
    43. Section A4.602
    44. Section A4.602
    45. Section A4.602
    46. Section A4.602
    47. Section A4.602
    48. Section A4.602
  10. Appendix A5

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