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// CODE SNIPPET

Section A4.203 Performance Approach for Newly Constructed Buildings

California Green Building Standards Code 2019 > A4 Residential Voluntary Measures > A4.203 Performance Approach for Newly Constructed Buildings
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A4.203.1 Energy Efficiency

Newly constructed low-rise residential buildings shall comply with Sections A4.203.1.1 through A4.203.1.4.

A4.203.1.1 Tier 1 and Tier 2 Prerequisites

A4.203.1.1.1 Energy design ratings and A4.203.1.1.2 Quality Insulation Installation are required for all applicable components of the building project.

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.

TABLE A4.203.1.1.1
RECOMMENDED EDR TARGETS BY CLIMATE ZONES
CZ Tier 1 Tier 2
Mixed Fuel All-Electric Mixed Fuel All-Electric
1 23 36 13 0
2 12 16 5 0
3 10 14 0 0
4 8 12 0 0
5 10 16 0 0
6 10 12 0 0
7 5 7 0 0
8 10 10 0 0
9 13 13 0 0
10 10 11 0 0
11 11 12 0 0
12 12 13 0 0
13 11 13 0 0
14 15 16 5 0
15 11 8 0 7
16 22 39 14 10
Note: Community shared options complying with Title 24, Part 1, Sec- tion 10-115 may be used to achieve Total EDR targets.

Note: For Energy Budget calculations, high-rise residential and hotel/motel buildings are considered nonresidential buildings.

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-Veri- fied Drain Water Heat Recovery.

A4.203.1.2.1 Roof Deck Insulation, or Ducts in Conditioned 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.

A4.203.1.3 Performance Standard

Comply with one of the advanced efficiency levels, either A4.201.1.3.1 OR A4.201.1.3.2, indicated below.

A4.203.1.3.1 Tier 1

Buildings complying with the first level of advanced energy efficiency shall have additional integrated efficiency and onsite renewable energy generation sufficient to achieve a Total EDR of the Tier 1 value indicated by Table A4.203.1.1.1 or lower as calculated by Title 24, Part 6 Compliance Software approved by the Energy Commission. This requirement is in addition to meeting the Efficiency EDR required for compliance with Title 24, Part 6. Measures considered to meet the Total EDR targets calculated by the compliance software include, but are not limited to, the prerequisite options specified in Section A4.203.1.2, use of Demand Response, additional energy efficiency measures (e.g., triple-pane windows), as well as onsite electric battery and/or thermal storage.

A4.203.1.3.2 Tier 2

Buildings complying with this second elective designation shall have additional integrated efficiency and onsite renewable energy generation sufficient to achieve a Total EDR of the Tier 2 value indicated by Table A4.203.1.1.1 or lower as calculated by Title 24, Part 6 Compliance Software approved by the Energy Commission. This may be reached by various paths, including improved space and water heating efficiencies, advanced electric battery controls, as well as modest oversizing of the photovoltaic system. This requirement is in addition to meeting the Efficiency EDR required for compliance with Title 24, Part 6. Measures considered to meet the Total EDR targets calculated by the compliance software include, but are not limited to, the prerequisite options specified in Section A4.203.1.2, use of Demand Response, additional energy efficiency measures (e.g., triple-pane windows), as well as onsite electric battery and/or thermal storage.

A4.203.1.4 Consultation With Local Electric Service Provider

Local jurisdictions considering adoption of Tier I as specified by A4.203.1.3.1 or Tier II as specified by A4.203.1.3.2, including local jurisdictions considering community shared solar or storage options consistent with Part 1 Section 10-115, shall consult with the local electric service provider to ensure that solar system sizing required to comply will be acceptable to the local electric service provider. The local jurisdiction shall not require onsite renewable energy generation systems that are larger than the local electric service provider will allow to be interconnected.

Related Code Sections


Section A4.203 Residential Voluntary Measures, Performance Approach for Newly Constructed Buildings
Newly constructed low-rise residential buildings shall comply with Sections A4.203.1.1 and either A4.203.1.2.1, A4.203.1.2.2 or A4.203.1.2.3 ...
California Green Building Standards Code 2016 > A4 Residential Voluntary Measures > A4.203 Performance Approach for Newly Constructed Buildings
Section A4.203 Residential Voluntary Measures, Performance Approach for Newly Constructed Buildings
Newly constructed low-rise residential buildings shall comply with Sections A4.203.1.1 through A4.203.1.4 ...
California Green Building Standards Code 2019 > A4 Residential Voluntary Measures > A4.203 Performance Approach for Newly Constructed Buildings
Section A4.203 Residential Voluntary Measures, Performance Approach for Newly Constructed Buildings
Newly constructed low-rise residential buildings shall comply with Sections A4.203.1.1 through A4.203.1.3 ...
California Green Building Standards Code 2022 > A4 Residential Voluntary Measures > A4.203 Performance Approach for Newly Constructed Buildings
A4.203.1.1 Residential Voluntary Measures, Tier 1, Tier 2, and Zero Net Energy Design Prerequisites
Each of the following efficiency measures is required for all applicable components of the building project ...
California Green Building Standards Code 2016 > A4 Residential Voluntary Measures > A4.203 Performance Approach for Newly Constructed Buildings > A4.203.1 Energy Efficiency > A4.203.1.1 Tier 1, Tier 2, and Zero Net Energy Design Prerequisites
A4.203.1.1 Residential Voluntary Measures, Tier 1 and Tier 2 Prerequisites
A4.203.1.1.1 Energy design ratings and A4.203.1.1.2 Quality Insulation Installation are required for all applicable components of the building ...
California Green Building Standards Code 2019 > A4 Residential Voluntary Measures > A4.203 Performance Approach for Newly Constructed Buildings > A4.203.1 Energy Efficiency > A4.203.1.1 Tier 1 and Tier 2 Prerequisites
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