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4.201 Add the following section:
4.201.2. Renewable energy and better roofs.
(a) Newly constructed Group R occupancy buildings which are 4 occupied floors or greater, and less than or equal to 10 or fewer occupied floors and which apply for a building permit on or after January 1, 2017 shall install solar photovoltaic systems and/or solar thermal systems in the solar zone required by California Code of Regulations (CCR), Title 24, Part 6 Section 110.10.
(b) The minimum solar zone area for the project shall be calculated under Title 24, Part 6, Section 110.10(b) through (e), as applicable, and Residential Compliance Manual Chapter 7 or Nonresidential Compliance Manual Chapter 9, as applicable, except as provided below.
(1) For High Rise Multifamily Buildings and Hotel/Motel Occupancies, Exceptions 3 and 5 to Title 24, Part 6, Section 110.10(b)1B may be applied in the calculation of the minimum solar zone area. Exceptions 1, 2, and 4 may not be applied in the calculation. For High Rise Multifamily Buildings and Hotel/Motel Occupancies subject to Planning Code Section 149, Exception 5 may be applied in the calculation of the minimum solar zone area, and Exceptions 1, 2, 3, and 4 may not be applied in the calculation.
(2) Buildings with a calculated minimum solar zone area of less than 150 contiguous square feet due to limited solar access under Exception 5 to Title 24, Part 6, Section 110.10(b)1A or Exception 3 to Title 24, Part 6, Section 110.10(b)1B are exempt from the solar energy requirements in this Section 4.201.2.
(c) The sum of the areas occupied by solar photovoltaic collectors and/or solar thermal collectors must be equal to or greater than the solar zone area. The solar zone shall be located on the roof or overhang of the building, or on the roof or overhang of another structure located within 250 feet of the building or on covered parking installed with the building project. Solar photovoltaic systems and solar thermal systems shall be installed in accord with: all applicable State code requirements, including access, pathway, smoke ventilation, and spacing requirements specified in CCR Title 24, Part 9; all applicable local code requirements; manufacturer’s specifications; and the following performance requirements:
(1) Solar photovoltaic systems: The total nameplate capacity of photovoltaic collectors shall be at least 10 WattsDC per square foot of roof area allocated to the photovoltaic collectors.
(2) Solar thermal systems: Single family residential solar domestic water heating systems shall be OG-300 System Certified by either the Solar Rating and Certification Corporation (SRCC) or the International Association of Plumbing and Mechanical Officials (IAPMO). Solar thermal systems installed in all Group R occupancy buildings other than single family residences shall use collectors with OG-100 Collector Certification by SRCC or IAPMO, shall be designed to generate annually at least 100 kBtu per square foot of roof area allocated to the solar thermal collectors. Systems with at least 500 square feet of collector area shall include a Btu meter installed on either the collector loop or potable water side of the solar thermal system.
(d) Approval by the Planning Department of compliance with the Better Roof requirements, including the Living Roof alternative, as provided in Planning Code Section , shall be accepted for compliance with San Francisco Green Building Code Section 4.201.2(a) through (c). The requirements of CCR Title 24, Part 6, Section 110.10 for the solar zone shall still apply.
4.201.3 Energy Performance.
(a) All-electric buildings. A newly constructed all-electric building shall be designed and constructed such that the Total Energy Design Rating and Energy Efficiency Design Rating for the proposed building are no greater than the corresponding Energy Design Ratings for a Standard Design Building compliant with California Title 24 Part 6 Energy Standards.
(b) Mixed-fuel low-rise residential buildings. A newly constructed mixed-fuel low-rise residential building shall:
(1) Be designed and constructed such that the Energy Efficiency Design Rating for the proposed building is no greater than the Energy Efficiency Design Rating for the Standard Design Building; and
(2) Be designed and constructed such that the Total Energy Design Rating for the proposed building is 14 or less, as calculated by compliance software approved by the California Energy Commission.
Exception: Mixed-fuel low-rise residential buildings with limited solar access are excepted if a photovoltaic (PV) system meeting the minimum requirements as specified in California Energy Standards Joint Appendix JA11 is installed on all available areas of 80 contiguous square feet or more with effective annual solar access. Effective annual solar access shall be 70% or greater of the output of an unshaded PV array on an annual basis, wherein shade is due to existing permanent natural or human-made barriers external to the dwelling, including but not limited to trees, hills, and adjacent structures.
(c) Mixed-fuel high-rise residential buildings. A newly constructed mixed-fuel high-rise residential building shall be designed and constructed such that the Energy Budget for the proposed building is no greater than 90% of the Title 24 Part 6 Energy Budget for the Standard Design Building as calculated by compliance software approved by the California Energy Commission.
(Added by Ord. 003-20, File No. 190974, App. 1/17/2020, Eff. 2/17/2020, Oper. 2/17/2020)