19.36.040 Amendments to the California Energy Code.

SUBCHAPTER 1: ALL OCCUPANCIES – GENERAL PROVISIONS of the 2019 California Energy Code is adopted in its entirety subject to the modifications thereto which are set forth below:

Modify SECTION 100.1(b) to add the following definitions:

ALL-ELECTRIC BUILDING is a building that has no natural gas or propane plumbing installed within the building, and that uses electricity as the source of energy for its space heating, water heating, cooking, and clothes drying appliances.

CERTIFIED ENERGY ANALYST is a person registered as a Certified Energy Analyst with the California Association of Building Energy Consultants as of the date of submission of a Certificate of Compliance as required under Section 10-103.

MIXED-FUEL BUILDING is a building that is plumbed for the use of natural gas or propane as fuel for space heating, water heating (including pools and spas), cooking or clothes drying appliances.

NATURAL GAS shall have the same meaning as “Fuel Gas” as defined in the California Plumbing Code and Mechanical Code.

NEWLY CONSTRUCTED BUILDING is a building that has never before been used or occupied for any purpose and does not include additions, alterations, or repairs.

REACH CODE is a cost-effective locally adopted energy standard that requires buildings to be designed to consume no more energy than permitted by the California Energy Code.

Add a new SECTION 100.3 to read as follows:

SECTION 100.3 REACH CODE

(a)    Buildings Covered. In addition to all requirements of the California Energy Code, newly constructed buildings shall comply with the following requirements of the Reach Code:

1.    New nonresidential, high-rise residential, and hotel/motel buildings that are designed to utilize mixed-fuel (natural gas or propane in addition to electricity) shall be required to install solar panels on the Solar Zone, as defined in Section 110.10. With the exception of laboratory, industrial, and manufacturing uses or occupancies, the new nonresidential, high-rise residential, and hotel/motel buildings shall also comply with either the prescriptive requirements of Section 140.2, as amended herein, or have a compliance margin, as defined in Section 140.1, that meets or exceeds the Standard Design Building by 10%.

2.    New low-rise residential buildings that are designed to utilize mixed-fuel (natural gas or propane in addition to electricity) shall be required to either comply with the prescriptive requirements of Section 150.1(c), as amended herein, or meet a Total Energy Design Rating (EDR) margin, as defined by the California Energy Code, of 10. The performance requirements may be reduced, but not below the requirements for the Standard Design Building, if sufficient solar access is not available.

3.    If a Certified Energy Analyst prepares the Certificate of Compliance, the design shall be credited with one (1) EDR point or one (1) percent of compliance margin, to the extent that the resultant energy budget is no greater than the energy budget for the Standard Building Design.

4.    New nonresidential, high-rise residential, and hotel/motel Mixed-Fuel Buildings shall have electrical systems and designs that support a future retrofit to facilitate the installation of all-electric appliances for all gas appliance plumbing connections. This includes electrical conductors or raceways, bus bar capacity, and space for circuit breakers.

5.    New low-rise residential Mixed-Fuel Buildings shall have electrical systems and designs that support a future retrofit to facilitate the installation of all-electric appliances for all gas appliance plumbing connections. This includes electrical conductors or raceways, bus bar capacity, and space for circuit breakers, and for equipment serving individual units only, service panel capacity and pre-wired and installed circuit breakers.

SUBCHAPTER 5: NONRESIDENTIAL, HIGH-RISE RESIDENTIAL AND HOTEL/MOTEL OCCUPANCIES‑‑PERFORMANCE AND PRESCRIPTIVE COMPLIANCE APPROACHES FOR ACHIEVING ENERGY EFFICIENCY of the 2019 California Energy Code is adopted in its entirety subject to the modifications thereto which are set forth below:

SECTION 140.0(b) is modified to read as follows:

(b)    The requirements of Sections 120.0 through 130.5 (mandatory measures for nonresidential, high-rise residential and hotel/motel buildings) including the following additional mandatory measures:

1.    Photovoltaic Requirement. The solar zone, as specified in Section 110.10, shall have a solar PV system installed, subject to the exceptions in Section 110.10.

2.    Electric Readiness: Circuit Capacity. A Mixed-Fuel Building shall have conductors or raceway installed with termination points at the main electrical panel (via subpanels panels, if applicable) and at a location no more than 3 feet from each gas outlet or a designated location of a future electric replacement appliance. The conductors or raceway and any intervening subpanels shall be sized to meet the future electric power requirements as specified below at the service voltage. The capacity requirements may be adjusted for demand factors in accordance with the California Electric Code Article 220. Gas flow rates shall be determined in accordance with the California Plumbing Code Section 1208.4.

A.    Domestic Hot Water:

i.    24 amps at 240 volts per dwelling unit; or

ii.    The electrical power required to provide equivalent functionality of the gas powered equipment as calculated and documented by a licensed design professional associated with the project.

B.    Space Heating:

i.    24 amps at 240 volts per dwelling unit; or

ii.    The electrical power required to provide equivalent functionality of the gas powered equipment as calculated and documented by a licensed design professional associated with the project.

Exception to Section 140.0(b)2B: If permanent space cooling equipment is installed for all of the affected dwelling units, the conductors or raceway serving the cooling equipment may be increased in size to accommodate the future electric space heating equipment.

C.    Clothes Dryer:

i.    24 amps at 240 volts per domestic dryer; or

ii.    The electrical power required to provide equivalent functionality of the gas powered equipment as calculated and documented by a licensed design professional associated with the project.

D.    Cooking Equipment in Residential Space:

i.    Range or cooktop: 32 amps at 240 volts per appliance.

ii.    Stand-alone oven: 16 amps at 240 volts per appliance.

E.    Pools and Spas:

i.    The electrical power required to provide equivalent functionality of the gas powered equipment as calculated and documented by a licensed design professional associated with the project.

3.    Electric Readiness: Service Capacity.

A.    A Mixed-Fuel Building shall have space for additional overcurrent protective devices as well as bus bars of adequate capacity in the main electrical panel and any subpanels to meet all of the building’s potential future electrical requirements as specified in Section 140.0(b)2.

B.    All newly installed raceways in a Mixed-Fuel Building between the main electric panel and any subpanels, and the point at which the conductors serving the building connect to the common conductors of the utility distribution system, shall be sized for conductors adequate to serve all of the building’s potential future electric loads as specified in Section 140.0(b)2.

C.    The capacity requirements may be adjusted for demand factors in accordance with the California Electric Code, Title 24, Part 3, Section 220.

4.    Electric Readiness: Other requirements. A Mixed-Fuel Building shall include the following components for equipment that serve individual residential units:

A.    Water Heating

i.    The conductors or raceway shall terminate in an area that meets all of the requirements below:

ii.    Is at least 3 feet by 3 feet by 7 feet high; and

iii.    If a condensate line is not attached to the water heater, a condensate line for future use shall be provided that is no less than 3/4 inch in diameter, compliant with California Plumbing Code Section 814, is no more than 2 inches higher than the base of the installed water heater, and located within 12 inches of the water heater.

B.    Space Heating.

i.    The conductors or raceway shall terminate in an area that has a condensate drain that is no less than 3/4 inch in diameter, compliant with California Plumbing Code Section 814, is no more than two inches higher than the base of the installed heating equipment, and located within 12 inches of the designated location of the heating equipment.

Exception 1 to Sections 140.0(b)2, 3 and 4. If the design includes bus bar capacity, raceway or conductor capacity necessary for the installation of electrical equipment that can serve the intended function of the gas equipment.

Exception 2 to Sections 140.0(b)2, 3 and 4. Facilities where natural gas is necessary to meet the requirements of other permitting agencies or is demonstrated to be necessary for the purpose of protecting public health, safety and welfare.

NOTE: The requirements of Sections 140.0(b)2, 3 and 4 are not intended to trigger additional transformer capacity from the public utility at the time of construction.

SECTION 140.1 is modified to read as follows:

SECTION 140.1--PERFORMANCE APPROACH: ENERGY BUDGETS

A building newly constructed All-Electric Building or a newly constructed Mixed-Fuel Building occupied for laboratory, industrial, or manufacturing uses complies with the performance approach if the energy budget calculated for the Proposed Design Building under Subsection (b) is no greater than the energy budget calculated for the Standard Design Building under Subsection (a).

A newly constructed Mixed-Fuel Building occupied for other than laboratory, industrial, or manufacturing uses, complies with the performance approach if the energy budget calculated for the Proposed Design Building under Subsection (b) has a compliance margin, relative to the energy budget calculated for the Standard Design Building under Subsection (a), of at least 10%.

(a)    Energy Budget for the Standard Design Building. The energy budget for the Standard Design Building is determined by applying the mandatory and prescriptive requirements to the proposed design building. The energy budget is the sum of the TDV energy for space-conditioning, indoor lighting, mechanical ventilation, service water heating, and covered process loads.

(b)    Energy Budget for the Proposed Design Building. The energy budget for a Proposed Design Building is determined by calculating the TDV energy for the Proposed Design Building. The energy budget is the sum of the TDV energy for space-conditioning, indoor lighting, mechanical ventilation and service water heating and covered process loads.

(c)    Calculation of Energy Budget. The TDV energy for both the Standard Design Building and the Proposed Design Building shall be computed by Compliance Software certified for this use by the Commission. The processes for Compliance Software approval by the Commission are documented in the ACM Approval Manual.

Exception to Section 140.1: For newly constructed buildings, if the Certificate of Compliance is prepared and signed by a Certified Energy Analyst and the energy budget for the Proposed Design is no greater than the Standard Design Building, the required compliance margin is reduced by 1%.

SECTION 140.2 is modified to read as follows:

SECTION 140.2--PRESCRIPTIVE APPROACH

To comply using the prescriptive approach, a building shall be designed with and shall have constructed and installed systems and components meeting the applicable requirements of Sections 140.3 through 140.9 and additionally the following measures as applicable intended to exceed the remaining prescriptive requirements:

(a)    Mixed-Fuel Buildings of Hotel, Motels or High-Rise Multifamily Occupancies

1.    Install fenestration with a solar heat gain coefficient no less than 0.45 in both common spaces and guest rooms.

2.    Design Variable Air Volume (VAV) box minimum airflows to be equal to the zone ventilation minimums.

3.    Include economizers and staged fan control in air handlers with a mechanical cooling capacity ≥ 33,000 Btu/h.

4.    Reduce the lighting power density (Watts/ft2) by ten percent (10%) from that required from Table 140.6-C.

5.    In common areas, improve lighting without claiming any Power Adjustment Factor credits:

A.    Control to daylight dimming plus off per Section 140.6(a)2.H; and

B.    Perform Institutional Tuning per Section 140.6(a)2.J

6.    Install one drain water heat recovery device per every three guest rooms that is field verified as specified in the Reference Appendix RA3.6.9.

(b)    All Other Nonresidential Mixed-Fuel Buildings

1.    Install fenestration with a solar heat gain coefficient no greater than 0.22.

2.    Limit the fenestration area on east-facing and west-facing walls to one-half of the average amount of north-facing and south-facing fenestration.

3.    Design Variable Air Volume (VAV) box minimum airflows to be equal to the zone ventilation minimums where VAV systems are installed.

4.    Include economizers and staged fan control in air handlers with a mechanical cooling capacity ≥ 33,000 Btu/h.

5.    Reduce the lighting power density (Watts/ft2) by ten percent (10%) from that required from Table 140.6-C.

6.    Improve lighting without claiming any Power Adjustment Factor credits:

A.    Perform Institutional Tuning per Section 140.6(a)2.J, and

B.    In office spaces, control to daylight dimming plus off per Section 140.6(a)2.H, and

C.    Install Occupant Sensing Controls in Large Open Plan Offices per Section 140.6(a)2.I.

Exception to Section 140.2(b). Newly constructed Mixed-Fuel Buildings occupied for laboratory, industrial, or manufacturing uses.

SUBCHAPTER 7: LOW-RISE RESIDENTIAL BUILDINGS--MANDATORY FEATURES AND DEVICES of the 2019 California Energy Code is adopted in its entirety subject to the modifications thereto which are set forth below:

SECTION 150.0 is modified to read as follows:

SECTION 150.0--MANDATORY FEATURES AND DEVICES

Low-rise residential buildings shall comply with the applicable requirements of Sections 150(a) through 150.0(r)(u).

NOTE: The requirements of Sections 150.0(a) through 150.0(r)(u) apply to newly constructed buildings. Sections 150.2(a) and 150.2(b) specify which requirements of Sections 150.0(a) through 150.0(r) also apply to additions or alterations.

SECTION 150.0(h) is modified to add a new subsection (5) to read as follows:

5.    Electric Readiness. Systems using gas or propane space heating equipment shall include the following components:

A.    For equipment serving individual dwelling units, a dedicated 240 volt, 30 amp or greater electrical circuit shall be provided for a future electric heater. In addition, all of the following shall be required:

i.    The circuit shall terminate within 3 feet from the designated future location of an electric heater with no obstructions into a listed cabinet, box or enclosure labelled “For Future Electric Space Heater”; and

ii.    The circuit shall be served by a dedicated double pole circuit breaker in the electrical panel labeled with the words “For Future Electric Space Heater”.

iii.    If a condensate line is not attached to the heating equipment, a condensate line for future use shall be provided that is no less than 3/4 inch in diameter, compliant with California Plumbing Code Section 814, is no more than two inches higher than the base of the installed heating equipment, and located within 12 inches of the designated location of the heating equipment.

Exception to Section 150.0(h)5.A: If a 240 volt 30 amp or greater electrical circuit exists for space cooling equipment.

B.    Equipment serving multiple dwelling units or common areas shall have conductors or raceway installed with termination points at the main electrical panel (via subpanels panels, if applicable) and at a location no more than 3 feet from each gas outlet or a designated location of a future electric replacement appliance. The conductors or raceway and any intervening subpanels shall be sized to meet the future electric power requirements as specified below and in Section 150.0(u).

i.    24 amps at 240 volts per dwelling unit; or

ii.    The electrical power required to provide equivalent functionality of the gas powered equipment as calculated and documented by a licensed design professional associated with the project.

Exception to Section 150.0(h)5.B: If permanent space cooling equipment is installed for all of the affected dwelling units, the raceway serving the cooling equipment may be increased in size to accommodate the future electric space heating equipment.

SECTION 150.0(n) is modified to read as follows:

(n)    Water heating system.

1.    Systems using gas or propane water heaters to serve individual dwelling units shall include the following components:

A.    A dedicated 125 volt, 20 amp electrical receptacle that is connected to the electric panel with a 120/240 volt 3 conductor, 10 AWG copper branch circuit, within 3 feet from the water heater and accessible to the water heater with no obstructions. In addition, all of the following:

i.    Both ends of the circuit and the unused conductor shall be labeled with the words “Hot Water Receptacle” and be electrically isolated; and

ii.    A reserved single pole circuit breaker space in the electrical panel adjacent to the circuit breaker for the branch circuit in A above and labeled with the words “Future 240V Use “For Future 240V Electric Water Heater”; and

B.    A Category III or IV vent, or a Type B vent with straight pipe between the outside termination and the space where the water heater is installed; and

C.    A condensate drain that is no more than 2 inches higher than the base of the installed water heater, and allows natural draining without pump assistance, and

D.    A gas supply line with a capacity of at least 200,000 Btu/hr; and

E.    Located in an area that is at least 3 feet by 3 feet by 7 feet high.

2.    Water heating recirculation loops serving multiple dwelling units shall meet the requirements of Section 110.3(c)5.

3.    Solar water-heating systems and collectors shall be certified and rated by the Solar Rating and Certification Corporation (SRCC), the International Association of Plumbing and Mechanical Officials, Research and Testing (IAPMO R&T), or by a listing agency that is approved by the executive director.

4.    Instantaneous water heaters with an input rating greater than 6.8 kBTU/hr (2kW) shall meet the requirements of Section 110.3(c)7.

5.    Water heating equipment serving multiple dwelling units or common areas shall have:

A.    If a condensate line is not attached to the water heater, a condensate line for future use shall be provided that is no less than 3/4 inch in diameter, compliant with California Plumbing Code Section 814, is no more than two inches higher than the base of the installed water heater, and located within 12 inches of the water heater; and

B.    Conductors or raceway installed with termination points at the main electrical panel (via subpanels panels, if applicable) and into a listed cabinet, box or enclosure at a location no more than 3 feet from each gas outlet or a designated location of a future electric replacement appliance labelled “For future water heater.” The conductors or raceway and any intervening subpanels shall be sized to meet the future electric power requirements as specified below and in Section 150.0(u).

i.    24 amps at 240 volts per dwelling unit or

ii.    The electrical power required to provide equivalent functionality of the gas powered equipment as calculated and documented by a licensed design professional associated with the project.

SECTION 150.0 is modified to add new subsections (s, t, and u) to read as follows:

(s)    Other Gas Equipment. Buildings plumbed for all other natural gas or propane equipment shall include the following components for each gas terminal or stub out:

1.    Clothes Drying.

A.    Equipment serving individual dwelling units shall have a dedicated 240-volt, 30 amp or greater electrical receptacle within 3 feet of the appliance and accessible with no obstructions. In addition, all of the following:

i.    The receptacle shall be labeled with the words “For Future Electric Clothes Dryer”; and

ii.    A double pole circuit breaker in the electrical panel labeled with the words “For Future Electric Clothes Dryer”.

B.    Equipment serving multiple dwelling units or common areas shall have conductors or raceway installed with termination points at the main electrical panel (via subpanels panels, if applicable) and at a location no more than 3 feet from each gas outlet or a designated location of a future electric replacement appliance. The conductors or raceway and any intervening subpanels shall be sized to meet the future electric power requirements as specified below and in Section 150.0(u).

i.    24 amps at 240 volts per dwelling unit or

ii.    The electrical power required to provide equivalent functionality of the gas powered equipment as calculated and documented by a licensed design professional associated with the project.

2.    Combined Cooktop and Oven or Stand Alone Cooktop

A.    A dedicated 240-volt, 40 amp or greater circuit and 50 amp or greater electrical receptacle located within 3 feet of the appliance and accessible with no obstructions. In addition, all of the following:

i.    The electrical receptacle shall be labeled with the words “For Future Electric Range” and be electrically isolated; and

ii.    A double pole circuit breaker in the electrical panel labeled with the words “For Future Electric Range”.

3.    Stand Alone Cooking Oven

A.    A dedicated 240-volt, 20 amp or greater receptacle within 3 feet of the appliance and accessible with no obstructions. In addition, all of the following:

i.    The electrical receptacle shall be labeled with the words “For Future Electric Oven” and be electrically isolated; and

ii.    A double pole circuit breaker in the electrical panel labeled with the words “For Future Electric Oven”.

4.    Pools and Spas

A.    Gas or propane equipment pools or spas shall have conductors or raceway installed with termination points at the main electrical panel (via subpanels panels, if applicable) and at a location no more than 3 feet from each gas outlet or a designated location of a future electric replacement appliance. The conductors or raceway and any intervening subpanels shall be sized to meet the future electric power requirements as specified below and in Section 150.0(u).

i.    The electrical power required to provide equivalent functionality of the gas powered equipment as calculated and documented by a licensed design professional associated with the project.

(t)    Service Capacity

1.    All newly installed electrical panels and subpanels serving loads in a Mixed-Fuel Building shall have space for additional overcurrent protective devices and adequate bus bar capacity to meet all of the building’s potential future electrical requirements as specified in Sections 150.0(h), (n) and (s).

2.    All newly installed raceways in a Mixed-Fuel Building between the utility service point and the main electric panel and any subpanels shall be adequately sized for conductors to serve all of the building’s potential future electrical requirements as specified in Sections 150.0(h), (n) and (s).

3.    The service capacity requirements of this section shall be determined in accordance with Section 150.0(u).

(u)    Conductor, Raceway and Subpanel Sizing.

1.    The capacity requirements may be adjusted for demand factors in accordance with the California Electric Code, Title 24, Part 3, Section 220.

2.    Raceway and subpanel capacity shall be sized to be large enough to meet the requirements at the service voltage.

Exception to Sections 150.0(h)5, 150.0 (n)1.A.iii, 150.0 (n)1.E, 150.0 (n)5 and 150.0(s), 150.0(t) and 150.0(u): If the design includes the bus bar capacity raceway or conductor capacity necessary for the installation of electrical equipment that can serve the intended function of the gas equipment.

SUBCHAPTER 8: LOW-RISE RESIDENTIAL BUILDINGS--PERFORMANCE AND PRESCRIPTIVE COMPLIANCE APPROACHES of the 2019 California Energy Code is adopted in its entirety subject to the modifications thereto which are set forth below:

SECTION 150.1(b) is modified to read as follows:

(b)    Performance Standards. A building complies with the performance standards if the energy consumption for the Proposed Design Building is no greater than the energy budget calculated for the Standard Design Building using Commission-certified compliance software as specified by the Alternative Calculation Methods Approval Manual. Newly Constructed Mixed-Fuel Buildings must additionally reach an EDR margin above the Standard Design in order to comply with performance standards.

1.    Newly Constructed Buildings. The Energy Budget for newly constructed buildings is expressed in terms of the Energy Design Rating, which is based on TDV energy. The Energy Design Rating (EDR) has two components, the Energy Efficiency Design Rating, and the Solar Electric Generation and Demand Flexibility Design Rating. The Solar Electric Generation and Demand Flexibility Design Rating shall be subtracted from the Energy Efficiency Design Rating to determine the Total Energy Design Rating. The Proposed Building shall separately comply with the Energy Efficiency Design Rating and the Total Energy Design Rating.

A.    An All-Electric Building complies with the performance standards if both the Total Energy Design Rating and the Energy Efficiency Design Rating for the Proposed Building are no greater than the corresponding Energy Design Ratings for the Standard Design Building.

B.    A Mixed-Fuel Building complies with the performance standards if:

i.    The Energy Efficiency Design Rating of the Proposed Building is no greater than the Energy Efficiency Design Rating for the Standard Design Building; and

ii.    The Total Energy Design Rating for the Proposed Building is at least 10 points less than the Total Energy Design Rating for the Standard Design Building.

Exception 1 to Section 150.1(b)1.B.ii: If the Certificate of Compliance is prepared and signed by a Certified Energy Analyst and the Total Energy Design Rating of the Proposed Design is no greater than the Standard Design Building, the Total Energy Rating of the Proposed Building complies with this section if it is at least 9 points less than the Total Energy Design Rating for the Standard Design Building.

Exception 2 to Section 150.1(b)1.B.ii:  Buildings with limited solar access are exempt if all of the following are met:

a.    The Total Energy Design Rating for the Proposed Building is no greater than the Standard Design Building; and

b.    A photovoltaic (PV) system meeting the minimum qualification requirements as specified in Joint Appendix JA11 is installed on all available areas with 80 contiguous square feet or more of effective annual solar access. Effective annual solar access shall be 70 percent or greater of the output of an unshaded PV array on an annual basis, wherein shade is due to existing permanent natural or manmade barriers external to the dwelling, including but not limited to trees, hills, and adjacent structures; and

c.    The Energy Efficiency Energy Design Rating for the Proposed Building is no greater than the respective value for the Standard Design Building by the EDR margin in Table 150.1(b)1 below.

Table 150.1(b)1: Energy Efficiency EDR Margins

Building Type

Energy Efficiency EDR Margin

Single Family

2

Multifamily

0

Exception to Section 150.1(b)1: A community shared solar electric generation system, or other renewable electric generation system, and/or community shared battery storage system, which provides dedicated power, utility energy reduction credits, or payments for energy bill reductions, to the permitted building and is approved by the Energy Commission as specified in Title 24, Part 1, Section 10-115, may offset part or all of the solar electric generation system Energy Design Rating required to comply with the Standards, as calculated according to methods established by the Commission in the Residential ACM Reference Manual.

SECTION 150.1(c) is modified to read as follows:

c.    Prescriptive standards/component packages. Buildings that comply with the prescriptive standards shall be designed, constructed, and equipped to meet all of the requirements for the appropriate Climate Zone shown in TABLE 150.1-A or B as well as all of the requirements of Sections 150.1(c)15 and 16, whichever are more stringent. In TABLE 150.1-A and TABLE 150.1-B, a NA (not allowed) means that feature is not permitted in a particular Climate Zone and a NR (no requirement) means that there is no prescriptive requirement for that feature in a particular Climate Zone. Installed components shall meet the following requirements:

New Subsections 15 and 16 are added to SECTION 150.1(c) to read as follows:

15.    Additional Prescriptive Requirements for Newly Constructed Single Family Mixed-Fuel Buildings:

A.    Duct System Sealing and Leakage Testing. The total duct system leakage shall not exceed 2 percent of the nominal system air handler air flow.

B.    Insulation for a Heated Slab. Perimeter insulation for a heated slab shall be installed with an R-value equal to or greater than R-10 and shall comply with the requirements of Section 110.8(g).

C.    Compact Hot Water. The hot water distribution system shall be designed and installed to meet minimum requirements for the basic compact hot water distribution credit according to the procedures outlined in the 2019 Reference Appendices RA4.4.6.

D.    Ducted Central Forced Air Heating Systems. Central Fan Integrated Ventilation Systems. The duct distribution system shall be designed to reduce external static pressure to meet a maximum fan efficacy equal to:

Gas Furnaces: 0.35 Watts per cfm

Heat Pumps: 0.45 Watts per cfm

according to the procedures outlined in the 2019 Reference Appendices RA3.3.

E.    Energy Storage. A battery energy storage system with a minimum capacity equal to 5 kWh shall be installed. The system shall have automatic controls programmed to have the ability to charge anytime PV generation is greater than the building load and discharge to the electric grid, during the highest priced time of use hours of the day.

16.    Additional Prescriptive Requirements for Newly Constructed Multifamily Mixed-Fuel Buildings:

A.    Insulation for a Heated Slab. Perimeter insulation for a heated slab shall be installed with an R-value equal to or greater than R-10 and shall comply with the requirements of Section 110.8(g).

B.    Compact Hot Water. The hot water distribution system shall be designed and installed to meet minimum requirements for the basic compact hot water distribution credit according to the procedures outlined in the 2019 Reference Appendices RA4.4.6.

C.    Central Fan Integrated Ventilation Systems. Central forced air system fans used to provide outside air, shall have an air-handling unit fan efficacy less than or equal to 0.35 W/CFM. The airflow rate and fan efficacy requirements in this section shall be confirmed through field verification and diagnostic testing in accordance with all applicable procedures specified in Reference Residential Appendix RA3.3. Central Fan Integrated Ventilation Systems shall be certified to the Energy Commission as Intermittent Ventilation Systems as specified in Reference Residential Appendix RA3.7.4.2.

D.    Energy Storage. A battery energy storage system with a capacity equivalent to the PV system shall be installed. The system shall have automatic controls programmed to have the ability to charge anytime PV generation is greater than the building load and discharge to the electric grid, during the highest priced time of use hours of the day.

(Ord. 7678-NS § 6 (part), 2019)