Single-family residential buildings shall meet all of the following:Exception to Section 150.1(a)3: If a single contiguous subdivision or tract falls in more than one Climate Zone, all buildings in the subdivision or tract may be designed to meet the performance or prescriptive standards for the Climate Zone that contains 50 percent or more of the dwelling units.
Note: The Commission periodically updates, publishes, and makes available to interested persons and local enforcement agencies precise descriptions of the Climate Zones, as specified in Reference Joint Appendix JA2 – Weather/Climate Data.
Note: The requirements of Sections 150.0(a) through 150.0(r) apply to newly constructed buildings and Sections 150.2(a) and 150.2(b) specifies changes to the requirements of Sections 150.1(a) through 150.1(c) that apply to additions or alterations.
Exception to Section 150.1(b)2A: Multiple Orientation: A permit applicant may demonstrate compliance with the energy budget requirements of Section 150.1(a) and (b) for any orientation of the same building model if the documentation demonstrates that the building model with its proposed designs and features would comply in each of the four cardinal orientations.
Exception to Section 150.1(c)1: The insulation requirements of Table 150.1-A may also be met by ceiling, roof deck, wall, or floor assemblies that meet the required maximum U-factors using a U-factor calculation method that considers the thermal effects of all elements of the assembly and is approved by the Executive Director.
Exception to Section 150.1(c)4E: Where the California Building Code (CBC) requires emergency egress or where compliance would conflict with health and safety regulations.
Heating system types shall be installed as required in Table 150.1-A. The space conditioning system shall be a heat pump, or shall meet the performance compliance requirements of Section 150.1(b)1.Exception to Section 150.1(c)6: A supplemental heating unit may be installed in a space served directly or indirectly by a primary heating system, provided that the unit thermal capacity does not exceed 2 kW or 7,000 Btu/hr and is controlled by a time-limiting device not exceeding 30 minutes.
Exception to Section 150.1(c)7Aia: Systems that cannot conform to the specifications for hole location in Reference Residential Appendix Figure RA3.2-1, shall not be required to provide holes as described in Figure RA3.2-1.
Exception to Section 150.1(c)7Aib: Standard ducted systems without zoning dampers may comply with the minimum airflow rate by meeting the applicable requirements in Table 150.0-B or 150.0-C as confirmed by field verification and diagnostic testing in accordance with the procedures in Reference Residential Appendix Section RA3.1.4.4 and RA3.1.4.5. The design clean-filter pressure drop requirements of Section 150.0(m)12D for the system air filter device(s) shall conform to the requirements given in Table 150.0-B and 150.0-C.
Exception 1 to Section 150.1(c)7Aic: When the outdoor temperature is less than 55° F and the installer utilizes the weigh-in charging procedure in Reference Residential Appendix Section RA3.2.3.1 to verify the refrigerant charge, the installer may elect to utilize the verification procedure in Reference Residential Appendix Section RA3.2.3.2. If the verification procedure in Section RA3.2.3.2 is used for compliance, the system's thermostat shall conform to the specifications in Section 110.12. Ducted systems shall comply with minimum system airflow rate requirement in Section 150.1(c)7Aib.
Exception to Section 150.1(c)12B: WHFs that are directly vented to the outside.
a. Other state building code requirements, or
b. Local building code requirements if local building code requirements are confirmed by the Executive Director.
kWPV = (CFA × A)/1000 +(NDU × B)
Where:
kWPV = kWdc size of the PV system
CFA = Conditioned floor area
NDU = Number of dwelling units
A = CFA adjustment factor from Table 150.1-C
B = Dwelling unit adjustment factor from Table 150.1-C
Exception 1 to Section 150.1(c)14: For steep slope roofs, SARA shall not consider roof areas with a northerly azimuth that lies between 300 degrees and 90 degrees from true north. No PV system is required if the SARA is less than 80 contiguous square feet.
Exception 2 to Section 150.1(c)14: No PV system is required when the minimum PV system size specified by section 150.1(c)14 is less than 1.8 kWdc.
Exception 3 to Section 150.1(c)14: Buildings with enforcement-authority-approved roof designs, where the enforcement authority determines it is not possible for the PV system, including panels, modules and components and supports and attachments to the roof structure, to meet the requirements of the American Society of Civil Engineers (ASCE), Standard 7-16, Chapter 7, Snow Loads.
Exception 4 to Section 150.1(c)14: For buildings that are approved by the local planning department prior to January 1, 2020 with mandatory conditions for approval:
a. Shading from roof designs and configurations for steep-sloped roofs, which are required by the mandatory conditions for approval, shall be considered for the annual solar access calculations; and
b. Roof areas that are not allowed by the mandatory conditions for approval to have PVs, shall not be considered in determining the SARA.
Exception 5 to Section 150.1(c)14: PV system sizes determined using Equation 150.1-C may be reduced by 25 percent if installed in conjunction with a BESS. The BESS shall meet the qualification requirements specified in Joint Appendix JA12 and have a minimum usable capacity of 7.5 kWh as defined in Joint Appendix JA12.
15. Ventilation System Fault Indicator Display (FID): All HRV/ERV systems serving individual dwelling units shall have a Fault Indicator Display (FID) that is ECC-rater field verified as specified in Joint Reference Appendix JA17.
TABLE 150.1-A COMPONENT PACKAGE – Single-Family Standard Building Design
| Building Component Roofs and Ceilings | CZ 1 | CZ 2 | CZ 3 | CZ 4 | CZ 5 | CZ 6 | CZ 7 | CZ 8 | CZ 9 | CZ 10 | CZ 11 | CZ 12 | CZ 13 | CZ 14 | CZ 15 | CZ 16 |
| Option B⁴
Below Roof Deck Insulation¹,² (with Air Space) |
NR | NR | NR | R-19 | NR | NR | NR | R-19 | R-19 | R-19 | R-19 | R-19 | R-19 | R-19 | R-19 | R-19 |
| Option B⁵
Ceiling Insulation |
R-38 | R-38 | R-30 | R-38 | R-30 | R-30 | R-30 | R-38 | R-38 | R-38 | R-38 | R-38 | R-38 | R-38 | R-38 | R-38 |
| Option B⁴
Radiant Barrier |
NR | REQ | REQ | NR | REQ | REQ | REQ | NR | NR | NR | NR | NR | NR | NR | NR | NR |
| Option C⁴
Ceiling Insulation for Vented Attics |
R-38 | R-30 | R-30 | R-30 | R-30 | R-30 | R-30 | R-38 | R-38 | R-38 | R-38 | R-38 | R-38 | R-38 | R-38 | R-38 |
| Option C⁴
Radiant Barrier for Vented Attics |
NR | REQ | REQ | REQ | REQ | REQ | REQ | REQ | REQ | REQ | REQ | REQ | REQ | REQ | REQ | NR |
| Option C
Roof Deck Insulation for Cathedral Ceilings³,⁴ |
R-38 | R-38 | R-38 | R-38 | R-38 | R-38 | R-38 | R-38 | R-38 | R-38 | R-38 | R-38 | R-38 | R-38 | R-38 | R-38 |
| Low-Sloped Roofing Product
Aged Solar Reflectance |
NR | NR | NR | NR | NR | NR | NR | NR | NR | NR | NR | NR | 0.63 | NR | 0.63 | NR |
| Low-Sloped Roofing Product
Thermal Emittance |
NR | NR | NR | NR | NR | NR | NR | NR | NR | NR | NR | NR | 0.75 | NR | 0.75 | NR |
| Steep-Sloped Roofing Product
Aged Solar Reflectance |
NR | NR | NR | NR | NR | NR | NR | NR | NR | 0.20 | 0.20 | 0.20 | 0.20 | 0.20 | 0.20 | NR |
| Steep-Sloped Roofing Product
Thermal Emittance |
NR | NR | NR | NR | NR | NR | NR | NR | NR | 0.75 | 0.75 | 0.75 | 0.75 | 0.75 | 0.75 | NR |
| Building Component Roofs and Ceilings
Walls, Floors, Doors, Fenestrations, and QII |
CZ 1 | CZ 2 | CZ 3 | CZ 4 | CZ 5 | CZ 6 | CZ 7 | CZ 8 | CZ 9 | CZ 10 | CZ 11 | CZ 12 | CZ 13 | CZ 14 | CZ 15 | CZ 16 |
| Above Grade Framed Walls³ | U-0.048 | U-0.048 | U-0.048 | U-0.048 | U-0.048 | U-0.065 | U-0.065 | U-0.048 | U-0.048 | U-0.048 | U-0.048 | U-0.048 | U-0.048 | U-0.048 | U-0.048 | U-0.048 |
| Above Grade Masonry/
Mass Wall Interior⁴'⁵'⁶ |
U-0.077 | U-0.077 | U-0.077 | U-0.077 | U-0.077 | U-0.077 | U-0.077 | U-0.077 | U-0.077 | U-0.077 | U-0.077 | U-0.077 | U-0.077 | U-0.077 | U-0.077 | U-0.059 |
| R-13 | R-13 | R-13 | R-13 | R-13 | R-13 | R-13 | R-13 | R-13 | R-13 | R-13 | R-13 | R-13 | R-13 | R-13 | R-17 | |
| Above Grade Masonry/
Mass Wall Exterior⁴'⁵'⁶ |
U-0.125 | U-0.125 | U-0.125 | U-0.125 | U-0.125 | U-0.125 | U-0.125 | U-0.125 | U-0.125 | U-0.125 | U-0.125 | U-0.125 | U-0.125 | U-0.125 | U-0.125 | U-0.100 |
| R-8.0 | R-8.0 | R-8.0 | R-8.0 | R-8.0 | R-8.0 | R-8.0 | R-8.0 | R-8.0 | R-8.0 | R-8.0 | R-8.0 | R-8.0 | R-8.0 | R-8.0 | R-13 | |
| Below Grade Interior Walls⁷ | U-0.077 | U-0.077 | U-0.077 | U-0.077 | U-0.077 | U-0.077 | U-0.077 | U-0.077 | U-0.077 | U-0.077 | U-0.077 | U-0.077 | U-0.077 | U-0.077 | U-0.077 | U-0.067 |
| R-13 | R-13 | R-13 | R-13 | R-13 | R-13 | R-13 | R-13 | R-13 | R-13 | R-13 | R-13 | R-13 | R-13 | R-13 | R-15 | |
| Below Grade Exterior Walls⁷ | U-0.200 | U-0.200 | U-0.200 | U-0.200 | U-0.200 | U-0.200 | U-0.200 | U-0.200 | U-0.200 | U-0.200 | U-0.200 | U-0.200 | U-0.200 | U-0.100 | U-0.100 | U-0.053 |
| R-5.0 | R-5.0 | R-5.0 | R-5.0 | R-5.0 | R-5.0 | R-5.0 | R-5.0 | R-5.0 | R-5.0 | R-5.0 | R-5.0 | R-5.0 | R-10 | R-10 | R-19 | |
| Slab Perimeter Floors | NR | NR | NR | NR | NR | NR | NR | NR | NR | NR | NR | NR | NR | NR | NR | F-0.58 |
| Raised Floors | U 0.037 | U 0.037 | U 0.037 | U 0.037 | U 0.037 | U 0.037 | U 0.037 | U 0.037 | U 0.037 | U 0.037 | U 0.037 | U 0.037 | U 0.037 | U 0.037 | U 0.037 | U 0.037 |
| R 19 | R 19 | R 19 | R 19 | R 19 | R 19 | R 19 | R 19 | R 19 | R 19 | R 19 | R 19 | R 19 | R 19 | R 19 | R 19 | |
| Concrete Raised Floors | U 0.092 | U 0.092 | U 0.269 | U 0.269 | U 0.269 | U 0.269 | U 0.269 | U 0.269 | U 0.269 | U 0.269 | U 0.092 | U 0.138 | U 0.092 | U 0.138 | U 0.092 | U 0.092 |
| R 8.0 | R 8.0 | R 0 | R 0 | R 0 | R 0 | R 0 | R 0 | R 0 | R 0 | R 8.0 | R 4.0 | R 8.0 | R 4.0 | R 8.0 | R 8.0 | |
| Fenestration - Maximum U-factor** | 0.27 | 0.27 | 0.27 | 0.27 | 0.27 | 0.30 | 0.30 | 0.30 | 0.30 | 0.30 | 0.27 | 0.27 | 0.27 | 0.28 | 0.27 | 0.27 |
| Fenestration - Maximum SHGC | NR | 0.23 | NR | 0.23 | NR | 0.23 | 0.23 | 0.23 | 0.23 | 0.23 | 0.23 | 0.23 | 0.23 | 0.20 | NR | NR |
| Fenestration - Maximum Total Area | 20% | 20% | 20% | 20% | 20% | 20% | 20% | 20% | 20% | 20% | 20% | 20% | 20% | 20% | 20% | 20% |
| Fenestration - Maximum West Facing Area | NR | 5% | NR | 5% | NR | 5% | 5% | 5% | 5% | 5% | 5% | 5% | 5% | 5% | NR | NR |
| Door - Maximum U-Factor | 0.20 | 0.20 | 0.20 | 0.20 | 0.20 | 0.20 | 0.20 | 0.20 | 0.20 | 0.20 | 0.20 | 0.20 | 0.20 | 0.20 | 0.20 | 0.20 |
| Quality Insulation Installation | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
| Building Component Roofs and Ceilings HVAC and Water Heating Systems |
CZ 1 | CZ 2 | CZ 3 | CZ 4 | CZ 5 | CZ 6 | CZ 7 | CZ 8 | CZ 9 | CZ 10 | CZ 11 | CZ 12 | CZ 13 | CZ 14 | CZ 15 | CZ 16 |
| Space Heating - Electric Resistance Allowed | No | No | No | No | No | No | No | No | No | No | No | No | No | No | No | No |
| Space Heating - If gas, AFUE¹⁰ | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| Space Heating - If Heat Pump, HSPF²⁸ | MIN | MIN | MIN | MIN | MIN | MIN | MIN | MIN | MIN | MIN | MIN | MIN | MIN | MIN | MIN | MIN |
| Space Cooling -SEER² | MIN | MIN | MIN | MIN | MIN | MIN | MIN | MIN | MIN | MIN | MIN | MIN | MIN | MIN | MIN | MIN |
| Space Cooling - Whole-House Fan⁹ | NR | NR | NR | NR | NR | NR | NR | REQ | REQ | REQ | REQ | REQ | REQ | REQ | NR | NR |
| Refrigerant Charge Verification Air Conditioners | NR | REQ | NR | NR | NR | NR | NR | REQ | REQ | REQ | REQ | REQ | REQ | REQ | REQ | NR |
| Refrigerant Charge Verification Heat Pumps | REQ | REQ | REQ | REQ | REQ | REQ | REQ | REQ | REQ | REQ | REQ | REQ | REQ | REQ | REQ | REQ |
| Central Fan Integrated Ventilation System - Fan Efficacy | REQ | REQ | REQ | REQ | REQ | REQ | REQ | REQ | REQ | REQ | REQ | REQ | REQ | REQ | REQ | REQ |
| Option B¹³ - Roof/Ceiling - Duct Insulation | R-8 | R-8 | R-6 | R-8 | R-6 | R-6 | R-6 | R-8 | R-8 | R-8 | R-8 | R-8 | R-8 | R-8 | R-8 | R-8 |
| Option B¹³ - §150.1(c)9A Roof/Ceiling - Duct Insulation | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| Option C¹³⁰¹⁴ - Roof/Ceiling - Duct Insulation | R-6 | R-6 | R-6 | R-6 | R-6 | R-6 | R-6 | R-6 | R-6 | R-6 | R-6 | R-6 | R-6 | R-6 | R-6 | R-6 |
| Option C¹³⁰¹⁴ - §150.1(c)9B | REQ | REQ | REQ | REQ | REQ | REQ | REQ | REQ | REQ | REQ | REQ | REQ | REQ | REQ | REQ | REQ |
| PD required if HPWH/ERV Systems §150.1(c)8,§150.1(c)15 | REQ | REQ | REQ | REQ | REQ | REQ | REQ | REQ | REQ | REQ | REQ | REQ | REQ | REQ | REQ | REQ |
| Water Heating - §150.1(c)8 | REQ | REQ | REQ | REQ | REQ | REQ | REQ | REQ | REQ | REQ | REQ | REQ | REQ | REQ | REQ | REQ |
Footnote requirements to Table 150.1-A:
1. Install the specified R-value with an air space present between the roofing and the roof deck, such as standard installation of concrete or clay tile.
2. R-values shown for below roof deck insulation are for wood-framed construction with insulation installed between the framing members. Alternatives including insulation above rafters or above roof deck shall comply with the performance standards.
3. Assembly U-factors for exterior framed walls can be met with cavity insulation alone or with continuous insulation alone, or with both cavity and continuous insulation that results in an assembly U-factor equal to or less than the U-factor shown. Use Reference Joint Appendices JA4 Table 4.3.1, 4.3.1(a), or Table 4.3.4 to determine alternative insulation products to be less than or equal to the required maximum U-factor.
4. Assembly U-factors for roofs can be met with cavity insulation alone or with continuous insulation alone, or with both cavity and continuous insulation that results in an assembly U-factor equal to or less than the U-factor shown. Use Reference Joint Appendices JA4 Table 4.2.2 to determine alternative insulation products to be less than or equal to the required maximum U-factor. R-values shown represent the required insulation to meet the maximum U-factor with cavity insulation alone.
5. Mass wall has a heat capacity greater than or equal to 7.0 Btu/h-ft2.
6. “Interior” denotes insulation installed on the inside surface of the wall. “Exterior” denotes insulation installed on the exterior surface of the wall.
7. Below grade “interior” denotes insulation installed on the inside surface of the wall, and below grade “exterior” denotes insulation installed on the outside surface of the wall.
8. HSPF2 means heating seasonal performance factor.
9. When whole-house fans are required (REQ), only those whole-house fans that are listed in the Home Ventilating Institute Certified Products Directory may be installed. Compliance requires installation of one or more WHFs whose total airflow cfm is capable of meeting or exceeding a minimum 1.5 cfm/square foot of conditioned floor area as specified by Section 150.1(c)12.
10. A supplemental heating unit may be installed in a space served directly or indirectly by a primary heating system, provided that the unit thermal capacity does not exceed 2 kilowatts or 7,000 Btu/hr and is controlled by a time-limiting device not exceeding 30 minutes.
11. For duct and air handler location: REQ denotes location in conditioned space. When the table indicates ducts and air handlers are in conditioned space, a verification is required as specified by Reference Residential Appendix RA3.1.4.3.8.
12. New dwelling units with a conditioned floor area of 500 square feet or less in Climate Zone 5 may comply with a maximum U-factor of 0.30.
13. Option B meets §150.1(c)9A
14. Option C meets §150.1(c)9B
|
Climate Zone
|
A - CFA
|
B - Dwelling Units
|
|
1
|
0.793
|
1.27
|
|
2
|
0.621
|
1.22
|
|
3
|
0.628
|
1.12
|
|
4
|
0.586
|
1.21
|
|
5
|
0.585
|
1.06
|
|
6
|
0.594
|
1.23
|
|
7
|
0.572
|
1.15
|
|
8
|
0.586
|
1.37
|
|
9
|
0.613
|
1.36
|
|
10
|
0.627
|
1.41
|
|
11
|
0.836
|
1.44
|
|
12
|
0.613
|
1.40
|
|
13
|
0.894
|
1.51
|
|
14
|
0.741
|
1.26
|
|
15
|
1.56
|
1.47
|
|
16
|
0.59
|
1.22
|
Note: Authority: Sections 25213, 25218, 25218.5, 25402, 25402.1, and 25605, Public Resources Code. Reference: Sections 25007, 25008, 25218.5, 25310, 25402, 25402.1, 25402.4, 25402.5, 25402.8, 25605, and 25943, Public Resources Code.