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.
A building complies with the performance standards if the energy consumption calculated 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.EXCEPTION to Section 150.1(b)1. A community shared solar electric generation system, or other renewable electric generation system, 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 and demand flexibility Energy Design Rating required to comply with the Standards, as calculated according to methods established by the Commission in the Residential ACM Reference Manual.
EXCEPTION to Section 150.1(b)3A: 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.
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. In TABLE 150.1-A, NA (not allowed) means that feature is not permitted in a particular climate zone and 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:NOTE: Low rise residential single- family buildings with the ducts and air handler located in the conditioned space, as specified by Section 150.1(c)9B, need only comply with insulation requirements of Option C.
EXCEPTION to Section 150.1(c)1C: Raised-floor insulation may be omitted if the foundation walls are insulated to meet the wall insulation minimums shown in TABLE 150.1-A, and a vapor retarder is placed over the entire floor of the crawl space, and the vents are fitted with automatically operated louvers, and the requirements of Reference Residential Appendix RA4.5.1 are met.
EXCEPTION to Section 150.1(c)1: The insulation requirements of Tables 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 1 to Section 150.1(c)3A: For each dwelling unit up to 3 square feet of new glazing area installed in doors and up to 3 square feet of new tubular skylights area with dual-pane diffusers shall not be required to meet the U-factor and SHGC requirements of TABLE 150.1-A.
EXCEPTION 2 to Section 150.1(c)3A: For each dwelling unit up to 16 square feet of new skylight area with a maximum U-factor of 0.55 and a maximum SHGC of 0.30.
EXCEPTION 3 to Section 150.1(c)3A: For fenestration containing chromogenic type glazing:
EXCEPTION 4 to Section 150.1(c)3A: For dwelling units containing unrated site-built fenestration that meets the maximum area restriction, the U-factor and SHGC can be determined in accordance with the Nonresidential Reference Appendix NA6 or use default values in TABLE 110.6-A and TABLE 110.6-B.
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.
EXCEPTION to Section 150.1(c)5: Swinging doors between the garage and conditioned space that are required to have fire protection are not required to meet the applicable door value in TABLE 150.1-A.
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 HERS Rater verification procedure in Reference Residential Appendix Section RA3.2.3.2. If the HERS Rater 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)7A: Packaged systems for which the manufacturer has verified correct system refrigerant charge prior to shipment from the factory are not required to have refrigerant charge confirmed through field verification and diagnostic testing. The installer of these packaged systems shall certify on the Certificate of Installation that the packaged system was pre-charged at the factory and has not been altered in a way that would affect the charge. Ducted systems shall comply with minimum system airflow rate requirements in Section 150.1(c)7Aib, provided that the system is of a type that can be verified using the procedure specified in Section RA3.3 or an approved alternative procedure in Section RA1.
EXCEPTION 1 to Section 150.1(c)8: For climate zones 3, 4, 13 and 14, a gas or propane instantaneous water heater with an input of 200,000 Btu per hour or less and no storage tank may be installed.
NOTE: The space conditioning system shall be a heat pump as specified in Section 150.1(c)6.
EXCEPTION 2 to Section 150.1(c)8: An instantaneous electric water heater with point of use distribution as specified in RA4.4.5 may be installed for new dwelling units with a conditioned floor area of 500 square feet or less.
EXCEPTION 3 to Section 150.1(c)8A and B: A 120V HPWH may be installed in place of a 240V HPWH for new dwelling unit with 1 bedroom or less.
NOTE: Gas heating appliances installed in conditioned spaces must meet the combustion air requirements of the California Mechanical Code Chapter 7, as applicable.
EXCEPTION to Section 150.1(c)10A: Gas furnace air-handling units manufactured prior to July 3, 2019 shall comply with a fan efficacy value less than or equal to 0.58 w/cfm as confirmed by field verification and diagnostic testing in accordance with the procedures given in Reference Residential Appendix RA3.3.
EXCEPTION 1 to Section 150.1(c)11: Building integrated photovoltaic panels and building integrated solar thermal panels are exempt from the minimum requirements for aged solar reflectance and thermal emittance or SRI.
EXCEPTION 2 to Section 150.1(c)11: Roof constructions with a weight of at least 25 lb/ft² are exempt from the minimum requirements for aged solar reflectance and thermal emittance, or SRI.
EXCEPTION to Section 150.1(c)12B: WHFs that are directly vented to the outside.
Exception to Section 150.1(c)12: New dwelling units with a conditioned floor area of 500 square feet or less shall not be required to comply with the WHF requirements.
All single-family residential buildings shall have a newly installed photovoltaic (PV) system or newly installed PV modules meeting the minimum qualification requirements specified in Joint Appendix JA11. The annual electrical output of the PV system shall be no less than the smaller of a PV system size determined using Equation 150.1-C, or the maximum PV system size that can be installed on the building’s Solar Access Roof Area (SARA).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 battery storage system. The battery storage system shall meet the qualification requirements specified in Joint Appendix JA12 and have a minimum usable capacity of 7.5 kWh
Single-Family | Climate Zone | ||||||||||||||||||
1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | ||||
Building Envelope Insulation | |||||||||||||||||||
Building Envelope | Roofs/Ceilings | Option B (meets 150.1(c)9A) | 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 |
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 | |||
Radiant Barrier | NR | REQ | REQ | NR | REQ | REQ | REQ | NR | NR | NR | NR | NR | NR | NR | NR | NR | |||
Option C (meets 150.1(c)9B) | Ceiling Insulation | R 38 | R 30 | R 30 | R 30 | R 30 | R 30 | R 30 | R 30 | R 30 | R 30 | R 38 | R 38 | R 38 | R 38 | R 38 | R 38 | ||
Radiant Barrier | NR | REQ | REQ | REQ | REQ | REQ | REQ | REQ | REQ | REQ | REQ | REQ | REQ | REQ | REQ | NR | |||
Walls | Above Grade | Framed3 | 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 | |
Mass Wall Interior4,5 | U 0.077 R 13 | U 0.077 R 13 | U 0.077 R 13 | U 0.077 R 13 | U 0.077 R 13 | U 0.077 R 13 | U 0.077 R 13 | U 0.077 R 13 | U 0.077 R 13 | U 0.077 R 13 | U 0.077 R 13 | U 0.077 R 13 | U 0.077 R 13 | U 0.077 R 13 | U 0.077 R 13 | U 0.059 R 17 | |||
Mass Wall Exterior4,5 | U 0.125 R 8.0 | U 0.125 R 8.0 | U 0.125 R 8.0 | U 0.125 R 8.0 | U 0.125 R 8.0 | U 0.125 R 8.0 | U 0.125 R 8.0 | U 0.125 R 8.0 | U 0.125 R 8.0 | U 0.125 R 8.0 | U 0.125 R 8.0 | U 0.125 R 8.0 | U 0.125 R 8.0 | U 0.125 R 8.0 | U 0.125 R 8.0 | U 0.077 R 13 | |||
Below Grade | Below Grade Interior6 | U 0.077 R 13 | U 0.077 R 13 | U 0.077 R 13 | U 0.077 R 13 | U 0.077 R 13 | U 0.077 R 13 | U 0.077 R 13 | U 0.077 R 13 | U 0.077 R 13 | U 0.077 R 13 | U 0.077 R 13 | U 0.077 R 13 | U 0.077 R 13 | U 0.077 R 13 | U 0.077 R 13 | U 0.067 R 15 | ||
Below Grade Exterior6 | U 0.200 R 5.0 | U 0.200 R 5.0 | U 0.200 R 5.0 | U 0.200 R 5.0 | U 0.200 R 5.0 | U 0.200 R 5.0 | U 0.200 R 5.0 | U 0.200 R 5.0 | U 0.200 R 5.0 | U 0.200 R 5.0 | U 0.200 R 5.0 | U 0.200 R 5.0 | U 0.200 R 5.0 | U 0.100 R 10 | U 0.100 R 10 | U 0.053 R 19 |
Climate Zone
| |||||||||||||||||||
1
|
2
|
3
|
4
|
5
|
6
|
7
|
8
|
9
|
10
|
11
|
12
|
13
|
14
|
15
|
16
| ||||
Building Envelope
|
Floors
|
Slab Perimeter
|
NR
|
NR
|
NR
|
NR
|
NR
|
NR
|
NR
|
NR
|
NR
|
NR
|
NR
|
NR
|
NR
|
NR
|
NR
|
U-0.58
R-7.0 | |
Raised
|
U- 0.037
R-19 |
U- 0.037
R-19 |
U- 0.037
R-19 |
U- 0.037
R-19 |
U- 0.037
R-19 |
U- 0.037
R-19 |
U- 0.037
R-19 |
U-0.037
R-19 |
U- 0.037
R-19 |
U- 0.037
R-19 |
U- 0.037
R-19 |
U- 0.037
R-19 |
U-0.037
R-19 |
U-0.037
R-19 |
U-0.037
R-19 |
U- 0.037
R-19 | |||
Concrete Raised
|
U 0.092
R-8.0 |
U 0.092
R-8.0 |
U 0.269
R-0 |
U 0.269
R-0 |
U 0.269
R-0 |
U 0.269
R-0 |
U 0.269
R-0 |
U 0.269
R-0 |
U 0.269
R-0 |
U 0.269
R-0 |
U 0.092
R-8.0 |
U 0.138
R-4.0 |
U 0.092
R-8.0 |
U 0.092
R-8.0 |
U 0.138
R-4.0 |
U 0.092
R-8.0 | |||
Quality Insulation Installation (QII)
|
Yes
|
Yes
|
Yes
|
Yes
|
Yes
|
Yes
|
Yes
|
Yes
|
Yes
|
Yes
|
Yes
|
Yes
|
Yes
|
Yes
|
Yes
|
Yes
| |||
Roofing Product
|
Low-Sloped
|
Aged Solar Reflectance
|
NR
|
NR
|
NR
|
NR
|
NR
|
NR
|
NR
|
NR
|
NR
|
NR
|
NR
|
NR
|
0.63
|
NR
|
0.63
|
NR
| |
Thermal Emittance
|
NR
|
NR
|
NR
|
NR
|
NR
|
NR
|
NR
|
NR
|
NR
|
NR
|
NR
|
NR
|
0.75
|
NR
|
0.75
|
NR
| |||
Steep-Sloped
|
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
| ||
Thermal Emittance
|
NR
|
NR
|
NR
|
NR
|
NR
|
NR
|
NR
|
NR
|
NR
|
0.75
|
0.75
|
0.75
|
0.75
|
0.75
|
0.75
|
NR
| |||
Fenestration
|
Maximum
U-factor |
0.30
|
0.30
|
0.30
|
0.30
|
0.30
|
0.30
|
0.30
|
0.30
|
0.30
|
0.30
|
0.30
|
0.30
|
0.30
|
0.30
|
0.30
|
0.30
| ||
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
|
0.23
|
0.23
|
NR
| |||
Maximum Total Area
|
20%
|
20%
|
20%
|
20%
|
20%
|
20%
|
20%
|
20%
|
20%
|
20%
|
20%
|
20%
|
20%
|
20%
|
20%
|
20%
| |||
Maximum West Facing Area
|
NR
|
5%
|
NR
|
5%
|
NR
|
5%
|
5%
|
5%
|
5%
|
5%
|
5%
|
5%
|
5%
|
5%
|
5%
|
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
|
Climate Zone
|
||||||||||||||||||||
1
|
2
|
3
|
4
|
5
|
6
|
7
|
8
|
9
|
10
|
11
|
12
|
13
|
14
|
15
|
16
|
|||||
HVAC System
|
Space Heating 9 |
Electric-Resistance Allowed
|
No
|
No
|
No
|
No
|
No
|
No
|
No
|
No
|
No
|
No
|
No
|
No
|
No
|
No
|
No
|
No
|
||
If gas, AFUE
|
MIN
|
MIN
|
NA
|
NA
|
MIN
|
MIN
|
MIN
|
MIN
|
MIN
|
MIN
|
MIN
|
MIN
|
NA
|
NA
|
MIN
|
MIN
|
||||
If Heat Pump, HSPF 7 /HSPF2
|
MIN
|
MIN
|
MIN
|
MIN
|
MIN
|
MIN
|
MIN
|
MIN
|
MIN
|
MIN
|
MIN
|
MIN
|
MIN
|
MIN
|
MIN
|
MIN
|
||||
Space Cooling
|
SEER/SEER2
|
MIN
|
MIN
|
MIN
|
MIN
|
MIN
|
MIN
|
MIN
|
MIN
|
MIN
|
MIN
|
MIN
|
MIN
|
MIN
|
MIN
|
MIN
|
MIN
|
|||
Refrigerant Charge Verification or Fault Indicator Display
|
NR
|
REQ
|
NR
|
NR
|
NR
|
NR
|
NR
|
REQ
|
REQ
|
REQ
|
REQ
|
REQ
|
REQ
|
REQ
|
REQ
|
NR
|
||||
Whole-house fan8
|
NR
|
NR
|
NR
|
NR
|
NR
|
NR
|
NR
|
REQ
|
REQ
|
REQ
|
REQ
|
REQ
|
REQ
|
REQ
|
NR
|
NR
|
||||
Central System Air Handlers
|
Central Fan Integrated Ventilation System Fan Efficacy
|
REQ
|
REQ
|
REQ
|
REQ
|
REQ
|
REQ
|
REQ
|
REQ
|
REQ
|
REQ
|
REQ
|
REQ
|
REQ
|
REQ
|
REQ
|
REQ
|
|||
Duct10
|
Roof/Ceiling Options B
|
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
|
||
§150.1(c)9A
|
NA
|
NA
|
NA
|
NA
|
NA
|
NA
|
NA
|
NA
|
NA
|
NA
|
NA
|
NA
|
NA
|
NA
|
NA
|
NA
|
||||
Roof/Ceiling Option C
|
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
|
|||
§150.1(c)9B
|
REQ
|
REQ
|
REQ
|
REQ
|
REQ
|
REQ
|
REQ
|
REQ
|
REQ
|
REQ
|
REQ
|
REQ
|
REQ
|
REQ
|
REQ
|
REQ
|
||||
Water Heating
|
All Buildings
|
System Shall meet Section 150.1(c)8
|
||||||||||||||||||
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-frame 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. Mass wall has a heat capacity greater than or equal to 7.0 Btu/h-ft 2. 5. “Interior” denotes insulation installed on the inside surface of the wall. “Exterior” denotes insulation installed on the exterior surface of the wall. 6. 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. 7. HSPF means "heating seasonal performance factor." 8. 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. 9. 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. 10. 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 HERS verification is required as specified by Reference Residential Appendix RA3.1.4.3.8. |
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.