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ENFORCEMENT REQUIREMENTS FOR DOCUMENTATION BY OTHERS Certificate of Installation. For all buildings, the person in charge of the construction or installation, who is eligible under Division 3 of the Business and Professions Code to accept responsibility for the construction or installation of features, materials, components, or manufactured devices regulated by Part 6 or the Appliance Efficiency Regulations (responsible person) shall sign and submit Certificate of Installation documentation as specified in Section 10-103(a)3 to certify conformance with Part 6. If more than one person has responsibility for the construction or installation, each person shall sign and submit the Certificate of Installation documentation applicable to the portion of the construction or installation for which they are responsible; alternatively, the person with chief responsibility for the construction or installation shall sign and submit the Certificate of Installation documentation for the entire construction or installation scope of work for the project, Subject to the requirements of Section 10-103(a)3, persons who prepare Certificate of Installation documentation (documentation authors) shall sign a declaration statement on the documents they prepare to certify the information provided on the documentation is accurate and complete. In accordance with applicable requirements of 10-103(a)3, the signatures provided by responsible persons and documentation authors shall be original signatures on paper documents or electronic signatures on electronic documents conforming to the electronic I signature specifications in Reference Joint Appendix JA7. Certificate of Field Verification and Diagnostic Testing (Certificate of Verification). For all buildings for which compliance requires ECC field verification, a certified ECC Rater shall conduct all required ECC field verification and diagnostic testing in accordance with applicable procedures specified in Reference Appendices RA2, RA3, NA1, and NA2. All applicable Certificate of Verification documentation shall be completed, signed, and submitted by the certified ECC Rater who performed the field verification and diagnostic testing services (responsible person) in accordance with the requirements of Section 10- 103(a)5, and Reference Appendices RA2, and NAI, to certify conformance with Part 6. If more -than one rater has responsibility for the ECC verification for the building, each rater shall sign and submit the Certificate of Verification documentation applicable to the portion of the building for which they are responsible. Subject to the requirements of Section 10-103(a)5, persons who prepare Certificate of Verification documentation (documentation authors) shall sign a declaration statement on the documents they prepare to certify the information provided on the documentation is accurate and complete. The signatures provided by responsible persons and documentation authors shall be electronic signatures on electronic documents. I . . Compliance, Operating, Maintenance, and Ventilation Information to be provided by Builder. 1. Compliance information. A. For low-rise residential buildings, at final inspection, the enforcement agency shall require the builder to leave in the building, copies of the completed, signed, and submitted compliance documents for the building owner at occupancy. For low-rise residential buildings, such information shall, at a minimum, include copies of all Certificate of Compliance, Certificate of Installation, and Certificate of Verification documentation submitted. These documents shall be in paper or electronic format and shall conform to the applicable requirements of Section 10-103(a). 2. Operating information. At final inspection, the enforcement agency shall require the builder to leave in the building, for the building owner at occupancy, operating information for all applicable features, materials, components, and mechanical devices installed in the building. Operating information shall include instructions on how to operate the features, materials, components, and mechanical devices correctly and efficiently. The instructions shall be consistent with specifications set forth by the Executive Director, For low-rise residential buildings, such information shall be contained in a folder or manual which provides all information specified in Section 10-103(b). This operating information shall be in paper or electronic format. For dwelling units, buildings or tenant spaces that are not individually owned and operated, or are centrally operated, such information shall be provided to the person(s) responsible for operating the feature, material, component or mechanical device installed in the building. This operating information shall be in paper or electronic format, 3. Maintenance information. At final inspection, the enforcement agency shall require the builder to leave in the building, for the building owner at occupancy, maintenance information for all features, materials, components, and manufactured devices that require routine maintenance for efficient operation. Required routine maintenance actions shall be clearly stated and incorporated on a readily accessible label. The label may be limited to identifying, by title and/or publication number, the operation and maintenance manual for that particular model and type of feature, material, component or manufactured device. For Low-rise residential buildings, this information shall include a schedule of all interior luminaires and lamps installed to comply with Section 150.0(k). This information shall be in paper or electronic format, 4. Ventilation information. A. For low-rise and high-rise residential buildings, the enforcement agency shall require the builder to leave in the following information in the building, for the building owner at occupancy: 1. A description of the quantities of outdoor air that the whole -dwelling unit ventilation system(s) are designed to provide to the building's conditioned space, and instructions for proper operation and maintenance of the ventilation system. ii. Instructions for proper operation and maintenance of local exhaust systems, including instructions for conditions for which � any occupant -controlled systems such as kitchen range hoods and bathroom exhaust fans should be used. For buildings or tenant spaces that are not individually owned and operated, or are centrally operated, Compliance, Operating, Maintenance & Ventilation information shall be provided to the person(s) responsible for operating and maintaining the feature, material, component or mechanical ventilation device installed in the building. � I . � I I I ' INDOOR AIR QUALITY AND MECHANICAL VENTILATION §150.0(o): Requirements for Ventilation and Indoor Air Quality. All dwelling units shall meet the requirements of ASHRAE Standard 62.2, Ventilation and Acceptable Indoor Air Quality in Residential Buildings subject to the amendments specified in Section 150,0(o)l below. All dwelling units shall comply with Section 150.0(o)2 below. §150.0(o)l. Amendments to ASHRAE 62.2 requirements. A. Window operation is not a permissible method of providing the dwelling unit ventilation airflow specified in Section 150.0(o)lc. B. Continuous operation of central forced air system air handlers used in ventilation systems is not a permissible method of providing the dwelling unit ventilation airflow required in Section 150.0(o)1C. C. Single family detached dwelling units, and attached dwelling units not sharing ceilings or floors with other dwelling units, occupiable spaces, public garages, or commercial spaces shall have mechanical ventilation airflow as specified in subsections i, ii, and iii. D. Air filtration shall conform to the specifications in Section 150.0(m)12. Compliance with ASHRAE 62.2 Sections 6.7 (Minimum Filtration) and 6.7.1 (Filter Pressure Drop) shall not be required. E. Reserved. F. Reserved. G. A local mechanical exhaust system shall be installed in each kitchen and bathroom. Systems shall be rated for airflow in accordance with ASHRAE 62.2 Section 7.1 and shall be rated for sound in accordance with Section 7.2 of AHRAE 62.2 at no less than the minimum airflow rate required by Section 150.0(o)lGi, ii, iii, iv, v and vi. H. The airflow required by Section 150.0(o)l C is the quantity of outdoor ventilation air supplied or indoor air exhausted by the mechanical . ventilation system as installed and shall be measured by using a flow hood, flow grid or other airflow measuring device at the mechanical ventilation fan's inlet term inals/gri Iles or outlet terminals/grilles in accordance with the procedures in Reference Residential Appendix RA3.7. Balanced mechanical ventilation system airflow shall be the average of the supply fan and exhaust fan flows. 1. Dwelling unit ventilation systems shall be rated for sound in accordance with Section 7.2 of AHRAE 62.2 at no less than the minimum airflow rate required by Section 150.0(o)1C. J� Compliance with AHSRAE 62.2 Section 4.4 (Control and Operation) shall require manual ON -OFF control switches associated with whole - dwelling unit ventilation systems to have a label clearly displaying the following text, or equivalent text: "This switch controls the indoor air quality ventilation for the home. Leave switch in the 'on' position at all times unless the outdoor air quality is very poor. K. All dwelling units shall conform to the applicable requirements specified in California Mechanical Code Chapter 7, Combustion Air and shall conform to the requirements in AHRAE 62.2 Section 6.4, Combustion and Solid -Fuel -Burning Appliances. §150.0(o)2. Field Verification and Diagnostic Testing. A.Airflow Performance. The dwelling unit ventilation airflow required by Sections 150.0(o)IC shall be confirmed through field verification and diagnostic testing in accordance with the applicable procedures specified in Reference Residential Appendix RA3.7. Balanced mechanical ventilation system airflow shall be the average of the supply fan and exhaust fan flows. Ventilation airflow of systems with multiple operating modes shall be tested in all modes designed to comply with the required ventilation airflows. B. Kitchen Range Hoods. Vented range hoods installed to comply with local mechanical exhaust requirements specified in Section 150.0(o)l G shall be field verified in accordance with the procedures in Reference Residential Appendix RA3.7.4.3 to confirm the model is rated by HVI or AHAM to comply with the following requirements i. The minimum ventilation airflow rate as specified by Section 150,0(o)1G, or alternatively the minimum capture efficiency as specified by Section 150.0(o)IG. I ii. The maximum sound rating as specified in Section I 50. 0(o) 1 Gvi. C. Heat Recovery Ventilation (HVR) and Energy Recovery Ventilation (ERV) System Fan Efficacy. Systems with heat or energy recovery serving a single dwelling unit shall have a fan efficacy of <1.0 w/cfm as confirmed by ECC field verification in accordance with Reference Appendix RA3.7.4.4. §1 50.2(a)l C and §1 50.2(a)2C: Mechanical Ventilation for Indoor Air Quality for Additions. b. Additions to an existing dwelling unit that increase the conditioned floor area of the existing dwelling unit by more than 1,000 square feet shall have mechanical ventilation airflow in accordance with Sections 150.0(o)l C, 150.0(o)l E, or 150.0(o)l F as applicable. The dwelling unit mechanical ventilation airflow rate shall be based on the conditioned floor area of the entire dwelling unit comprised of the existing dwelling unit conditioned floor area plus the addition conditioned floor area. c. New dwelling units that are additions to an existing building shall have mechanical ventilation airflow provided in accordance with Sections 150.0(o)l C, 150.0(o)l E, or 1 50.0(o)l F as applicable. The mechanical ventilation airflow rate shall be based on the * conditioned floor area of the new dwelling unit. The following summarizes the key requirements for most newly constructed residences. I . A dwelling unit mechanical ventilation system shall be provided. The Airflow rate provided by the system shall be confirmed through field verification and diagnostic testing in accordance with the applicable procedures specified in Reference Residential Appendix RA33 2. Kitchens and bathrooms shall have local exhaust systems vented to the outdoors. 3. Clothes dryers shall be vented to the outdoors. 4. Ventilation air shall come from the outdoors and shall not be transferred from adjacent dwelling units, garages, unconditioned attics or crawlspaces. 5. Ventilation system controls shall be labeled and the home owner shall be provided with instructions on how to operate the system. 6. Combustion appliances shall be properly vented and air systems shall be designed to prevent back drafting. 7. The walls and openings between the house and the garage shall be sealed or gasketed. 8. Habitable rooms shall have windows with a ventilation area of at least 4 percent of the floor area. 9. Mechanical systems including heating and air-conditioning systems that supply air to habitable spaces shall have MERV 13 filters or better and be designed to accommodate the system's air filter media rated pressure drop for the system design airflow rate. 1 0. Dedicated air inlets (not exhaust) that are part of the ventilation system design shall be located away from known contaminants. I 1. A carbon monoxide alarm shall be installed in each dwelling unit in accordance with NFPA 720. 12.Air-moving equipment used to meet the dwelling unit ventilation requirement and the local ventilation exhaust requirement shall be rated in terms of airflow and sound: a. Dwelling unit ventilation and continuously operating local exhaust fans must be rated at a maximum of 1.0 sone (measure of sound). b. Demand -controlled local exhaust fans must be rated at a maximum of 3.0 sone. c. Kitchen exhaust fans must be rated at a maximum of 3.0 sone at one or more airflow settings greater than or equal to 1 00 CFM. d. Remotely located air -moving equipment (mounted outside habitable spaces) are exempt from the sound requirements provided there is at least 4 feet of cluctwork between the fan and the interior grille. . . I I..'' . .1. . . � � . I I- . . I . Dwelling Unit Mechanical Ventilation Calculation (Continuous Fan or Indoor Air Quality (IAQ) Fan) Each dwelling unit mechanical ventilation system must meet the minimum CFM required from the CF1 R and field verified with diagnostic testing of airflow performance. In addition, the fan must be certified with a maximum sone rating of 1.0 or less. New Accessory Dwelling Unit Behind Garage = 24 CFM / 160.0(n) WATER HEATING SYSTEM. 1. Systems using gas or propane water heaters to serve individual dwelling units shall designate a space at least 2.5 feet by 2.5 feet wicli:a and 7 feet tall suitable for the future installation of a heat pump water heater (HPWH) by meeting either A or 6 below. All electrical components shall be installed in accordance with the California Electrical Code: A. If the designated space is within 3 feet from the water heater, then this space shall include the following: i. A dedicated 'I 25 volt, 20 amp electrical receptacle that is connected to the electric panel with a 120/240 volt 3 conductor, brarch circuit rated at 30 amps minimum, within 3 feet from the water heater and accessible to the water heater with no obstructions; and ii. Both ends of the inused conductor shall be labeled with the word "spare" and be electrically isolated; and iii. 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"; and iv. A condensate dmin that is no more than 2 inches higher than the base of the installed water heater, and allows natural draining without pump assistance, B. If the designated space is more than 3 feet from the water heater, then this space shall include the following: i. A dedicated :240volt branch circuit shall be installed within 3 feet from the designated space. The branch circuit shall be ra,:ed at 30 amps minimum. The blank cover shall be identified as "240V ready"; and ii, The main elec.trical service panel shall have a reserved space to allow for the installation of a double pole circuit breaker for a future HPWH installation. The reserved space shall be permanently marked as "For Future 240V use"; and iii. Either a dedicated cold water supply, or the cold water supply shall pass through the designated HPWH location just before reaching the gas or propane water heater; and iv. The hot water supply pipe coming out of the gas or propane water heater shall be routed first through the designated FIPWH location before serving any fixtures; and v. The hot and cold water piping at the designated HPWH location shall be exposed and readily accessible for � future installation of an HPWH; and � vi. condensate drair that is no more than 2 inches higher than the base of the installed water heater, and allows natural.draining without pump assistance. 2. Solar water -heating systems and collectors shall be certified and rated by the Solar Rating and Certification Corporation (SRCO), tie 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. 3. Instantaneous water heaters with an input rating greater than 6.8 kBTU/hr (2kW) shall meet the requirements of Section 110.3(c)6. Table 4-9: De nia nd -Controlled Local Ventilation Exhaust Airflow Rates (From Table 150.0-E) Application Airflow Enclosed 11 Vented range hood (including appliance range hood combinations): capture efficiency or Kitchen airflow rate specified in Table 4-10: Demand -Controlled Local Ventilation Exhaust Airflow R3tes (from Table 150.0). 11 Other kitchen exhaust fans, including downdraft: 300 CFM (150 L/s) Non- 11 Vented range hood (including appliance range hood combinations): capture efficiency or Enclosed airflow rate specified in Table 4-10. Kitchen 11 Other kitchen exhaust fans, including clowndraft: 300 CFIVI (150 L/s) Bathroom 1� 53 CFIVI (25 L/s) I Table 4-10�: Demand -Controlled Local Ventilation Exhaust Airflow Rates (from Table 150.0-G) Dwelling Unit Floor Area (ft') I Hood Over Electric Range Hood Over Gas Range >1500 50% CE or 110 Cfm 70% CE or 180 cfm >1000 - 1500 50% CE of 110 cfm 80% CE or 250 cfm - 750 - 1000 55% CE or 130 cfrn 85% CE or 280 cfm <750 __�__ 1 65% CE or 160 cfm 85% CE or 280 cfm The Energy Code requires verification that range hoods are HVI or AHAM-certified with at least one speed setting that can deliver at least 100 CFM at 3 sones or less. Verification must be in accordance with the procedures in RA3.7.4.3 and have a minimum airflow setting exceeding 400 CFM are exempt from the noise requirement. Table 150.0-H Prescriptive Ventilation System Duct Sizing [ASHRAE 62.2:Table 5-3] - Fan Airflow Rating, drn at minimum static FireSSLire 550 0.25 in. waterf (25) (40) (50) (60) (70) (85) (95) (120) (165) (190) (210) (330) (380) (L/s at minimum 62.5 Pal Minimum Duct Diameter 4 5 5 6 6 7 7 8 9 10 10 12 12 in. (mm) For Rigid cluct (100), (125) (125 , (150) (150) (180) (180) (205) (230) (255), (255) (305) (305), - Minimum Duct Diameter r�- 4 5 6 6 7 7 8 8 9 10 r in. (mm) For Flex duct (100) (125) (150)� (150) (150) (180) (205) (205) (230) (25 5) NP NP __ N�P c. Use of this table for verification of flex duct systems requires flex duct to be fully extended and any flex duct elbows to have a minimum bend radius to duct diameter ratio of 1.0. f. When a vented range hood utilizes a capture efficiency rating to demonstrate compliance with 150.0(o)lGllib, a static pressure greater than or equal to 0.25 in. of water at the rating point shall not be required, and the airflow listed in the approved directory corresponding to the compliant capture efficiency rating point shall be applied to Table 1.50.0-H for determining compliance. EqUIPMFEMT(op t=-c�u-&,L-) AOU . AIR V4ANDLF-R 2,1-0R. 59F-(�O- AFuF_/"-_,PF: Cmiw) 8.1 11*79r- LOW LE.&K/-�,CIP_ A-H. "/FZ . FAt-A W.AZTT 0PAW " f P� \/EIZI F=IEU. At RFLOW " 19- . CON10E-f4SER E3X-01R. SPEC-'0- 5FF=-V,_/1E-ETZ ,cmlv,�,, 114.0 /10-0 . -rc:+-3,:�? " 11Z . v5r2tF=ieo EFFIC_ rZeF rZIC'. C_HA-9_CJ1E N I iz- I . WA-Tl-=IZ 14FEAT02 VAE:A�zv Pot--vP I . C,At_LC:)r-4C7 LAO . E7T\.) �A I " F'UT S S F_� c-r- - I rL RECONJI��_Y EF:F)C-. N /A . ST'it, . 1,io- B-f- 1_04,A, " JA� F_"F_V2e,Y FP,C7'Q;1V_ 1-1 E-17- LA F-IV-ST V4�Z.r�-ATI"6, &0*' r-,A%-- HOT 47_0 12%?e "�,_ R.E.Q. ID. VAVAc_ VU C'T I N1c2UL 1,10 ouc_Tc., HVAC DUOT * "I 6tH-T --;,ET f3ACY- _rHEFfZM0'1_F-&-_r k'��V112F-V -* vV=_1ZkT=y sok)"D C)�ZVIt__4A"CS (Iv= b,"-f) pp-lorz -T,O z,,)c SST ' Nf V4 . *%1',&,C- F_R%JJFME�"-T S-:,177_1Wq 4 5F-EC,1P%C,1-N_,rk011AC�7 E5Y OT-tAETZ-2 Prior to final inspection an electronically signed and registered copy of the following chec ked CF2R & CF3R installation certificates and verification/diagnostic testing certificates shall be posted and made available to the enforcernent agency. Verification - Installation -_ --- Certificate Certificate Document Category Document CF.-,;R(ECC) CF2R Category Description Description Envelope ____ x ENV-01 Non ECC Fenestration/Glazing Envelope X ENV-03 Non ECC Insulation Installation Envelope - Roofing - Ventilation x ENV-04 Non ECC Cool Roof or Radiant Barrier (if Required) Envelope Building Envelope Air Leakage ENV-20H ECC Blower Door Test ENV- Envelope - 21H-22H ECC Quality Insulation Installation (oil) Lighting . X LTG-01 Non ECC -_ Single Family Lighting Lighting LTG-02 Non ECC Multi -Family Lighting Mechanical HVAC Systems & Ducts x MCH-01 Non ECC Return Air Filter Labeling Mechanical Duct Leakage Test MCH-20H ECC Low Leakage Air Handier (LLAH) Mechanical Duct Location , MCH-21H ECC Conditioned Space Mechanical MCH-22H ECC Fan Watt Draw Efficacy (FWD) Mechanical Cooling Coil Airflow (CCA) MCH-23H ECC (350 CFMfron) Mechanical MCH-25H , ECC Refrigerant Charge Verification Mechanical Heat/Pump Capacity x x MCH-26H ECC SEER & EER & HSPF Verification - Mechanical Indoor Air Quality & Mechanical Ventilation X x MCH-27H ECC ASHRAE 62.2 (Continuous Fan) Mechanical Supply Duct Surface Area, MCH-29H ECC R-Value & Buried Ducts Mechanical MCH-02 Non ECC Whole House Fan MCH-31 H I ECC - Mechanical x x MCH-32H ECC - --- ___ Local Mechanical Exhaust --- - Plumbing PLB-01 Non ECC PLB-21 H ECC Multi -Family Hot Water Distribution System Plumbing x PLB-02 Non ECC X I PLB-22H I ECC I Single Family Hot Water Distribution System t � 1VB-0 1 1 Solar Solar Photovoltaic System IVB-02 I Non EC C I - Solar Battery Storage SUPERINTENDENTS Please coordinate with the subcontractors and ECC rater the importance of having the above checked certificates filled out on time to prevent any hold-ups during final inspection. The Certificate of Occupancy will not be issued until the CF2R & CF3R certificates are reviewed and approved by the enforcement agency. Keep in mind that some of these items need to be inspected by the ECC rater prior to drywall. 2025 Single -Family Residential Mandatory Requirements Summary NOTE: Single-family residential buildings subject to the Energy Code must comply with all applicable mandatory measures, regardless of the compliance approach used. Review the respective sections for more information. � . n ---- �__A;1:__:__ uu_�_ u-'C_ -I 011k; cl_f ___ ____.______ § 11 0.0-1 10.3: _ _ . -1-1 ___ � - .� I ____ -_ Certification. Heating, ventilation, an air o it oning ).equoment, water heaters, and all othe regulated appliances must be certified by the manulacturer to t he California Energy Commission. - - § 110.2(a): - . * HVAC Efficiency. Equipment must meet the applicable efficiency requirements in Tables 110.2-A through -L. Controls for Heat Pumps vv[th Supplementary Heaters. Heat pumps with supplementary heaters must have control requirements § 110.2(b): * as specified in § 150.0(h)7 and § 150.0(i)2. ._. Thermostats. All heating or cooling systems not controlled by a central energy management control system (EMCS) must have a § 110.2(c): setback thermostat. * - Insulation. Unfired service water heater storage tanks and solar water -heating backup tanks must have adequate insulation, or tank § 110.3(c)3: surface heat loss rating. - __ Isolation Valves. Instantaneous water heaters with an input rating greater than 6.8 kBtu per hour (2 kW) must have isolation valves with § 110.3(c)6: hose bibbs or other fittings on both cold and hot water lines to allow for flushing the water heater when the valves are closed. Backup Heat and Ventilation. Air -source heat pump water heaters must have backup heat (internal or external) if inlet air is §1 10.3(c)7: unconditioned, unless compressor cut-off temperature is below Heating Winter Median of Extremes from Reference Appendix JA2. Heat pump water heater installation space and/or communicating space(s) must meet minimum volume, ducting, and/or grille net free area by kBtu/h of compressor capacity. - Pilot Lights. Continuously burning pilot lights are prohibited for natural gas: fan -type central furnaces; household cooking appliances * § 110.5: (except appliances without electrical supply voltage connection with pilot lights that consume less than 150 Btu/h); pool and spa heaters. Building Cooling and Heating Loads. Heating and/or cooling loads are calculated in accordance with the ASHRAE Handbook, § 150.0(h)l: Equipment Volume, Applications Volume, and Fundamentals Volume; the SMACNA Residential Comfort System Installation Standards Manual; or the ACCA Manual J using design conditions specified in § 1.50.0(h)2. * - . § 150.0(h)3A: ) tj Clearances. Air conditioner and heat pump outdoor condensing units must have a clearance of at I�ast five feet from any dryer outlet or vent. Liquid Line Drier. Air condiflon-ers and heat pump systems must be equipped with liquid line filter driers if required, as specified by the § 150.0(h)3B: manufacturer's instructions. System Selection. Equipment sizing and selection must meet the cooling and heating loads of § 150.0(h)l & 2, and systems must be § 150.0(h)5: , sized per ACCA Manual S-2023 with no minimum cooling capacity. Furnace heating capacity must meet ACCA Manual S. Heat pump heatinq capacity must meet minimum CBC requirements without including supplementary heat with no limit on maximum heating capacity. - § 150.0(h)6: Defrost. Installer -adjustable defrost delay timers must be set to greater than or equal to 90 minutes, CF2R certification required. * ,__ Supplementary Heating Control Configuration: Heat pumps with supplementary heating must have controls to lock supplementary § 150.0(h)7: heating above outside air temperature no greater than 35'F, allowed during defrost or emer encyl operation. CF2R certification required. * Sizing of Electric Resistance Supplementary Heat: When heat pumps have electric resistance heat, the capacity of electric resistance § 150.0(h)8: heat must not exceed the heat pump nominal cooling capacity (at 95*F ambient conditions) multiplied by 2.7 kW per ton, rounded up to the closest kW. Capacity Variation with Third -party Thermostats: For variable or multi -speed systems, the space conditioning system and thermostat § 150.0(h)9: must be capable of responding to heating and cooling loads by modulating system compressor speed and must meet thermostat requirements of § 150,010 CF2R certification required. . � Thermostat. All heating or cooling systems including heat pumps which are not controlled by energy management control system (EMCS) must have setback thermostat. Additional requirements for thermostats that control heat pumps with supplemental heating include § 150.0(i): thermostat must display outdoor air temperature, must lock out supplementary heat when outdoor air temperature is above 35*F, and must notify when supplemental heat is in use.* Water Piping, Solar Water -heating System Piping, and Space Conditioning System Line Insulation. All domestic hot water § 150.0(j)l: piping must be insulated as specified in § 609.12 of the California Plumbing Code. * I Insulation Protection. Piping insulation must be protected from damage, including from sunlight, moisture, equipment maintenance, and wind, as required by §1 20.3(b). Insulation exposed to weather must be water retardant and protected from UV light (no adhesive tapes). § 150.0(j)2: Insulation covering chilled water piping and refrigerant suction piping located outside the conditioned space must include, or be protected b . a Class I or 11 vapor retarder. Pipe insulation buried below grade must be installed in a waterproof and non -crushable casing or sleeve. Gas or Propane Water Heating Systems. Systems using gas or propane water heaters to serve individual dwelling units must § 150.0(n)1: designate a space at least 25 x 25 x 7' suitable for the future installation of a heat pump water heater, and meet electrical and plumbing requirements, based on the distance between this designated space and the water heater location; and a condensate drain no more than . 2" higher than the base of the water heater Solar Water Heating Systems. Solar water heating systems and collectors must be certified and rated by the Solar Rating and § 150.0(n)2: 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. I I r% _�_ 4 1: --- - ___ -.,- . Ducts. Insulation installed on an existing space -conditioning duct must comply with § 604.0 of the California Mechanical Code (CMC). If §1 10.8(d)3: a contractor installs the insulation, the contractor must certify to the customer, in writing, that the insulation meets this requirement. - CMC Compliance. All air -distribution system ducts and plenums must meet CMC §§ 601.0-605.0 and ANSI/SMACNA-006-2006 HVAC Duct Construction Standards Metal and Flexible 3rd Edition. Portions of supply- and return -air ducts and plenums must be insulated to R-6.0 or higher. Ducts located entirely in conditioned space as confirmed via field verification and diagnostic testing (RA3.1.4.3.8) do not § 150.0(m)l -. require insulation: in dwelling units with attics, the ducts must be below the ceiling separating occupiable space from the attic. Connections of metal ducts and inner core of flexible ducts must be mechanically fastened. Openings mus't be sealed with mastic, tape, or other duct -closure system that meets applicable UL requirements; or aerosol sealant that meets UL 723. The combination of mastic and either mesh or tape must be used to seal openings greater than I/,", if mastic or tape is used. Building cavities, air handier support ___ platforms, and plenums designed or constructed with materials other than sealed sheet metal, duct board or flexible duct must not be used to convey conditioned air. Building cavities and support platforms may contain ducts; ducts installed in these spaces must not be I compress d. * . � Factory- Fabricated Duct Systems must comply with applicable requirements of LIL 181 for duct construction, connections, and § 150.0(m)2: closures; joints and seams of duct systems and their components must not be sealed with cloth back rubber adhesive duct tapes unit.. such tape is used in combination with mastic and draw bands. Field -Fabricated Duct Systems must comply with applicable requirements for: pressure -sensitive tapes, mastics, sealants, and other § 150.0(m)3: requirements specified for duct construction. § 150.0(m)7: Backdraft Damper. Fan systems that exchange air between conditioned space and outdoors must have backdraft or automatic dampers. Gravity Ventilation Dampers. Gravity ventilating systems serving conditioned space must have either automatic or readily accessible, § 150.0(M)8: manually operated dampers in all openings to the outside, except combustion inlet and outlet air openings and elevator shaft vents. I Protection of Insulation. Insulation must be protected from damage due to sunlight, moisture, equipment maintenance, and wind. § 150,0(m)9: Insulation exposed to weather must be suitable for outdoor service (e.g., protected by aluminum, sheet metal, painted canvas, or plastic cover). Cellular foam insulation must be protected as above or painted with a water retardant and solar radiation -resistant coating. Porous Inner Core Flex Duct. Flex ducts with porous inner cores must have a non -porous layer or air barrier between the inner core § 150.0(m)10: and outer vapor barrier. Duct System Sealing and Leakage Test. When space conditioning systems use forced air duct systems to supply conditioned air to an § 150.0(m)l 1: occupiable space, the ducts must be sealed and duct leakage tested, as confirmed through field verification and diagnostic testing, in accordance with Reference Residential Appendix RA3.1. Air Filtration. Space conditioning systems with ducts exceeding 10 feet and the supply side of ventilation systems must have MERV 13 or equivalent filters. Filters for space conditioning systems must have a two inch depth, or can be one inch if sized per Equation 150.0-A. § 150.0(m)12: Clean -filter pressure drop and labeling must meet the requirements in §1 50.0(m)12. Filters must be accessible for regular service. Filter racks or grilles must use gaskets, sealing, or other means to close gaps around the inserted filters and prevents air from bypassing the filter. * Space Conditioning System Airflow Rate and Fan Efficacy. Space conditioning systems that use ducts to supply cooling must have a hole for the placement of a static pressure probe, or a permanently installed static pressure probe in the supply plenum. Airflow, must § 150.0(m)13: be ��, 350 CFM per ton of nominal cooling capacity, and an air -handling unit fan efficacy !� 0.45 watts per CFM for gas furnace air handlers and :5 0.58 watts per CFM for all others. Small duct high velocity systems must provide an airflow;�! 250 CFM per ton of nominal cooling capacity, and an air -handling unit fan efficacy 15; 0.62 watts per CFM, Field verification testing is required in accordance I with Reference Residential Appendix RA3.3. * I V__&;1".__ -A I�A A;� f)-likv . _.._1.____ _ ___ - - . - - I I . Requirements for Ventilation and Indoor Air Quality. All dwelling units shall meet the requirements of ASHRAE Standard 62.2, § 150.0(o)l: Ventilation and Acceptable Indoor Air Quality in Residential Buildings subject to the amendments specified in §150.0(o)l. * Central Fan Integrated (CFI) Ventilation Systems. Continuous operation of CFI air handlers used in CFI systems is not a permissible § 1 50. 0(o) I B: method to provide whole -dwelling unit ventilation airflow required per §150.0(o)1C. A motorized damper(s) shall be installed on the ventilation duct(s) that prevents all airflow through the space conditioning duct system when the damper(s) is closed and controlled per §150.0(o)1Biii&iv. CH ventilation systems must have controls that track outdoor air ventilation run time, and either open or close the � motorized damper(s) for compliance with §150.0(o)1C. Whole -Dwelling Unit Mechanical Ventilation for Single -Family dviellings. Single-family dwellings shall have mechanical ventilation § 150.0(o)lC: specified in §150.0(o)lCi and 150.0(o)lCiv.Single family detached dwelling units and attached dwelling units not sharing ceilings or floors with other dwelling units, occupiable spaces, public garages, or commercial spaces may reduce their required mechanical ventilation rates in accordance with §1 50.0(o)l Cii-iii.* Vertically attached dwelling units shall not reduce their minimum ventilation rates in accordance with §1 50,0(o)l Cii-iii. § 150.0(o)lG: Local Mechanical Exhaust. Kitchens and bathrooms shall have local mechanical exhaust; nonenclosed kitchens shall have demand - controlled exhaust system meeting requirements of §150.0(o)lGiii, enclosed kitchens and bathrooms shall either use demand - controlled as specified in §150.0(o)lGiii or continuous exhaust as specified in §150.0(o)lGiv. Airflow shall be measured by the installer per §150.0(o)lGv, and rated for sound per§150.0(o)1Gvi. * § 150.0(o)lH-J: . .___ Airflow Measurement, Sound Ratings, Label of Whole -Dwelling Unit Ventilation Systems. The airflow required per §150.0(o)lC shall be measured by using a flow hood, flow grid, or other airflow measuring device at the fan's inlet or outlet terminals/grilles per Reference Residential Appendix RA3.7. Whole -Dwelling unit ventilation systems shall be rated for sound per ASHRAE 62.2 §7.3 at no less than the minimum airflow rate required by §150.0(o)IC. Manual on -off switches must be labeled per§150.0(o)1J. Field Verification and Diagnostic Testing. Whole -Dwelling Unit ventilation airflow, vented range hood airflow and sound rating, and HRV § 150.0(o)2-. and ERV fan efficacy shall be verified in accordance with Reference Residential Appendix RA3.7, Vented range hoods shall be verified per Reference Residential Appendix RA3.7.4.3 to confirm if it is rated by HVI or AHAM to comply with the airflow rates and sound requirements - per §1 50,0(o)l G , Plantrii- 2nrl Anttary FnArriv.Rlinrano Poidw- . - Battery Energy Storage System (BESS) Ready. All single-family residences that include one or two dwelling units, which a load § 150.0(s): serving entity provides with electrical service for the dwelling unit that is greater than 125 amps, shall meet at least one of the following: Either BESS-ready interconnection equipment with backed up capacity of 60 amps or more and four or more BESS supplied branch circuits in §150.0(s)2, or a dedicated raceway from the main service to a subpanel that supplies the branch circuits in § 150.0(s)2; at . least four branch circuits must be identified and have their source collocated at a single parielboard suitable to be supplied by the BESS, __ with one circuit supplying the refrigerator, one lighting circuit near the primary exit, and one circuit supplying a sleeping room receptacle outlet; main panelboard must have a minimum busbar rating of 225 amps; sufficient space must be reserved to allow future installation of a system isolation equipment/transfer switch within 3 feet of the main panelboard, with raceways installed between the panelboard and . the switch location to allow the connection of backup power source. * Heat Pump Space Heater Ready. Systems using gas or propane furnaces to serve individual dwelling units must include: A dedicated § 150.0(t): unobstructed 240V branch circuit wiring installed within 3' of the furnace with circuit conductors rated at least 30 amps with the blank cover identified as "240V ready;" and a reserved main electrical service panel space to allow for the installation of a double pole circuit breaker permanently marked as "For Future 240V use." Electric Cooktop Ready. Systems using gas or propane cooklop to serve individual dwelling units must include: A dedicated § 150.0(u): unobstructed 240V branch circuit wiring installed within 3' of the cooktop with circuit conductors rated at least 50 amps with the blank cover identified as "240V ready;" and a reserved main electrical service panel space to allow for the installation of a double pole circuit breaker permanently marked as "For Future 240V use." Electric Clothes Dryer Ready. Clothes dryer locations with gas or propane plumbing to serve individual dwelling units must include: A § 150.0(v): dedicated unobstructed 240V branch circuit wiring installed within 3' of the dryer location with circuit conductors rated at least 30 amps with the blank cover identified as "240V ready;` and a reserved main electrical service panel space to allow for the installation of a I , double pole circuit breaker permanently marked as "For Future 240V use." I I :_k6.__- - - § 110.9: - Lighting Controls and Components. All lighting control devices and systems, light sources, and luminaires must meet the applicable * requirements of §1 10.9. Luminaire Eff icacy. All installe . d luminaires and light sources must meet the requirements of Reference Joint Appendix JA8, except § 150.0(k)l A: lighting. integral to exhaust fans, kitchen range hoods, bath vanity mirrors, and garage door openers; navigation lighting less than 5 watts; lighting internal to drawers, cabinets, and linen closets with an efficacy of at least 45 lumens per watt; and ceiling fan kits subject to DOE's and Equipment Standards. * . __ - . _�ppliance Recessed Downlight Luminaires in Ceilings. Luminaires recessed into ceilings must not contain screw -based sockets, be airtight with air [§ 150.0(k)1C. . leakage rate < 2.0 cfm at 75 Pascals, and leak paths be sealed with a gasket or caulk. California Electrical Code Article 410.116 must also be met. * - _ � - .1 I 11. ... . � Planning and Appi FOR PERMI Master ID: Date: Linhtinn- Light Sources in Enclosed or Recessed Luminaires. Lamps and other separable light sources installed in enclosed or recessed § 150.0(.I) 1 D: luminaires must meet the JA8 elevated temperature requirements, including marking requirements. Blank Electrical Boxes. The number of electrical boxes that are more than five feet above the finished floor and do not contain a § 150.0(k)lE: luminaire or other device shall be no more than the number of bedrooms. These boxes must be served by a dimmer, vacancy sensor control, low voltage wiring, or fan speed control. § 150.0(k)2A: Indoor Lighting Controls. Lighting must have readily accessible wall -mounted controls that allow the lighting to be manually turned on and off. . Controls Permitted. An energy management control system (EMCS) may be used to comply with dimming, occupancy, and control § 150.0(k)2D: requirements if it provides the functionality of the specified control per §1 10.9 and the physical controls specified in §1 50,0(k)2A, Controls must not bypass a dimmer, occupant sensor, or vacancy sensor function installed to comply with §150.0(k)2. Automatic Shutoff Controls, In bathrooms, garages, laundry rooms, utility rooms and walk-in closets, at least one installed luminaire § . 150.0(k)2E: must be controlled by an occupancy or vacancy sensor providing automatic -off functionality. Lighting inside drawers and cabinets with opaque fronts or doors must have controls that turn the light off when the drawer or door is closed. . Dimmers. Lighting in habitable spaces (e.g., living rooms, dining rooms, kitchens, bedrooms) must have readily accessible wall -mounted dimming controls that allow the lighting to be manually adjusted up and down, except lighting integral to kitchen range hoods and bathroom exhaust fans, navigation lighting less than 5 watts, lighting internal to drawers, cabinetry with opaque fronts or doors and § 150.0(k)2F: controlled by automatic -off controls, luminaires in a circuit with controlled lighting power less than 20 watts or controlled by an occupancy or vacancy sensor. Forward phase cut dimmers controlling LED light sources in these spaces must comply with NEMA SSL 7A. Lighting integrated with eiling fan may be controlled via a remote control. § 150.0(k)2G: Independent Controls. Lighting integral to exhaust fans shall be controlled independently from the fans. Lighting under cabinets or shelves, lighting in display cabinets, and switched outlets must be controlled separately from ceiling -in stalled lighting. Residential Outdoor Lighting. Outdoor lighting permanently mounted to a single-family residential building or other buildings on the same lot must meet luminaire efficacy requirements of §150.0(k)IA, have a manual onloff switch and either a photocell and motion § 150.0(k)3: sensor, a photocell and automatic time switch, or an astronomical time clock. Controls that override to ON are not allowed, unless that override automatically returns the automatic control to its normal operation within 6 hours. An EMCS or other controls that provides the I specified control funGtionali!y may be used but must meet all applicable requirements. § 150.0(k)4: Internally Illuminated Address Signs must either comply with §140.8 or consume no more than 5 watts of power. § 150.0(k)5: Residential Garages for Eight or More Vehicles. Lighting for residential parking garages for eight or more vehicles must comply with the amlicable reauirements for nonresidential garages in §§ 110.9, 130.0, 130.1, 130.4, 140,6, and 141.0. Buildino Envelone: Air Leakage. Manufactured fenestration, exterior doors, and exterior pet doors must limit air leakage to 0,3 CFM per square foot or § 110.6(@)I: less when tested per NFRC-400, ASTM E283, or AAMAIWDMAICSA 101 /I.S.2/A440-201 1. * . - LI-factor, Solar heat gain coefficient, Visible transmittance. The fenestration product and exterior door's J-factor and solar heat §1 10.6(a)2-4: gain coefficient (SHGC) shall be rated in accordance with NFRC 100 and NFRC 200, or use the applicable defaults in Table 110.6-A and TABLE 110.6-B. The visible transmittance (VT) shall be rated in accordance with NFRC 200 or ASTM E972, for tubular da Ii htin devices VT shall be rated using NFRC 203. * § 110.6(a)5: Labeling. Fenestration products and exterior doors must have a label meetingthe requirementsof §10-111(a). Field -fabricated Exterior Doors and Fenestration products must use LI-factors from I able 110.6-A and solar heat gain coefficient (SHGC) § 110.6(b): . valuesfrorn Table 110.6-B, Must becaulked and/or weather-stripped. * Air Leakage. All joints, penetrations, and other openings in the building envelope that are potential sources of air leakage must be § 110.7: caulked, gasketed, or weather-stripped, § 110.8(a): Insulation Certification by Manufacturers. Insulation must be certified by the Department of Consumer Affairs, Bureau of Household Goods and Services (BHGS). § 110.8(g): Insulation Requirements for Heated Slab Floors. Heated slabfloors mustbe insulated perthe requirementsof §110.8(g)� Roofing Products Solar Reflectance and Thermal Emittance. The thermal emittance and aged solar reflectance values of the roofing § 1 1 0.8(i): material must meet the requirements of § 1 1 0.8(i) and be labeled per §1 0-1 13 when the installation of a cool roof is specified on the CF1 R. § 110.80): Radiant Barrier. When required, radiant barriers must have an emittance of 0.05 or less and be certified to the Department of Consumer Affairs, Roof Deck, Ceiling, and Rafter Roof Insulation. Roof decks in newly constructed attics above conditioned space in climate zones 4 and 8-16 area -weighted average Ll-factor not exceeding U-0.1 84, Ceiling and rafter roofs minimum R-22 insulation in wood -frame ceiling; or § 150.0(a): area -weighted average U-factor must not exceed 0.043. Rafter roof alterations minimum R-1 9 or area -weighted average U-factor of 0.054 or less. Attic access doors must have permanently attached insulation using adhesive or mechanical fasteners. The attic access must be gasketed to prevent air leakage. Insulation must be installed in direct contact with a roof or ceiling that is sealed to limit infiltration and exfiltration as specified in §1 10.7, including but not limited to placing insulation either above or below the roof deck or on top of a drywall * ceiling. § 150.0(b): Loose -fill Insulation. Loose fill insulation must meet the manufacturers required density for the labeled R-value. Wall Insulation. Minimum R-15 insulation in 2A inch wood framing wall or have a LI-factor of 0,095 or less, or R-21 in 2x6 inch wood § 150.0(c): framing or have a LI-factor of 0.069 or less, Opaque non -framed assemblies must have an overall assembly Ll-factor not exceeding 0.102, Masonrywalls must meet Tables 150.1-A. * § 150.0(d): Raised -floor Insulation. Minimum R-19 insulation in wood framed raised -floor or 0.037 maximum U-factor. * - . Slab Edge Insulation. Slab edge insulation must meet the following: water absorption rate no greater than 0.3 percent for insulation material § 150.0(f): alonewithout facings; water vapor permeance no greaterthan 2.0 perm per inch; protected from physical damage and UV light deterioration; and, when installed as part of a heated slab floor, meet the requirements of §1 10.8(g), Vapor Retarder. In climate zones 1 through 16, the earth floor of unvented crawl space must be covered with a Class I or Class 11 § 150.0(9)1: vapor retarder. This requirement also applies to controlled ventilation crawl space for buildings complying with the exception to §150.0(d). Vapor Retarder. In climate zones 14 and 16, a Class I or Class If vapor retarder must be installed on the conditioned space side of all § 150.0(g)2: insulation in all exterior walls, vented attics, and unvented attics with air -permeable insulation, - I Fenestration Products. Fenestration, including skylights, separating conditioned space trorn unconditioned space or outdoors must have § 150.0(q): � a maximum area -weighted average I Lfactor of 0,40. Solar Readiness: . Single-family Residences. Single-family residences located in subdivisions with 1 0 or more single-family residences and where the § 110.10(a)l: application for a tentative subdivision map for the residences has been deemed complete and approved by the enforcement agency, which do not have a photovoltaic system installed, must comply with the requirements of §1 10.10(b)-(e). ,-- . - Minimum Solar Zone Area. The solar zone must comply with access, pathway, smoke ventilation, and spacing requirements per Title 24, Part 9, or other parts of Title 24, or any requirements adopted by a local jurisdiction. The solar zone must be located on the roof or §1 10. 10(b)IA: overhang of the building and have a total area no less than 250 square feet. The solar zone total area must be comprised of areas with no dimension less than 5 feet and no less than 80 square feet each for buildings with roof areas up to 10,000 square feet-, or no less than 160 square feet each.for buildings with roof areas greater than 1 0,000 square feet. . § 1 1 0. 1 0(b)2: Azimuth- All sections of the solar zone located on steep -sloped roofs must have an azimuth between 90-300' of true north. Shading. No obstructions in solar zone, including but not limited to: vents, chimneys, architectural features, and roof * § 1 1 0. 1 0(b)3A: mounted equipment. - Shading. Any obstruction located on the roof or any other part of the building that projects above a solar zone must be located at least twice the § 1 1 0. 1 0(b)3B: horizontal distance of the height difference between the highest point of the obstruction and the horizontal projection of the nearest point of the solar zone, measured in the vertical plane. * Structural Design Loads on Construction Documents. For areas of the roof designated as a solar zone, the structural design loads for § 1 1 0. 1 0(b)4: roof dead load and roof live load must be clearly indicated on the construction documents. Interconnection Pathways. The construction documents must indicate: a location reserved for inverters and metering equipment and a § 110.10(c): . pathway reserved for routing of conduit from the solar zone to the point of interconnection with the electrical service: and for single-family residences and central water -heating systems, a pathway reserved for routing plumbing from the solar zone to the water -heating system. § 110.10(d): Documentation. A copy of the construction documents or a comparable document indicating the information from §1 10,1 0(b)-(c) must be provided to the occupant. § 110.10(e)l: Main Electrical Service Panel. The main electrical service panel must have a minimum busbar rating of 200 amps. Main Electrical Service Panel. The main electrical service panel must have a reserved space to allow for the installation of a double pole § 1 1 0. 1 O(e)2: circuit breaker for a future solar electric installation. The reserved space must be permanently marked as "For Future Solar Electric." Fireolace§. Decorative Gas Anoliances. and Gas Lou: § 110.5(e): Pilot Light. Continuously burning pilot lights are not allowed for indoor and outdoor fireplaces. § 150.0(p)l: Closable Doors. Masonry or factory -built fireplaces must have a closable metal or glass door covering the entire opening of the firebox. § 150.0(e)2: Combustion I take. Masonry or factory -built fireplaces must have a combustion outside air intake, which is at!eas�,t six square R-cFes -in area and is equipped with a readily accessible, operable, and tight -fitting damper or combustion -air control device. § 150.0(e)3: -, Flue Damper. Masonry orfactory-built fireplaces must have a fluedamperwith a readily accessible control. * *Exceptions may apply. .._______1.1 -.-----. -1 - __ - I I I . §10-111 Labeling Requirements: All fenestration shall comply with this section when implementing temporary and permanent labeling using National Fenestration Rating Council (NIFIRC) certification requirements showing the ILI-factors, Solar Heat Gain Coefficients (SHISC), Visible Transmittanqe (VT) and Air Leakage for fenestration products under Section 1 1 0.6(a) of part 6. STATEMENT OF CONFORMANCE These . Calculations contain all the building features and performance specifications required for compliance by the California Code of Regulations Title 24, Part 1, Administrative Requirements; Part 6, Building Energy Efficiency Standards; and portions of Title 20, Appliance Efficiency Standards. When these features are incorporated into the architectural plans the design will be in compliance with the 2025 Energy Efficiency Standards as they apply in the specified Climate Zone for residential buildings using a California Energy Commission approved compliance method. r_ r- . ____7 .- Prepared By: ,'�a�, 2?`1 11 - ,z� '_______ Rick Maurer M-90-40031 11 I I r- r- 17___� � L---=-- C,ABEC California Association of Building Energy Consultants U014 A 9 I 9 14 NJ4 il, 1:4 i&W0 F-A WMI -1 -----I- �'] .4" a) 2 U) (n E (n < 8'T 0 U_ (D - 0 a) 0 C6 cm 4- C C2 Lo M 4� r- 6- U) N 0 L: 0) C 0 .- 0 a) 0 CD 4- 0 0) 11- N (1) N 4- " 0) (1) 4- a) W < .0 U) (.) 0 U) U) 0 C6 = Of .- C ) :� < 06 2 04 � "t ,;:r C :3 C) M C,4 C/) L: 4) C �: 0 :L- C C.0 ::) , p 0) (L) r1- C: (1) C"', . L_ 0) = 4- (1) W < �: U) C) ou) 0 - 2:, W 0a 2� < (n (13 (1) 1qT 4- (L) ".T C 0 C:) Co < N 0 1W Q (1) .F 16- a. 0) dI'D 00 Z N C)) . �q < C-4 U UJ 6 _J 0) II.- C- � ro I.,. 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