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T-24-3
<br />2037 S Garnsey St
<br />Addition
<br />Santa Ana, Ca 92707
<br />2022 Single-Family Residential Mandatory Requirements Summary
<br />NOTE: Single-family residential buildings subject to the Energy Codes must comply with all applicable mandatory measures, regardless of the compliance approach
<br />used. Review the respective section for more information.
<br />(04/2022)
<br />Building Envelope:
<br />§ 110.6(a)1:
<br />§ 110.6(a)5:
<br />§ 110.6(b):
<br />§ 110.7:
<br />§ 110.8(a):
<br />§ 110.8(g):
<br />§ 110.8(i):
<br />§ 110.8(j):
<br />§ 150.0(a):
<br />§ 150.0(b):
<br />§ 150.0(c):
<br />§ 150.0(d):
<br />§ 150.0(f):
<br />§ 150.0(g)1:
<br />§ 150.0(g)2:
<br />§ 150.0(q):
<br />Air Leakage. Manufactured fenestration, exterior doors, and exterior pet doors must limit air leakage to 0.3 CFM per square foot or
<br />less when tested per NFRC-400, ASTM E283, or AAMA/WDMA/CSA 101/I.S.2/A440-2011. *
<br />Labeling. Fenestration products and exterior doors must have a label meeting the requirements of § 10-111(a).
<br />Field fabricated exterior doors and fenestration products must use U-factors and solar heat gain coefficient (SHGC) values from
<br />Tables 110.6-A, 110.6-B, or JA4.5 for exterior doors. They must be caulked and/or weather-stripped. *
<br />Air Leakage. All joints, penetrations, and other openings in the building envelope that are potential sources of air leakage must be
<br />caulked, gasketed, or weather stripped.
<br />Insulation Certification by Manufacturers. Insulation must be certified by the Department of Consumer Affairs, Bureau of Household
<br />Goods and Services (BHGS).
<br />Insulation Requirements for Heated Slab Floors. Heated slab floors must be insulated per the requirements of § 110.8(g).
<br />Roofing Products Solar Reflectance and Thermal Emittance. The thermal emittance and aged solar reflectance values of the
<br />roofing material must meet the requirements of § 110.8(i) and be labeled per §10-113 when the installation of a cool roof is specified
<br />on the CF1R.
<br />Radiant Barrier. When required, radiant barriers must have an emittance of 0.05 or less and be certified to the Department of Consumer
<br />Affairs.
<br />Roof Deck, Ceiling and Rafter Roof Insulation. Roof decks in newly constructed attics in climate zones 4 and 8-16 area-weighted
<br />average U-factor not exceeding U-0.184. Ceiling and rafter roofs minimum R-22 insulation in wood-frame ceiling; or area-weighted average
<br />U-factor must not exceed 0.043. Rafter roof alterations minimum R-19 or area-weighted average U-factor of 0.054 or less. Attic access
<br />doors must have permanently attached insulation using adhesive or mechanical fasteners. The attic access must be gasketed to
<br />prevent air leakage. Insulation must be installed in direct contact with a roof or ceiling which is sealed to limit infiltration and exfiltration
<br />as specified in § 110.7, including but not limited to placing insulation either above or below the roof deck or on top of a drywall ceiling. *
<br />Loose-fill Insulation. Loose fill insulation must meet the manufacturer’s required density for the labeled R-value.
<br />Wall Insulation. Minimum R-13 insulation in 2x4 inch wood framing wall or have a U-factor of 0.102 or less, or R-20 in 2x6 inch wood
<br />framing or have a U-factor of 0.071 or less. Opaque non-framed assemblies must have an overall assembly U-factor not exceeding 0.102.
<br />Masonry walls must meet Tables 150.1-A or B. *
<br />Raised-floor Insulation. Minimum R-19 insulation in raised wood framed floor or 0.037 maximum U-factor. *
<br />Slab Edge Insulation. Slab edge insulation must meet all of the following: have a water absorption rate, for the insulation material alone
<br />without facings, no greater than 0.3 percent; have a water vapor permeance no greater than 2.0 perm per inch; be protected from
<br />physical damage and UV light deterioration; and, when installed as part of a heated slab floor, meet the requirements of § 110.8(g).
<br />Vapor Retarder. In climate zones 1 through 16, the earth floor of unvented crawl space must be covered with a Class I or Class II
<br />vapor retarder. This requirement also applies to controlled ventilation crawl space for buildings complying with the exception to
<br />§150.0(d).
<br />Vapor Retarder. In climate zones 14 and 16, a Class I or Class II vapor retarder must be installed on the conditioned space side of
<br />all insulation in all exterior walls, vented attics, and unvented attics with air-permeable insulation.
<br />Fenestration Products. Fenestration, including skylights, separating conditioned space from unconditioned space or outdoors must have
<br />a maximum U-factor of 0.45; or area-weighted average U-factor of all fenestration must not exceed 0.45. *
<br />Fireplaces, Decorative Gas Appliances, and Gas Log:
<br />§ 110.5(e)
<br />§ 150.0(e)1:
<br />§ 150.0(e)2:
<br />§ 150.0(e)3:
<br />Pilot Light. Continuously burning pilot lights are not allowed for indoor and outdoor fireplaces.
<br />Closable Doors. Masonry or factory-built fireplaces must have a closable metal or glass door covering the entire opening of the firebox.
<br />Combustion Intake. Masonry or factory-built fireplaces must have a combustion outside air intake, which is at least six square inches in
<br />area and is equipped with a readily accessible, operable, and tight-fitting damper or combustion-air control device. *
<br />Flue Damper. Masonry or factory-built fireplaces must have a flue damper with a readily accessible control. *
<br />Space Conditioning, Water Heating, and Plumbing System:
<br />§ 110.0-§ 110.3:
<br />§ 110.2(a):
<br />§ 110.2(b):
<br />§ 110.2(c):
<br />§ 110.3(c)3:
<br />§ 110.3(c)6:
<br />5/6/22
<br />Certification. Heating, ventilation, and air conditioning (HVAC) equipment, water heaters, showerheads, faucets, and all other
<br />regulated appliances must be certified by the manufacturer to the California Energy Commission. *
<br />HVAC Efficiency. Equipment must meet the applicable efficiency requirements in Table 110.2-A through Table 110.2-N. *
<br />Controls for Heat Pumps with Supplementary Electric Resistance Heaters. Heat pumps with supplementary electric resistance
<br />heaters must have controls that prevent supplementary heater operation when the heating load can be met by the heat pump alone;
<br />and in which the cut-on temperature for compression heating is higher than the cut-on temperature for supplementary heating, and
<br />the cut-off temperature for compression heating is higher than the cut-off temperature for supplementary heating. *
<br />Thermostats. All heating or cooling systems not controlled by a central energy management control system (EMCS) must have a
<br />setback thermostat. *
<br />Insulation. Unfired service water heater storage tanks and solar water-heating backup tanks must have adequate insulation, or tank
<br />surface heat loss rating.
<br />Isolation Valves. Instantaneous water heaters with an input rating greater than 6.8 kBtu per hour (2 kW) must have isolation valves with
<br />hose bibbs or other fittings on both cold and hot water lines to allow for flushing the water heater when the valves are closed.
<br />2022 Single-Family Residential Mandatory Requirements Summary
<br />§ 110.5:
<br />§ 150.0(h)1:
<br />§ 150.0(h)3A:
<br />§ 150.0(h)3B:
<br />§ 150.0(j)1:
<br />§ 150.0(j)2:
<br />Pilot Lights. Continuously burning pilot lights are prohibited for natural gas: fan-type central furnaces; household cooking appliances
<br />(except appliances without an electrical supply voltage connection with pilot lights that consume less than 150 Btu per hour ); and pool and
<br />spa heaters. *
<br />Building Cooling and Heating Loads. Heating and/or cooling loads are calculated in accordance with the ASHRAE Handbook,
<br />Equipment Volume, Applications Volume, and Fundamentals Volume; the SMACNA Residential Comfort System Installation
<br />Standards Manual; or the ACCA Manual J using design conditions specified in § 150.0(h)2.
<br />Clearances. Air conditioner and heat pump outdoor condensing units must have a clearance of at least five feet from the outlet of any
<br />dryer.
<br />Liquid Line Drier. Air conditioners and heat pump systems must be equipped with liquid line filter driers if required, as specified by the
<br />manufacturer’s instructions.
<br />Water Piping, Solar Water-heating System Piping, and Space Conditioning System Line Insulation. All domestic hot water
<br />piping must be insulated as specified in § 609.11 of the California Plumbing Code. *
<br />Insulation Protection. Piping insulation must be protected from damage, including that due to sunlight, moisture, equipment`
<br />maintenance, and wind as required by §120.3(b). Insulation exposed to weather must be water retardant and protected from UV light (no
<br />adhesive tapes). Insulation covering chilled water piping and refrigerant suction piping located outside the conditioned space must
<br />include, or be protected by, a Class I or Class II vapor retarder. Pipe insulation buried below grade must be installed in a waterproof and
<br />non-crushable casing or sleeve.
<br />§ 150.0(n)1:
<br />§ 150.0(n)3:
<br />Ducts and Fans:
<br />§ 110.8(d)3:
<br />Gas or Propane Water Heating Systems. Systems using gas or propane water heaters to serve individual dwelling units must
<br />designate a space at least 2.5’ x 2.5’ x 7’ suitable for the future installation of a heat pump water heater, and meet electrical and
<br />plumbing requirements, based on the distance between this designated space and the water heater location; and a condensate drain no
<br />more than 2” higher than the base of the water heater
<br />Solar Water-heating Systems. Solar water-heating systems and collectors must be certified and rated by the Solar Rating and
<br />Certification Corporation (SRCC), the International Association of Plumbing and Mechanical Officials, Research and Testing (IAPMO
<br />R&T), or by a listing agency that is approved by the executive director.
<br />Ducts. Insulation installed on an existing space-conditioning duct must comply with § 604.0 of the California Mechanical Code (CMC). If a
<br />contractor installs the insulation, the contractor must certify to the customer, in writing, that the insulation meets this requirement.
<br />§ 150.0(m)1:
<br />CMC Compliance. All air-distribution system ducts and plenums must meet CMC §§ 601.0-605.0 and ANSI/SMACNA-006-2006 HVAC
<br />Duct Construction Standards Metal and Flexible 3rd Edition. Portions of supply-air and return-air ducts and plenums must be insulated to
<br />R-6.0 or higher; ducts located entirely in conditioned space as confirmed through field verification and diagnostic testing (RA3.1.4.3.8)
<br />do not require insulation. Connections of metal ducts and inner core of flexible ducts must be mechanically fastened. Openings must be
<br />sealed with mastic, tape, or other duct-closure system that meets the applicable UL requirements, or aerosol sealant that meets UL 723.
<br />The combination of mastic and either mesh or tape must be used to seal openings greater than ¼”, If mastic or tape is used. Building
<br />cavities, air handler support platforms, and plenums designed or constructed with materials other than sealed sheet metal, duct board or
<br />flexible duct must not be used to convey conditioned air. Building cavities and support platforms may contain ducts; ducts installed in
<br />these spaces must not be compressed. *
<br />§ 150.0(m)2:
<br />§ 150.0(m)3:
<br />§ 150.0(m)7:
<br />§ 150.0(m)8:
<br />§ 150.0(m)9:
<br />§ 150.0(m)10:
<br />§ 150.0(m)11:
<br />§ 150.0(m)12:
<br />Factory-Fabricated Duct Systems. Factory-fabricated duct systems must comply with applicable requirements for duct construction,
<br />connections, and closures; joints and seams of duct systems and their components must not be sealed with cloth back rubber adhesive
<br />duct tapes unless such tape is used in combination with mastic and draw bands.
<br />Field-Fabricated Duct Systems. Field-fabricated duct systems must comply with applicable requirements for: pressure-sensitive tapes,
<br />mastics, sealants, and other requirements specified for duct construction.
<br />Backdraft Damper. Fan systems that exchange air between the conditioned space and outdoors must have backdraft or automatic
<br />dampers.
<br />Gravity Ventilation Dampers. Gravity ventilating systems serving conditioned space must have either automatic or readily accessible,
<br />manually operated dampers in all openings to the outside, except combustion inlet and outlet air openings and elevator shaft vents.
<br />Protection of Insulation. Insulation must be protected from damage due tosunlight, moisture, equipment maintenance, and wind.
<br />Insulation exposed to weather must be suitable for outdoor service (e.g., protected by aluminum, sheet metal, painted canvas, or plastic
<br />cover). Cellular foam insulation must be protected as above or painted with a water retardant and solar radiation-resistant coating.
<br />Porous Inner Core Flex Duct. Porous inner cores of flex ducts must have a non-porous layer or air barrier between the inner core and
<br />outer vapor barrier.
<br />Duct System Sealing and Leakage Test. When space conditioning systems use forced air duct systems to supply conditioned air to an
<br />occupiable space, the ducts must be sealed and duct leakage tested, as confirmed through field verification and diagnostic testing, in
<br />accordance with Reference Residential Appendix RA3.1.
<br />Air Filtration. Space conditioning systems with ducts exceeding 10 feet and the supply side of ventilation systems must have MERV 13
<br />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.
<br />Clean-filter pressure drop and labeling must meet the requirements in §150.0(m)12. Filters must be accessible for regular service. Filter
<br />racks or grilles must use gaskets, sealing, or other means to close gaps around the inserted filters to and prevents air from bypassing the
<br />filter. *
<br />5/6/22
<br />2022 Single-Family Residential Mandatory Requirements Summary
<br />§ 150.0(m)13:
<br />Space Conditioning System Airflow Rate and Fan Efficacy. Space conditioning systems that use ducts to supply cooling must have
<br />a hole for the placement of a static pressure probe, or a permanently installed static pressure probe in the supply plenum. Airflow must
<br />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
<br />handlers and ≤ 0.58 watts per CFM for all others. Small duct high velocity systems must provide an airflow ≥ 250 CFM per ton of nominal
<br />cooling capacity, and an air-handling unit fan efficacy ≤ 0.62 watts per CFM. Field verification testing is required in accordance with
<br />Reference Residential Appendix RA3.3. *
<br />Ventilation and Indoor Air Quality:
<br />§ 150.0(o)1:
<br />§ 150.0(o)1B:
<br />Requirements for Ventilation and Indoor Air Quality. All dwelling units must meet the requirements of ASHRAE Standard 62.2,
<br />Ventilation and Acceptable Indoor Air Quality in Residential Buildings subject to the amendments specified in § 150.0(o)1. *
<br />Central Fan Integrated (CFI) Ventilation Systems. Continuous operation of CFI air handlers is not allowed to provide the whole-
<br />dwelling unit ventilation airflow required per §150.0(o)1C. A motorized damper(s) must be installed on the ventilation duct(s) that
<br />prevents all airflow through the space conditioning duct system when the damper(s) is closed andcontrolled per §150.0(o)1Biii&iv. CFI
<br />ventilation systems must have controls that track outdoor air ventilation run time, and either open or close the motorized damper(s) for
<br />compliance with §150.0(o)1C.
<br />§ 150.0(o)1C:
<br />§ 150.0(o)1G:
<br />Whole-Dwelling Unit Mechanical Ventilation for Single-Family Detached and townhouses . Single-family detached dwelling units,
<br />and attached dwelling units not sharing ceilings or floors with other dwelling units, occupiable spaces, public garages, or commercial
<br />spaces must have mechanical ventilation airflow specified in § 150.0(o)1Ci-iii.
<br />Local Mechanical Exhaust. Kitchens and bathrooms must have local mechanical exhaust; nonenclosed kitchens must have demand-
<br />controlled exhaust system meeting requirements of §150.0(o)1Giii,enclosed kitchens and bathrooms can use demand-controlled or
<br />continuous exhaust meeting §150.0(o)1Giii-iv. Airflow must be measured by the installer per §150.0(o)1Gv, and rated for sound per
<br />§150.0(o)1Gvi. *
<br />§ 150.0(o)1H&I: Airflow Measurement and Sound Ratings of Whole-Dwelling Unit Ventilation Systems. The airflow required per § 150.0(o)1C must
<br />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
<br />Residential Appendix RA3.7. Whole-Dwelling unit ventilation systems must be rated for sound per ASHRAE 62.2 §7.2 at no less than the
<br />minimum airflow rate required by §150.0(o)1C.
<br />§ 150.0(o)2:
<br />Field Verification and Diagnostic Testing. Whole-Dwelling Unit ventilation airflow, vented range hood airflow and sound rating,
<br />and HRV and ERV fan efficacy must be verified in accordance with Reference Residential Appendix RA3.7. Vented range hoods
<br />must 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
<br />rates and sound requirements per §150.0(o)1G
<br />Pool and Spa Systems and Equipment:
<br />§ 110.4(a):
<br />§ 110.4(b)1:
<br />§ 110.4(b)2:
<br />§ 110.4(b)3:
<br />§ 110.5:
<br />§ 150.0(p):
<br />Lighting:
<br />§ 110.9:
<br />§ 150.0(k)1A:
<br />§ 150.0(k)1B:
<br />§ 150.0(k)1C:
<br />§ 150.0(k)1D:
<br />§ 150.0(k)1E:
<br />§ 150.0(k)1F:
<br />5/6/22
<br />Certification by Manufacturers. Any pool or spa heating system or equipment must be certified to have all of the following: compliance
<br />with the Appliance Efficiency Regulations and listing in MAEDbS; an on-off switch mounted outside of the heater that allows shutting off
<br />the heater without adjusting the thermostat setting; a permanent weatherproof plate or card with operating instructions; and must not
<br />use electric resistance heating. *
<br />Piping. Any pool or spa heating system or equipment must be installed with at least 36 inches of pipe between the filter and the heater, or
<br />dedicated suction and return lines, or built-in or built-up connections to allow for future solar heating.
<br />Covers. Outdoor pools or spas that have a heat pump or gas heater must have a cover.
<br />Directional Inlets and Time Switches for Pools. Pools must have directional inlets that adequately mix the pool water, and a time
<br />switch that will allow all pumps to be set or programmed to run only during off-peak electric demand periods.
<br />Pilot Light. Natural gas pool and spa heaters must not have a continuously burning pilot light.
<br />Pool Systems and Equipment Installation. Residential pool systems or equipment must meet the specified requirements for pump
<br />sizing, flow rate, piping, filters, and valves. *
<br />Lighting Controls and Components. All lighting control devices and systems, ballasts, and luminaires must meet the applicable
<br />requirements of § 110.9. *
<br />Luminaire Efficacy. All installed luminaires must meet the requirements in Table 150.0-A, except lighting integral to exhaust fans, kitchen
<br />range hoods, bath vanity mirrors, and garage door openers; navigation lighting less than 5 watts; and lighting internal to drawers, cabinets, and linen
<br />closets with an efficacy of at least 45 lumens per watt.
<br />Screw based luminaires. Screw based luminaires must contain lamps that comply with Reference Joint Appendix JA8. *
<br />Recessed Downlight Luminaires in Ceilings. Luminaires recessed into ceilings must not contain screw based sockets, must be airtight,
<br />and must be sealed with a gasket or caulk. California Electrical Code § 410.116 must also be met.
<br />Light Sources in Enclosed or Recessed Luminaires. Lamps and other separable light sources that are not compliant with the JA8
<br />elevated temperature requirements, including marking requirements, must not be installed in enclosed or recessed luminaires.
<br />Blank Electrical Boxes. The number of electrical boxes that are more than five feet above the finished floor and do not contain a
<br />luminaire or other device shall be no more than the number of bedrooms. These boxes must be served by a dimmer, vacancy sensor
<br />control, low voltage wiring, or fan speed control.
<br />Lighting Integral to Exhaust Fans. Lighting integral to exhaust fans (except when installed by the manufacturer in kitchen exhaust
<br />hoods) must meet the applicable requirements of § 150.0(k). *
<br />§ 150.0(k)1G:
<br />§ 150.0(k)1H:
<br />§ 150.0(k)1I:
<br />§ 150.0(k)2A:
<br />§ 150.0(k)2B:
<br />§ 150.0(k)2A:
<br />§ 150.0(k)2B:
<br />§ 150.0(k)2C:
<br />§ 150.0(k)2D:
<br />§ 150.0(k)2E:
<br />§ 150.0(k)2F:
<br />§ 150.0(k)2K:
<br />§ 150.0(k)3A:
<br />§ 150.0(k)4:
<br />§ 150.0(k)5:
<br />Solar Readiness:
<br />§ 110.10(a)1:
<br />2022 Single-Family Residential Mandatory Requirements Summary
<br />Screw based luminaires. Screw based luminaires must contain lamps that comply with Reference Joint Appendix JA8. *
<br />Light Sources in Enclosed or Recessed Luminaires. Lamps and other separable light sources that are not compliant with the JA8
<br />elevated temperature requirements, including marking requirements, must not be installed in enclosed or recessed luminaires.
<br />Light Sources in Drawers, Cabinets, and Linen Closets. Light sources internal to drawers, cabinetry or linen closets are not required
<br />to comply with Table 150.0-A or be controlled by vacancy sensors provided that they are rated to consume no more than 5 watts of
<br />power, emit no more than 150 lumens, and are equipped with controls that automatically turn the lighting off when the drawer, cabinet or
<br />linen closet is closed.
<br />Interior Switches and Controls. All forward phase cut dimmers used with LED light sources must comply with NEMA SSL 7A.
<br />Interior Switches and Controls. Exhaust fans must be controlled separately from lighting systems. *
<br />Accessible Controls. Lighting must have readily accessible wall-mounted controls that allow the lighting to be manually turned
<br />on and off. *
<br />Multiple Controls. Controls must not bypass a dimmer, occupant sensor, or vacancy sensor function if the dimmer or sensor is installed
<br />to comply with § 150.0(k).
<br />Mandatory Requirements. Lighting controls must comply with the applicable requirements of § 110.9.
<br />Energy Management Control Systems. An energy management control system (EMCS) may be used to comply with dimming,
<br />occupancy, and control requirements if it provides the functionality of the specified control per § 110.9 and the physical controls specified
<br />in § 150.0(k)2A.
<br />Automatic Shutoff Controls. In bathrooms, garages, laundry rooms, utility rooms and walk-in closets, at least one installed luminaire
<br />must be controlled by an occupancy or vacancy sensor providing automatic-off functionality. Lighting inside drawers and cabinets with
<br />opaque fronts or doors must have controls that turn the light off when the drawer or door is closed.
<br />Dimmers. Lighting in habitable spaces (e.g., living rooms, dining rooms, kitchens, and bedrooms) must have readily accessible wall-
<br />mounted dimming controls that allow the lighting to be manually adjusted up and down. Forward phase cut dimmers controlling LED light
<br />sources in these spaces must comply with NEMA SSL 7A.
<br />Independent controls. Integrated lighting of exhaust fans shall be controlled independently from the fans. Lighting under cabinets or
<br />shelves, lighting in display cabinets, and switched outlets must be controlled separately from ceiling-installed lighting.
<br />Residential Outdoor Lighting. For single-family residential buildings, outdoor lighting permanently mounted to a residential building, or to
<br />other buildings on the same lot, must have a manual on/off switch and either a photocell and motion sensor or automatic time switch
<br />control) or an astronomical time clock. An energy management control system that provides the specified control functionality and meets all
<br />applicable requirements may be used to meet these requirements.
<br />Internally illuminated address signs. Internally illuminated address signs must either comply with § 140.8 or consume no more than 5
<br />watts of power.
<br />Residential Garages for Eight or More Vehicles. Lighting for residential parking garages for eight or more vehicles must comply with the
<br />applicable requirements for nonresidential garages in §§ 110.9, 130.0, 130.1, 130.4, 140.6, and 141.0.
<br />Single-family Residences. Single-family residences located in subdivisions with 10 or more single-family residences and where the
<br />application for a tentative subdivision map for the residences has been deemed complete and approved by the enforcement agency,
<br />which do not have a photovoltaic system installed, must comply with the requirements of § 110.10(b)-(e).
<br />§110.10(b)1A:
<br />§ 110.10(b)2:
<br />§ 110.10(b)3A:
<br />§ 110.10(b)3B:
<br />§ 110.10(b)4:
<br />§ 110.10(c):
<br />§ 110.10(d):
<br />§ 110.10(e)1:
<br />§ 110.10(e)2:
<br />Minimum Solar Zone Area. The solar zone must have a minimum total area as described below. The solar zone must comply with
<br />access, pathway, smoke ventilation, and spacing requirements as specified in Title 24, Part 9 or other parts of Title 24 or in any
<br />requirements adopted by a local jurisdiction. The solar zone total area must be comprised of areas that have no dimension less than 5
<br />feet and are no less than 80 square feet each for buildings with roof areas less than or equal to 10,000 square feet or no less than 160
<br />square feet each for buildings with roof areas greater than 10,000 square feet. For single-family residences, the solar zone must be
<br />located on the roof or overhang of the building and have a total area no less than 250 square feet. *
<br />Azimuth. All sections of the solar zone located on steep-sloped roofs must have an azimuth between 90-300° of true north.
<br />Shading. The solar zone must not contain any obstructions, including but not limited to: vents, chimneys, architectural features, and roof
<br />mounted equipment. *
<br />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
<br />horizontal distance of the height difference between the highest point of the obstruction and the horizontal projection of the nearest point of the
<br />solar zone, measured in the vertical plane. *
<br />Structural Design Loads on Construction Documents. For areas of the roof designated as a solar zone, the structural design loads for
<br />roof dead load and roof live load must be clearly indicated on the construction documents.
<br />Interconnection Pathways. The construction documents must indicate: a location reserved for inverters and metering equipment and a
<br />pathway reserved for routing of conduit from the solar zone to the point of interconnection with the electrical service; and for single-family
<br />residences and central water-heating systems, a pathway reserved for routing plumbing from the solar zone to the water-heating system.
<br />Documentation. A copy of the construction documents or a comparable document indicating the information from § 110.10(b)-(c) must be
<br />provided to the occupant.
<br />Main Electrical Service Panel. The main electrical service panel must have a minimum busbar rating of 200 amps.
<br />Main Electrical Service Panel. The main electrical service panel must have a reserved space to allow for the installation of a double pole
<br />circuit breaker for a future solar electric installation. The reserved space must be permanently marked as “For Future Solar Electric.”
<br />Electric and Energy Storage Ready:
<br />5/6/22
<br />2022 Single-Family Residential Mandatory Requirements Summary
<br />Energy Storage System (ESS) Ready. All single-family residences must meet all of the following: Either ESS-ready interconnection
<br />equipment with backed up capacity of 60 amps or more and four or more ESS supplied branch circuits, or a dedicated raceway from the
<br />main service to a subpanel that supplies the branch circuits in § 150.0(s); at least four branch circuits must be identified and have their
<br />source collocated at a single panelboard suitable to be supplied by the ESS, with one circuit supplying the refrigerator, one lighting circuit
<br />near the primary exit, and one circuit supplying a sleeping room receptacle outlet; main panelboard must have a minimum busbar rating of
<br />225 amps; sufficient space must be reserved to allow future installation of a system isolation equipment/transfer switch within 3’ of the main
<br />panelboard, with raceways installed between the panelboard and the switch location to allow the connection of backup power source.
<br />Heat Pump Space Heater Ready. Systems using gas or propane furnaces to serve individual dwelling units must include: A dedicated
<br />unobstructed 240V branch circuit wiring installed within 3’ of the furnace with circuit conductors rated at least 30 amps with the blank cover
<br />identified as “240V ready;” and a reserved main electrical service panel space to allow for the installation of a double pole circuit breaker
<br />permanently marked as “For Future 240V use.”
<br />Electric Cooktop Ready. Systems using gas or propane cooktop to serve individual dwelling units must include: A dedicated unobstructed
<br />240V branch circuit wiring installed within 3’ of the cooktop with circuit conductors rated at least 50 amps with the blank cover identified as
<br />“240V ready;” and a reserved main electrical service panel space to allow for the installation of a double pole circuit breaker permanently
<br />marked as “For Future 240V use.”
<br />Electric Clothes Dryer Ready. Clothes dryer locations with gas or propane plumbing to serve individual dwelling units must include: A
<br />dedicated unobstructed 240V branch circuit wiring installed within 3’ of the dryer location with circuit conductors rated at least 30 amps with
<br />the blank cover identified as “240V ready;” and a reserved main electrical service panel space to allow for the installation of a double pole
<br />circuit breaker permanently marked as “For Future 240V use.”
<br />*Exceptions may apply.
<br />HOLD - 2037 S Garnsey
<br />St & #24/10/2025
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