Blueprint 129 January - California Department Of Housing .

Issue 129January - March 2020BLUEPRINTCALIFORNIA ENERGY COMMISSIONEFFICIENCY DIVISIONIN THIS ISSUE 2019 Energy Code: Focus onLighting Nonresidential LightingChanges Residential Lighting Changes Future Energy Codes 2019 Energy Code: Central HeatPump Water Heaters Covid-19 Essential Workers 2019 Energy Code:PV Requirements for ADUs 2019 Energy Code: UpdatedCool Roof Brochures 2019 Energy Code: ApprovedLighting ATTCPs Q&A Calculation of Allowed IndoorLighting Power Outdoor Solar PoweredLighting2019 Energy Code: Focus onLightingCalifornia’s Building EnergyEfficiency Standards (Energy Code)have continued to evolve since1978. Statewide over the past 40years, the Energy Code has not onlyhelped save energy, but has alsosaved Californians billions of dollarson their utility bills.The 2019 Energy Code went intoeffect on January 1, 2020, andbrought some significant changesto residential and nonresidentialbuildings. For the first time, newlyconstructed homes are required toutilize a photovoltaic (PV) system togenerate renewable energy. Overall,single-family homes will use 53percent less energy than thosebuilt under the 2016 Energy Code,after accounting for more rigorousefficiency measures and renewableenergy generation.Nonresidential buildings will use30 percent less energy than thosebuilt under the 2016 Energy Code. Asignificant portion of those savingsare attributed to changes in thelighting requirements.Nonresidential LightingChangesThe biggest change is to theprescriptive indoor and outdoorlighting power allowances. Underthe 2016 Energy Code, highperformance T8 linear fluorescentlighting was used as the baselinefor indoor lighting power density(LPD) calculations. Under the 2019Energy Code, the baseline is LEDlighting. The shift to LED lightinghas significantly reduced LPDs.On average, indoor LPDs havebeen reduced by 28 percent whenutilizing the area category methodof compliance. This accounts for thesingle largest energy savings of allchanges in the 2019 Energy Code.Because LED lighting is alreadywidely used in the industry, thismay not have a substantial effecton the way lighting systems aredesigned. It will, however, effect theoverall energy consumption of thesebuildings, allowing less energytrade-offs between lighting andother aspects of the building, likethe building envelope.1

The 2019 Energy Code nowregulates healthcare facilities,including hospitals. There ismassive potential for energysavings in hospitals due totheir continuous operation andhigh-energy end use intensity.Hospitals must meet lighting powerallowance requirements and someof the mandatory lighting controlrequirements.For existing buildings, prescriptivelighting alteration compliancepathways have been simplified.Lighting alterations are no longerseparated into different categoriesor types. Indoor lighting alterationsare now triggered when 10 percentor more of the luminaires in anenclosed space are altered. Therequired lighting controls will bedependent on the proposed lightingpower. Additionally, the compliancepathway for reducing the existinglighting power continues to be anoption, however it is now limited tobuildings that are 5,000 square feetor less.Other changes to the nonresidentiallighting requirements include:Line voltage medium screw-baserecessed luminaires can nowutilize the rated wattage of theinstalled screw-base lamp if thelamp is certified per Reference JointAppendix JA8 (JA8).Public restrooms are now requiredto utilize occupancy sensingcontrols to turn lights off whenthe restroom is vacant. Multi-levellighting controls are no longerrequired for public restrooms.Exceptions to the automaticdaylighting control requirementshave been added. Sidelit daylitzones with overhangs and skylitdaylit zones with external shadingmay be exempt from automaticdaylighting controls when meetingspecific criteria. Sidelit daylit zonesin retail merchandise sales areasand wholesale showroom areasare now exempt from automaticdaylighting controls.Power adjustment factors forutilizing clerestory fenestration,light shelves, and horizontal slats toincrease daylighting for indoor areashave been added.Automatic scheduling controls arerequired for outdoor lighting. Thescheduling control must be capableof reducing outdoor lighting powerby at least 50 to 90 percent duringscheduled unoccupied periods.Residential LightingChangesJA8 high efficacy light sourcerequirements remain relativelyunchanged, however, productscertified under the 2019 EnergyCode must be labeled with anupdated “JA8-2019” or "JA82019-E" marking. Existing productscertified under the 2016 EnergyCode with either “JA8-2016” or"JA8-2016-E" markings may beused for compliance under the 2019Energy Code. These products do notneed to be retested or relisted in theCalifornia Energy Commission (CEC)Modernized Appliance EfficiencyDatabase System (MAEDbS). JA82019 certified products may beused for compliance under the 2016Energy Code.Other changes to the residentiallighting requirements include:Night lights, step lights, and pathlights are not required to be a highefficacy light source or controlled bya vacancy sensor if they are ratedat 5 watts or less and emit 150lumens or less.Lights internal to drawers, cabinets,and linen closets are not requiredto be a high efficacy light sourceor controlled by a vacancy2

sensor if they are rated at 5 watts orless, emit 150 lumens or less, andare controlled to automatically turnoff when the drawer, cabinet, orlinen closet is closed.Future Energy CodesThe CEC is responsible for adopting,developing, and updating theenergy code every three years.Development of the 2022 EnergyCode is already underway with anumber of new efficiency measuresunder evaluation. For lighting,these measures include, but arenot limited to: occupancy control inopen plan office spaces, daylightdimming-to-off control, reductionof lighting power allowances, andnetworked lighting controls.The Energy Code provides animportant contribution in helpingto achieve ambitious statewideenergy efficiency and greenhousegas (GHG) emission reductiongoals. Moving forward, the CEC willcontinue to work on minimizing theenvironmental impact of California’sbuildings by reducing buildingenergy use and GHG emissionsthrough cost effective energy codes.2019 Energy Code: Central HeatPump Water HeatersThe CEC's Executive Directorhas approved specific waterheating systems serving multipledwelling units for compliancewith the 2019 Energy Code asmeeting the requirements perSection 150.1(c)8C. Central heatpumps provide a pathway todecarbonize water-heating systemsfor multifamily buildings, whilecomplying with the Energy Code.The qualification criteria for thesesystems varies by climate zone. Thecriteria may require installing a solarwater heating system, or additionalPV system capacity per dwellingunit. In climate zone 16 (the coldestCalifornia climate zone), additionalThe CEC welcomes feedback onBlueprint. Please contact the editorat: Title24@energy.ca.gov.pipe insulation is also required. Seethe example system schematic inFigure 1.The new option allows projectsto comply via the prescriptive orperformance approach. Downloadthe latest version of CBECC-Res2019.1.2 or CBECC-Com 2019.1.2to model compliance using theperformance approach.A complete list of installation criteriaand system requirements is in theExecutive Director Determinationletter.Figure 1: Example central heat pump water heater system schematicCovid-19 Essential WorkersThe CEC is available to support essential workers in the construction field. The Energy Standards hotlineis responding to emails daily, Monday through Friday. Please leave a voice message to receive a telephoneresponse. In addition, the CEC has determined that Home Energy Rating System (HERS) raters and AcceptanceTest Technicians (ATTs) are considered essential workers. For more information see the CEC’s Advisory noticeand the message from Chair Hochschild on the CEC's response to Covid-19.For Energy Code training online or on-demand see Energy Code Ace's Training Schedule.3

2019 Energy Code:PV Requirements for ADUsThe 2019 Energy Code PV systemprescriptive requirements underSection 150.1(c)14 apply onlyto newly constructed detachedaccessory dwelling units (ADUs)for which the permit applicationwas submitted on or after January1, 2020. Smaller ADUs will requiresmaller PV systems, or maybe exempt from the PV systemrequirements if they meet Exception1 to Section 150.1(c)14: No PV is required if the effectiveannual solar access is restrictedto less than 80 contiguoussquare feet by shading fromexisting permanent natural orman-made barriers externalto the dwelling, includingbut not limited to trees, hills,and adjacent structures. Theeffective annual solar accessshall be 70 percent or greaterof the output of an unshaded PVarray on an annual basis.The PV system can be installed onthe ADU, or on the main house. Inthe event that panels are addedto an existing PV system to satisfythe PV system requirements forthe ADU, those additional panelsmust be part of the ADU’s permitapplication.The PV system requirements do notapply to alterations or additions toexisting homes, including detachedadditions where an existingdetached building is converted fromunconditioned to conditioned space(this is an addition per the EnergyCode definitions).Note: Energy Code requirements,including the PV requirements, donot apply to mobile home ADUs,which are subject to Title 25, notTitle 24.2019 Energy Code: UpdatedCool Roof BrochuresThe CEC has published two newbrochures on the 2019 EnergyCode – Low-rise Residential CoolRoofs and Nonresidential, Highrise Residential, Hotel and MotelCool Roofs. These brochures areavailable for download from theOnline Resource Center Envelopeweb page.These brochures include informationon the following requirements forcool roofs: Solar reflectance and thermalemittance Solar reflectance index Mandatory labeling requirements Prescriptive requirements Code triggers for roof alterations Exceptions to the requirements2019 Energy Code: ApprovedLighting ATTCPsLighting controls acceptance testtechnician certification provider(ATTCP) training has been approvedfor the 2019 Energy Code. TheCEC has approved the lightingcontrols ATTCP application updatesfor the 2019 Energy Code fromboth the California AdvancedLighting Controls Training Program(CALCTP) and the National LightingContractors Association of America(NLCAA). CALCTP and NLCAA cantrain, certify, and recertify lightingcontrols acceptance test techniciansand their employers under the 2019Energy Code. For more information,visit the ATTCP web page.4