December6,2013DocketNumber:EERE‐2011‐BT‐TP‐0042HeatingProducts‐2011‐TP‐0042@ee.doe.govTestProcedureNOPRforResidentialandCertainCommercialWaterHeaters2IntroductionDescription of Issues Addressed in ThisNOPR4Regulatory History2Rulemaking Overview31Introduction5Closing Remarks3Agenda9:00– 9:45 Welcome,Introductions,andOpeningRemarks9:45– 10:00 RegulatoryHistoryandRulemakingOverview10:00– 11:00 Scope11:00– 11:15 Break11:15– 11:45 TestSetup11:45– 12:30 TestConditions12:30– 1:30 Lunch1:30– 2:30 DrawPatterns2:30– 2:45 Break2:45– 3:15 RatedValuesforStorageVolumeandFHR3:15– 3:30AnnualEnergyConsumption3:30– 3:45 ConversionofExistingRatings3:45– 4:00 ClosingRemarks4WelcomeandIntroduction•Introductions•RoleoftheFacilitator•GroundRules–Listenasanally–Focusonissues–Useshort,succinctstatements/keeptothepoint–Holdsidebarconversationsoutsidetheroom–Onepersonspeaksatatime(raisehandtoberecognized;stateyournamefortherecord)–Setcellphonestosilent/vibrate•HousekeepingItems•AgendaReview•OpeningRemarksTitle Slide, Boiler Photo Source: http://www.easco.com/mobile-temporary-boilers-rentals.html5ListeningViatheWebcast•TheU.S.DepartmentofEnergy(DOE)isbroadcastingthismeetingliveovertheinternet.•DOEisprovidingthewebcasttoaccommodateinterestedpartiesthatareunabletoattendthepublicmeetinginperson.•Thewebbroadcastallowsinterestedpartiestolistenin,viewtheslides,andsubmitquestionsandcomments.•AllinterestedpartiesareencouragedtosubmitwrittencommentsafterthepublicmeetingbutbeforethecloseofthepubliccommentperiodonJanuary21,2014.6PurposeofthePublicMeeting•Presenttheproceduralandanalyticalapproachestoevaluatetestprocedureamendmentsforresidentialandcertaincommercialwaterheaters•Invitecommentonthetestprocedurenoticeofproposedrulemaking(NOPR)•Discussnextstepsintherulemaking.•Encourageparticipantstosubmitdata,information,summarystatements,andwrittencomments,includingadditionalissuesfordiscussion.7RequestforCommentThedeadlineforsubmittingcommentsisJanuary21,2014.WhileDOEinvitescommentonallaspectsofthematerialpresentedinthisdocument,severalspecificissuesonwhichDOEseekscommentaresetoutincommentboxeslikethisone.DOEusesthesecommentboxestohighlightissuesandtoaskspecificquestionsontheapproachestakentoamendthetestprocedures.8RegulatoryHistoryDescription of Issues Addressed in ThisNOPRClosing Remarks45Regulatory History2Rulemaking Overview31Introduction9RegulatoryHistory•TheEnergyPolicyandConservationAct(EPCA)of1975(PublicLaw94‐163),asamended–EstablishedtheEnergyConservationProgramforConsumerProductsotherthanAutomobiles,whichincludesresidentialwaterheaters.–EstablishedtheEnergyConservationProgramforCertainIndustrialEquipment,whichincludescommercialwaterheaters.–DirectsDOEtoestablishtestproceduresinconjunctionwithenergyconservationstandards.10RegulatoryHistory•TheEnergyIndependenceandSecurityActof2007(EISA2007)(PublicLaw110‐140)•DirectedDOEtodevelop,ifnecessary,atestprocedureamendmenttomeasureandincorporatestandbymodeandoffmodeenergyconsumptionintoalltestproceduresforcoveredresidentialproducts(42U.S.C.6295(gg)(2))•AmendedEPCAtorequiretheSecretarytoperiodicallyreviewalltestproceduresforpossibleamendment.(42U.S.C.6293(b);42U.S.C.6314(a)(1)(A))•TheAmericanEnergyManufacturingandTechnicalCorrectionsAct(AEMTCA)(PublicLaw112‐210)•AmendedEPCAtorequirethatDOEpublishafinalruleestablishingauniformefficiencydescriptorandaccompanyingtestmethodsforcoveredresidentialwaterheatersandcommercialwaterheatingequipment.11RegulatoryHistory•OnMay11,1998,DOEpublishedafinalruleintheFederalRegisterestablishingthecurrenttestproceduresforresidentialwaterheaters.63FR25996.ThetestproceduresforresidentialwaterheatersarelocatedinAppendixEtoSubpartBof10CFR430.•OnMay16,2012,DOEpublishedintheFederalRegisterafinalruleestablishingthecurrenttestproceduresforcommercialwaterheaters.77FR28928.Thetestproceduresforcommercialwaterheatersarelocatedat10CFR431.106.•OnOctober12,2011,DOEpublishedarequestforinformation(RFI)ontheneedtoamendthetestproceduresforresidentialwaterheaters.76FR63211.•OnJanuary11,2013,DOEpublishedarequestforinformation(RFI)requestinginputonthevariousissuespertainingtowaterheatersdiscussedinAEMTCA.78FR2340.12RulemakingOverviewDescription of issues Addressed in thisNOPRClosing Remarks45Regulatory History2Rulemaking Overview31Introduction13•DOEpublishedtheresidentialandcommercialwaterheaterstestprocedureNOPRonNovember4,2013.78FR66202.•DOEisholdingtheNOPRpublicmeetingtoday,December6,2013.•DOEwillacceptcommentsontheNOPRfrominterestedparties.–Oralcommentsfromtoday’smeetingwillberecordedandtranscribed.–InterestedpartiescansubmitwrittencommentsuntilJanuary21,2014.–DOEreviewsandconsidersallcomments.•DOEexpectstoissueafinalruleinearly2014.StepsintheRulemakingProcessNOPRFinalRuleRFI14DescriptionofIssuesAddressedinthisNOPRDescription of Issues Addressed in ThisNOPRClosing Remarks45Regulatory History2Rulemaking Overview31Introduction15SummaryofProposedMethodofTest•Proposestomodifythepreparationofwaterheatersfortesting•Modifiesthewaterdeliverytemperaturetobetterreflectconditionsasseenintypicalinstallationsinthefield•Proposestheuseofmultipledrawpatternsfortestingwaterheatersduringa24hoursimulatedusetest,withaparticularwaterheaterbeingtestedusingadrawpatternappropriateforitsdeliverycapacity•Proposesupdatestothedrawpatterntobemorereflectiveofactualfieldusagebasedonrecentdata•Proposestoincluderequirementsforratingstoragevolumeandfirsthourrating•Modifiesthecalculationofannualenergyconsumption16DescriptionofIssuesAddressedinthisNOPRDraw PatternsRated ValuesDETest SetupBTest ConditionsCAScope of CoverageAnnual Energy ConsumptionFConversion of Existing RatingsG17ScopeofTestMethod•ThescopeofcoveragefortheexistingDOEresidentialWHTPisnarrowerthanthescopeofDOE’sauthoritytocoverwaterheatersunderEPCA.–Forexample,waterheaterswithstoragevolumesatorabove2gallonsandlessthan20gallonsarenotcoveredinthetestmethodbutarewithinDOE’sauthorityunderEPCA.•TheproposedtestmethodwouldmodifythescopetoeliminatecoveragegapsforresidentialWHandmatchtheDOEtestmethodcoveragetotheauthorityunderEPCA.•Theproposedchangeswouldnotexpandthescopeofthecoverageofcurrentenergyconservationstandards.18ScopeofTestMethod•AEMTCAamendedEPCAtorequireDOEtodevelopauniformefficiencydescriptorthat:–Includesallcoveredresidentialandcommercialwaterheaters–Applies“tothemaximumextentpracticable,toallwaterheatingtechnologiesinuseasofthedateofenactmentofthisparagraphandtofuturewaterheatingtechnologies.”(42U.S.C.6295(e)(5)(C)and(H))•AEMTCAallowsforexclusionsforequipmentthat:–Doesnothavearesidentialuse–Iseffectivelyratedusingthethermalefficiencyandstandbylossdescriptors–Canbeclearlydescribedinthefinalrule(42U.S.C.6295(e)(5)(F))•DOEproposestoexcludefromtheuniformdescriptorthefollowingtypesofequipment:–UnfiredStorageTanks–Add‐onCommercialHeatPumpWaterHeaters–HotWaterSupplyBoilers–CommercialWaterHeatersnotmeetingtheproposeddefinitionof“Lightcommercialwaterheater”19ScopeofTestMethod– “LightCommercial”Definition•DOEproposestoaddadefinitionof“lightcommercialwaterheater”to10CFR431.102forequipmentthatmeetsthefollowingconditions:–Formodelsrequiringelectricity,usessingle‐phaseexternalpowersupply•Three‐phasepowersupplyisnottypicallyavailableinresidences.Thus,anyunitthatdoesnotusesingle‐phasepower(i.e.,uses3‐phasepower)wouldnotbeintendedforresidentialapplications–Isnotcapableofdeliveringhotwaterattemperaturesof1800Forabove•Temperaturesof1800Fandabovearenottypicallyrequiredinresidencesandaremorelikelytobeusedincommercialsettings–DoesnotbearaCodeSymbolStampsignifyingcompliancewiththerequirementsoftheASMEBoilerandPressureVesselCode•TheASMEcodesymbolstampistypicallyfoundoncommercialequipment•“Lightcommercial”waterheaterswouldbetestedusingtheuniformdescriptor.20ScopeofTestMethod– Gas‐fired•Existingtestmethodcoverageforresidentialgas‐firedwaterheaters:–Coversgasstorageandgasinstantaneous–Hasseveralcoveragegaps•Forstorage:between2and20gallons;over100gallons•Forinstantaneous:below50,000Btu/hinputrating•Proposedtestmethodforgas‐firedwaterheatersunderuniformdescriptor:–EliminatescoveragegapsinexistingresidentialTP–Coversbothresidentialand“lightcommercial”–Doesnotincludeupperorlowerstoragevolumelimit–Doesnotincludeupperorlowerinputratinglimits21ScopeofTestMethod– Gas‐fired•ExistingCoverage0501001502000 20 40 60 80 100 120

Input Capacity, kBtu/hrRatedVolume,gallonsResidentialGas Storage

Residential Gas Instantaneuos22ScopeofTestMethod– Gas‐fired•ProposedCoverage0501001502002500 20 40 60 80 100 120

Input Capacity, kBtu/hrRatedVolume,gallonsResidential Storage

Residential InstantaneuosProposedNewCoverageProposedNewCoverage

Proposed NewProposedpossible"LightCommercial" NewCoverage(if certaincriteriamet)23ScopeofTestMethod– Electric•Existingtestmethodcoverageforresidentialelectricwaterheaters:–Coverselectricstorage–Containsseveralcoveragegaps•Forstorage:between2and20gallons;over120gallons•Electricinstantaneousdefinitioncurrently“reserved”•Proposedtestmethodforelectricwaterheatersunderuniformdescriptor:–EliminatescoveragegapsinexistingresidentialTP•Definesandclarifiestestmethodforelectricinstantaneouswaterheaters–Coversbothresidentialand“lightcommercial”–Doesnotincludeupperorlowerstoragevolumelimit–Doesnotincludeupperinputratinglimit24ScopeofTestMethod– Electric•ExistingCoverage05101520253035400 20 40 60 80 100 120

Input Capacity, kWRatedVolume,gallonsResidentialElectric Storage25ScopeofTestMethod– Electric•ProposedCoverage05101520253035400 20 40 60 80 100 120

Input Capacity, kWRatedVolume,gallonsResidentialElectric Storage

Electric InstantaneousProposedNewCoverageProposedpossible"LightCommercial"NewCoverage(if certaincriteriamet)26ScopeofTestMethod– Oil‐fired•Existingtestmethodcoverageforresidentialoil‐firedwaterheaters:–Coversoil‐firedstorage–Containsseveralcoveragegaps•Forstorage:over50gallons•Oil‐firedinstantaneous•Proposedtestmethodforoil‐firedwaterheatersunderuniformdescriptor:–Eliminatescoveragegaps–Coversbothresidentialand“lightcommercial”–Doesnotincludeupperorlowerstoragevolumelimit–Doesnotincludeupperinputratinglimit27ScopeofTestMethod– Oil‐fired•ExistingCoverage0501001502002500 20 40 60 80 100 120

Input Capacity, kBtu/hRatedVolume,gallonsResidentialOil‐fired Storage28ScopeofTestMethod– Oil‐fired•ProposedCoverage0501001502002500 20 40 60 80 100 120

Input Capacity, kBtu/hRatedVolume,gallonsResidentialOil‐fired StorageProposed NewCoverageProposedpossible"LightCommercial "NewCoverage(ifcertaincriteriamet)29ScopeSummary•ProposestoexpandthescopeofcoveragesothatthetestmethodisapplicabletoallproductsthatmeettheEPCAdefinitionofresidentialwaterheater–Includeswaterheaterswithstoragevolumesbetween2and20gallons–Removesminimumlimitonfiringrateofinstantaneousgaswaterheaters–Removesthelimitationsonmaximumstoragevolumesthatarecurrentlyintheresidentialtestprocedureforstoragewaterheaters–Amendstestproceduretoincludeapplicableprovisionsforelectricinstantaneouswaterheaters•Coverscertaincommercialwaterheaters–Onlyexcludescategoriesofwaterheatersthatdonothavearesidentialuse–Addsadefinitionof“lightcommercialwaterheater”to10CFR431.102forequipmentthatmeetsthefollowingconditions:•Formodelsrequiringelectricity,usessingle‐phaseexternalpowersupply;•Isnotcapableofdeliveringhotwaterattemperaturesof1800Forabove;and•DoesnotbearaCodeSymbolStampsignifyingcompliancewiththerequirementsoftheASMEBoilerandPressureVesselCode30Item1:Istheproposeddefinitionof“lightcommercialwaterheater”appropriate,andisitappropriatetotestcommercialwaterheatersmeetingthisdefinitionundertheuniformdescriptor,whiletestingallothercommercialwaterheatersusingthermalefficiencyandstandbyloss?ScopeRequestforComment31DescriptionofIssuesAddressedinthisNOPRDraw PatternsRated ValuesDETest SetupBTest ConditionsCAScope of CoverageAnnual Energy ConsumptionFConversion of Existing RatingsG32WaterHeaterTestPreparation•Proposestorequirestoragewaterheaterstobepre‐conditionedfortheenergyfactortestbyrunningthedrawpatternsontwoconsecutivedays,withmeasurementsonlytakingplaceduringthesecond24‐hourperiod–Aimstomakethestateofthewaterheateratthebeginningofthe24‐hourtestperiodsimilartothatattheendofthetestperiod,therebyminimizingtheneedtomakelargecorrectionstotheenergyconsumptionvalues–Ensuresthewaterheaterisatoperationaltemperatureatstartoftest•Proposestorequireaonehouridleperiodpriortocommencementof24‐hoursimulatedusetestforinstantaneouswaterheatersItem5:Whatistheaddedburden,ifany,inrequiringa24‐hourpre‐conditioningperiodforstorage‐typewaterheaterscomparedtocurrentpractice?33DescriptionofIssuesAddressedinthisNOPRDraw PatternsRated ValuesDETest SetupBTest ConditionsCAScope of CoverageAnnual Energy ConsumptionFConversion of Existing RatingsG34TestConditions•Proposestolowerthesetpointtemperatureofresidentialwaterheatersinthetestprocedurefrom1350Fto1250F–Lowersthesetpointtemperaturetobetterrepresentconditionsobservedinrecentstudies•DOE2010TechnicalSupportDocument,Chapter7:Theaveragesetpoint observedinthefieldestimatedas124.20F.•Proposestosetwaterheatertemperaturecontrolsonstoragewaterheaterstobetteryielddeliveredwateratthenominaltemperature–Forwaterheaterswithasinglecontrol:•Followingcutout,drawwaterfromtankandmonitoroutletwatertemperaturefor2or5minutes.Forwaterheaterswitharatedvolume<20gallons,useaflowrateof1gpm;forwaterheaterwitharatedvolume≥20gallons,useaflowrateof1.7gpm.•Maximumoutletwatertemperaturemustbe1250F± 50F–Forwaterheaterswithtwoormorethermostatcontrols– useexistingmethod•Setuppermostthermostatsothattemperaturemeasuredbythesensorsabovethecorrespondingheatingelementinsidetankis1250F± 50F•Proceedwithprocessuntillowermosttemperaturecontrolresultsinaveragewatertemperatureof1250F± 50Finwaterheater35ProposedChangestoAccountfor125°FSetpoint•FirstHourRatingTest–Modifiescriteriontoterminatedrawswhenoutletwaterbecomestoocold–Proposestoterminatedrawswhenoutletwatertemperaturedrops150Fbelowitsmaximummeasuredtemperatureduringthedraw•Changesthecriterionfromthecurrent250Fdropwiththesetpointtemperatureat1350F•Maintainstheinherentassumptionthatthenominalminimumusefultemperatureforhotwateris1100F36ChangestoCalculations•Maximumgpm Rating(Section6.2.1)•SimulatedUseTest–ModifiescalculationproceduresforEnergyFactortonormalizestoredwatertemperatureanddeliveredwatertemperatureto1250FItem6:Istheproposedchangetothenominalwaterdeliverytemperatureto1250Fappropriate,andifnot,whatdataorinformationareavailablethatwouldjustifyadifferentwaterdeliverytemperature?Item7:Istheproposedmethodforsettingthethermostat(s)ofstorage‐typewaterheatersappropriate?ൌ10ሺതെതሻ10ሺሻሺ125Ԭ െ 58Ԭሻൌെൣ൫ത,2െത,,2൯െሺ125Ԭ െ 67.5Ԭሻ൧37DescriptionofIssuesAddressedinthisNOPRDraw PatternsRated ValuesDETest SetupBTest ConditionsCAScope of CoverageAnnual Energy ConsumptionFConversion of Existing RatingsG38MultipleDrawPatterns•Proposesarevisedsimulated‐usetestthatinvolvesfourdifferentdrawpatternsforwaterheatersofdifferentcapacities–Classifieswaterheatersintothefollowingusagecategories:1)Point‐of‐use,2)low,3)medium,and4)high.–Basesclassificationontheratedfirsthourratingtestforstoragewaterheatersortheratedmaximumflowrateforinstantaneouswaterheaters.–Rangesarebasedonfirst‐hourratingdataforexistingmodels,requirementsofthecurrentplumbingcode,andrecommendedcut‐offsproposedbycommenterstoRFIUsageCategory FirstHourRating(gallons) Maximum FlowRate(gallons/min.)Point‐of‐Use FHR<20 Max FR<1.7Low 20≤FHR<55 1.7≤MaxFR<2.8Medium 55≤FHR<80 2.8≤MaxFR<4High FHR≥80 Max FR≥439ModifiedDrawPattern•Proposesdrawpatternshavingdifferentdailydrawvolumesandnumbersofdrawsthatcapturethekeywaysinwhichhotwaterisusedinresidenceswhileyieldingatestthatisrepeatable–Implementsdrawpatternsthatinvolvedrawswiththreedifferentflowrates,avarietyofdrawlengths,andavarietyofspacingbetweendraws–Distributesdrawstomimictimingofusesinaresidence–Specifiesthefollowingtotalvolumeofwaterdrawnandnumberofdrawsin24hoursimulatedtestforeachdrawpattern:Point‐of‐use:10gallons,9drawsLow:38gallons,11drawsMedium:55gallons,12drawsHigh:84gallons,14draws40Item3:Istheproposedmethodofcharacterizingwaterheatersaspoint‐of‐use,low,medium,orhighappropriateandsufficient?Item4:Arethedrawpatternsproposedforthedifferentwaterheatersizecategoriesappropriate?ModifiedDrawPattern41DescriptionofIssuesAddressedinthisNOPRDraw PatternsRated ValuesDETest SetupBTest ConditionsCAScope of CoverageAnnual Energy ConsumptionFConversion of Existing RatingsG42RatedValues•DuetoimpactontheEFefficiencyrequirementsandratingsDOEproposestoestablishrequirementsforratingthefollowingvalues:–RatedStorageVolume–FirstHourRating–MaxGPMRating•Newrequirementsforratedstoragevolume,firsthourrating,andmaxGPMratingwouldbeplacedin10CFR429.•DOEproposestoeliminateprovisionsthatallowmanufacturerstodesignateasinglestandardinputratingfortestingelectricwaterheatersthatareidenticalexceptwithdifferentinputratings.Instead,DOEwouldrequiremanufacturerstestunitsatallinputratings.43RatedValues– StorageVolume•DOEhashad63waterheaterstestedatindependenttestlabs–Ratedstoragevolumewasalwayshigherthanthemeasuredstoragevolumeinthesamplesthatweretested–ANSIandULstandardsprescribetheallowabledifferencebetweenmeasuredandratedstoragevolumesforwaterheaters•Federalstandardsaredirectlyproportionaltoratedstoragevolume–Asratedstoragevolumeincreases,theefficiencyrequirementdecreases•DOEproposestorequirethatanyrepresentedvalueoftheratedstoragevolumemustbecalculatedasthemeanofthemeasuredstoragevolumes,Vst,ofalltheunitswithinthesample.•FortestingconductedbyDOE,thecertifiedratingwillbeconsideredvalidonlyifthemeasurementiswithinfivepercentofthecertifiedrating.–Ifthecertifiedratedstoragevolumeisvalid,thatvolumewillbeusedasthebasisfortherequiredenergyfactorforthebasicmodel.–Ifthecertifiedratedstoragevolumeisinvalid,theaveragemeasuredvolumewillbeusedasthebasisfortherequiredenergyfactorforthebasicmodel.44RatedValues– StorageVolume•DOEtested19ElectricWaterHeaters.–Ratedstoragevolumerangedfrom5.0%to10.6%higherthanmeasuredstoragevolume.–Onaverageratedstoragevolumewas9.4%higherthanmeasured.0.0%2.0%4.0%6.0%8.0%10.0%12.0%14.0%16.0%18.0%0 2 4 6 8 10 12 14 16 18 20

Percent Difference b/t Measured and Rated VolumeUnitNumber45RatedValues– StorageVolume•DOEtested44gasandpropanewaterheaters.–Ratedstoragevolumerangedfrom1.5%to15.6%higherthanmeasuredstoragevolume.–Onaverageratedstoragevolumewas4.8%higherthanmeasured.0.0%2.0%4.0%6.0%8.0%10.0%12.0%14.0%16.0%18.0%0 5 10 15 20 25 30 35 40 45

Percent Difference b/t Measured and Rated VolumeUnitNumber46RatedValues– FHRandMaxGPM•Applicabledrawpatternfor24‐hoursimulatedusetest wouldbedeterminedbyeithertheFHR(storage)orMaxGPM(instantaneous)•DOEproposesthatanyrepresentedvalueofFHRorMaxGPMmustbecalculatedasthemeanofthemeasuredFHRorMaxGPMratingsofalltheunitswithinthesample•FortestingconductedbyDOE,thecertifiedratingwillbeconsideredvalidonlyifthemeasurementiswithinfivepercentofthecertifiedrating–Ifthecertifiedratingisvalid,thatratingwillbeusedasthebasisfordeterminingthedrawpattern–Ifthecertifiedratingisinvalid,theaveragemeasuredratingwillserveasthebasisfordeterminingtheapplicabledrawpattern47DescriptionofIssuesAddressedinthisNOPRDraw PatternsRated ValuesDETest SetupBTest ConditionsCAScope of CoverageAnnual Energy ConsumptionFConversion of Existing RatingsG48AnnualEnergyConsumption•DOEproposestorevisecalculationofannualenergyconsumptionsothatitisbasedontheEFrating•BasescalculationoftheannualenergyconsumptionontheenergyfactorratingratherthanthedailyenergyconsumptionsothatwaterheatermodelswiththeexactsameEFratinghavethesameestimatedannualenergyconsumptionandyearlyoperatingcosts•DOEproposestoaddseparateestimatesofannualfossilfuelenergyconsumptionandannualelectricalenergyconsumptioninadditiontotheoverallannualenergyconsumption–Allowstheuserofthetestproceduretoestimateoperationalcostofwaterheatersthathavedualfuelinputs49CalculationofAnnualEnergyConsumption•AnnualEnergyConsumption,Eannualwhere:V:nominalvolumeofhotwaterdrawnduringapplicabledrawpattern:densityofwaterat1250Fcp:specificheatofwaterat91.50F67:nominaltemperaturedifferencebetweeninletandoutletEf:energyfactor•AnnualElectricalEnergyConsumption,Eannual,eEannual,e=Eannual*(Qe/Q)/3412where: Qe:dailyelectricalenergyconsumptionQ:totalenergyusedbywaterheaterduring24hourtest3412:conversionfactorfromBtutokWh•AnnualFossilFuelEnergyConsumption,Eannual,fEannual,f=Eannual– (Eannual,ex3412)ࡱ࢒ࢇ࢛࢔࢔ࢇൌ ૜૟૞ ൈࢂ࣋ࢉ࢖ૠ ૟ࡱࢌ50EstimatedAnnualOperatingCost•Theestimatedannualoperatingcostwouldbedeterminedasfollows:–Forgasoroilestimatedannualoperatingcostisthesumof:•Theproductoftheannualgasoroilenergyconsumptiontimestherepresentativeaverageunitcostofgasoroil,asappropriate,indollarsperBtu•Theproductoftheannualelectricenergyconsumptiontimestherepresentativeaverageunitcostofelectricityindollarsperkilowatt‐hour–Forelectric:•Theproductoftheannualenergyconsumptiontimestherepresentativeaverageunitcostofelectricityindollarsperkilowatt‐hourItem8:DOEseekscommentontheadditionoftermstoquantifydailyelectricenergyconsumptionseparatelyfromfossilfuelenergyconsumptionandaddingseparateestimatesofannualfossilfuelenergyconsumptionandannualelectricalenergyconsumptioninadditiontotheoverallannualenergyconsumption.51DescriptionofIssuesAddressedinthisNOPRDraw PatternsRated ValuesDETest SetupBTest ConditionsCAScope of CoverageAnnual Energy ConsumptionFConversion of Existing RatingsG52ConversionofExistingRatings•AEMTCArequiresDOEtodevelopamathematicalconversionfactortotranslatefromtheexistingmetricstotheuniformdescriptor.(42U.S.C.6295(e)(5)(E))•DOEwillconductaseparaterulemakingtodevelopthemethodforconversionofexistingefficiencyratingstoratingsundertheuniformdescriptor–Targetcompletionendof2014.•ManufacturerscanuseconversionfactortoreratemodelsinexistencepriortotheeffectivedateoftheuniformdescriptoruntiloneyearafterpublicationorDec.31,2015(whicheverislater)•Conversionfactormustnotaffecttheminimumefficiencyrequirementsforcoveredwaterheaters53ConversionofExistingRatings•Todate,DOEhasperformedtestingon20waterheaters:–10Electric(8storage,including1HP,and2instantaneous)–8 Gas‐fired(5storageand3instantaneous)–2 Oil‐firedstorage•FHRresults– notrend–FHRunderproposalrangedfrom13%lowerto30%higherthantheFHRunderthecurrenttest.Average2%increaseunderproposal.•MaxGPMresults– increased–AllunitstestedhadincreaseinmaxGPMrangingfrom9%to17%underproposal.Averageincreasewas13%.•EFresults– generallydecreasedforlowandmediumpatternsandincreaseforhighusagepatternItem2:Isinformationordataavailableregardingthetranslationofcurrentfirst‐hourratingstoafirst‐hourratingdeterminedusingtheproposed1250Fsetpoint?Whatistheeffectofsuchtranslationontheappropriatebreakpointsbetweendifferentsizecategories?54ConversionofExistingRatings– FirstHourRating•Firsthourratingresultsunderproposedandcurrenttestmethodshowsnotrend55ConversionofExistingRatings– FirstHourRating•Groupedbydrawpattern,slightincreasingtrendemerges.–Samplesizetoosmallandresultstoovariabletodrawdefinitiveconclusions56ConversionofExistingRatings– MaxGPMRating•MaxGPMresultsunderproposedtestmethodincreaseascomparedtocurrenttestmethod0.000.200.400.600.801.001.201.400123456

Maximum GPM rating under new test procedure as percentage of rating under current testMaximumgpmratingundercurrenttestprocedureNaturalgasElectricLineofequivalence57ConversionofExistingRatings– MaxGPMRating•Increasesoccurforallsizeswhengroupedbydrawpattern0.000.200.400.600.801.001.201.400.0 1.0 2.0 3.0 4.0

Maximum GPM rating under new test procedure as percentage of ating under current testApplicabledrawprofileundercurrenttestprocedureNaturalgasElectricLineofequivalencePointofuseLow usageMediumusageHighusage58ConversionofExistingRatings– EnergyFactor•EnergyFactorshowslittletrendwhenresultsaregroupedbyproducttypeandcurrentefficiencyrating59ConversionofExistingRatings– EnergyFactor•EnergyFactorgenerallydecreasesatdrawpatternswithlowertotalvolumesandincreasesforthehighusagepattern60PublicMeetingAgendaDescription of Issues Addressed in ThisNOPRClosing Remarks45Regulatory History2Rulemaking Overview31Introduction61ClosingRemarksMeetingparticipantsareinvitedtoprovideclosingremarksorstatementsatthistime.62HowtoSubmitWrittenComments•Inallcorrespondence,pleaserefertotheresidentialandcommercialwaterheaterrulemakingby:TestProceduresforResidentialandCommercialWaterHeatersDocketNumber:EERE‐2011‐BT‐TP‐0042RegulatoryIdentificationNumber(RIN):1904‐AC53•Email:HeatingProducts‐2011‐TP‐0042@ee.doe.govPostal:Courier:Ms.BrendaEdwardsU.S.DepartmentofEnergyBuildingTechnologiesOffice,MailstopEE‐2J1000IndependenceAvenue,SWWashington,DC20585‐0121Ms.BrendaEdwardsU.S.DepartmentofEnergyBuildingTechnologiesOffice950L’EnfantPlaza,SW,6thFloorWashington,DC20024Tel:(202)586‐2945Commentperiodcloses:January21,2014— 11:59PMEDThttp://www1.eere.energy.gov/buildings