ASHRAEIESNA-Standard-901教学讲解课件

AnInsideLookatANSI/ASHRAE/IESNA

Standard90.1-2019

MickSchwedler,PE

Manager

TraneApplicationsEngineering

Chair,SSPC90.1EnergyStandardforBuildingsExcept

Low-RiseResidentialBuildingsHelpyougaina

workingknowledgeof

ASHRAEStandard90.1ASHRAEStandard90.1-2019

TopicsforToday’sDiscussionBriefhistoryImplementationCodesU.S.militaryrequirementsLEED®greenbuildingratingprogramContentsTitle,purpose,scopeAspectsofbuildingaddressedbyprovisionsASHRAEStandard90.1-2019Briefhistory•Milestones•Planforreprints•Scopeof2019revisionHistoricalTimeline90.1-2019

minor

revisions90.1-2019

updates,

reorganization90.1-2019

majorrewrite90.1-1989

updated90.1-1975

firstissued90.1-1980

updated1990200020191970198090.1-2019UpdatesASHRAEStandard90.1

PublicationPlanLastpublishedinlate2019Futurereprintsat3-yearintervalsCoordinatedwithmodelbuildingcodesPreviousversionplusallpublishedaddendasincelastreprint90.1-2019plannedforBODapproval

inJune2019ASHRAEStandard90.1

2019Changesfrom2019Incorporates42addendapublishedsince90.1-2019wasreleasedASHRAEStandard90.1

Scopeof2019Updatenewin

2019

90.1Marksanoteworthychangefrom90.1-2019applicationTIPMarksanapplicationtip,

notastandardrequirementASHRAEStandard90.1-2019Implementation•Modelcodes•U.S.government•OutsideU.S.•LEED®programASHRAEStandard90.1and

ModelCodesASHRAEStandard90.1isadoptedby:AmericanNationalStandardsInstitute

(90.1-2019)NationalFireProtectionAssociationInternationalCodeCouncil

(InternationalEnergyConservationCode)ASHRAEStandard90.1and

EnergyCodesIECC–Chapter8adopts90.1-2019byreferenceIECC–Chapter7describesanalternatepathforcomplianceIncludesmanyprovisionsof90.1-2019ASHRAEisproposingcodechangestoincreasestringencyInternationalEnergyConservationCode

(IECC)ASHRAEStandard90.1and

StateEnergyCodesAskedDOEforextensionMeetorexceed90.1-2019,2019,or201990.1beingconsidered(state

bldgs)(state

bldgs)(voluntary)(state

bldgs)(July1,2019)(state

bldgs)(optional)ASHRAEStandard90.1adoptionby

U.S.DepartmentofDefense“2-1MANDATORYENERGYANDWATERCONSERVATIONCRITERIA.Familyhousing(residential)shallbedesignedandconstructedinaccordancewiththelatestEnergyStarstandards,perotherappropriateservice-specificcriteriaandguidance.OtherfacilitiesshallbedesignedandconstructedinaccordancewiththelatesteditionofASHRAEStandard90.1.”—ExcerptfromUnifiedFacilitiesC/techinfo/ufc/

081602_UFC3-400-01.pdfASHRAEStandard90.1adoption

OutsidetheU.S.UnitedStates

ASHRAEStandard

90.1-2019Thailand

Majorchanges

basedonbuilding

envelopestudiesCanada

Similarorhigher

efficiencylevelsBrazil

Law10295(2019),

EnergyEfficiency

StandardsChina

Modifyingfor

highlocalambient

wetbulbsASHRAEStandard90.1and

LEED®-NCVersion2.2EAp2:MinimumenergyperformanceMandatoryprovisionsof90.1-2019andPrescriptiverequirementsor14%betterthan90.1-2019EAc1:OptimizeenergyperformanceAwardspointsforimprovingperformanceratingofthedesignbuildingvs.baselinebuildingatleast14%betterthan90.1-2019LEEDNC2009:EAp2

MinimumenergyperformanceOption1:performancecompliancepathMandatoryprovision(5.4,6.4,7.4,8.4,9.4,and10.4)BaselinebuildingcomplieswithAppendixGBuildingPRM10%betterthan90.1-2019fornewconstruction,5%betterforexistingbuildingOption2:prescriptivecompliancepathASHRAEAEDGsmallofficebuildings2019smallretailbuildings2019smallwarehousesandself-storagebuildings2019Option3:prescriptivecompliancepathAdvancedBuildingsCorePerformanceGuide

EAC1–Modeling

Upto19pointsNewBuildingsExistingBuildingRenovationsPoints12%8%114%10%216%12%318%14%420%16%522%18%624%20%726%22%828%24%930%26%1032%28%1134%30%1236%32%1338%34%1440%36%1542%38%1644%40%1746%42%1848%44%19ASHRAEStandard90.1-2019Contents•Purpose•Scope•AspectsofbuildingaddressedbyprovisionsASHRAEStandard90.1-2019

Purpose“…Provideminimumrequirementsfortheenergy-efficientdesignofbuildingsexceptlow-riseresidentialbuildings”ASHRAEStandard90.1-2019

ScopeNewbuildingsandtheirsystemsNewportionsofbuildings

andtheirsystemsNewsystemsandequipmentinexistingbuildingsASHRAEStandard90.1-2019

ExclusionsLow-riseresidentialbuildingsASHRAEStandard90.2coverslow-rise

(3storiesorless),one-family,andtwo-familyresidentialbuildingsBuildingsthatdonotuseelectricityorfossilfuelEquipmentandportionsofbuildingsystemsthatuseenergytosupportindustrial,manufacturing,orcommercialprocessesASHRAEStandard90.1

SectionsSection1:PurposeSection2:ScopeSection3:Definitions,Abbreviations,andAcronymsSection4:AdministrationandEnforcementSection5:BuildingEnvelopeSection6:HVACSection7:ServiceWaterHeatingSection8:PowerSection9:LightingSection10:ElectricMotorsSection11:EnergyCostBudget(ECB)MethodSection12:NormativeReferencesAppendicesASHRAEStandard90.1Section5:

BuildingEnvelopesection5:buildingenvelope

BasisofRequirementsClimatezoneSpaceconditioningcategoryNonresidentialconditionedResidentialconditionedSemiheatedConstructionclass©2019

AmericanStandardAllrightsreservedLookupclimate

zonesbylocation…Miami,SanJuan=1ASeattle =4CReykjavik =7A

moistC

marineB

dryGroupsclimatesinto8zonesSubcategorizeszones

byhumiditylevelappendixB:buildingenvelope

ClimateCriteria1

very

hot8

subartic7

very

cold6

cold5

cool4

mixed3

warm2

hotU.S.ClimateClassifications

(Briggsetal.,2019)ASHRAEStandard90.1

MoreInternationalDataForSouthAmerica…Ascuncion Montivideo

Belem PortoAlegre

Brasilia PuntaArenas

BuenosAries Recife/Curado

Caracas RiodeJaneiro

Concepcion SanJuan

Cordoba deMarcona

Fortaleza Santiago

LaPaz SaoPaulo

Lima TalaraASHRAEStandard90.1

MoreInternationalDataForPuertoRico…AllZone1AExcept,Barranquitas2SSW -2BCayey1E -2BASHRAEStandard90.1

CompliancePaths:Envelopeproposed

buildingdesign90.1-compliant

buildinggeneral&

mandatory

provisionsPrescriptive

BuildingEnvelope

Option(§5.5)BuildingEnvelope

Trade-OffOption

(§5.6,performance)EnergyCost

BudgetMethod

(ECB,§11)MandatoryProvisionsLabelingofinsulationR-valueRatingofdoorsandfenestrationAirleakageBuildingenvelopeFenestrationanddoorsLoadingdocksVestibules(withexceptions)section5:buildingenvelope

TypicalAssembliesOnesummaryofrequirementsforeachclimatezonePrecalculatedheattransfervaluessimplifyapplication©2019

AmericanStandardAllrightsreservedsection5:buildingenvelope

DemonstratingComplianceOpaqueelementsMaximumU-factorforentireassembly,orMinimumratedR-valuesofinsulationFenestration…MaximumU-factorMaximumsolarheat

gaincoefficient(SHGC) …basedonorientation

andpercentageprescriptivecompliance

EnvelopeFenestrationSkylightareaaspercentage

ofgrossroofareaVerticalfenestrationglazing

areaaspercentageofgrosswallareaU-factordependsonconstructiontypeSolarheatgaincoefficient(SHGC)dependsonorientationprescriptivecompliance

OpaqueEnvelopeElementsNocalculationsrequired…Either:SpecifyinsulationR-valueorLookupcommonU-factorsoverallU-factors

RoofConstructionClassesInsulationentirely

abovedeckMetalbuildingroofsAtticandotherroofsoverallU-factors

Above-GradeWallsMasswallsMetalbuildingwallsMetal-framedwallsWood-framedandotherwallsEnvelopeAddendaas:Modifiesopaqueenveloperequirementsat:Modifiesfenestration(glass)requirements90.1

2019

Changeexample*ExcerptfromTable5.5-2,BuildingEnvelopeRequirementsforClimateZone2(A,B),ofASHRAEStandard90.1-2019Exampleof§5.5’scompliancecriteriaforroofs,basedonclimatezoneandconstructiontypeBuildingEnvelopeRequirements*©2019

AmericanStandardAllrightsreservedexample*ExcerptfromTable5.5-5,BuildingEnvelopeRequirementsforClimateZone5ofASHRAEStandard90.1-2019Exampleof§5.5’scompliancecriteriaforroofs,basedonclimatezoneandconstructiontypeBuildingEnvelopeRequirements*©2019

AmericanStandardAllrightsreservedexample*ExcerptfromTable5.5-1,BuildingEnvelopeRequirementsforClimateZone1(A,B),ofASHRAEStandard90.1-2019Exampleof§5.5’scompliancecriteriaforroofs,basedonclimatezoneandconstructiontypeBuildingEnvelopeRequirements*©2019

AmericanStandardAllrightsreservedsection5:buildingenvelope

DemonstratingComplianceInlieuofprescriptiveoptions….BuildingEnvelopeTrade-OffOption,orEnergyCostBudgetmethodStillinconjunctionwithmandatoryrequirementsBuildingEnvelopeTrade-OffOption—

EnvStd5.0software

automatesEnvelope

PerformanceFactor

calculationssection5:buildingenvelope

SummaryCriteriabasedonspacetypeOnetablesummarizesenvelope

requirementsperclimatezonePrecalculatedU-factorsfor

commonconstructiontypesComputerized“building

envelopetrade-off”procedure©2019

AmericanStandardAllrightsreservedASHRAEStandard90.1Section6:

HVACSection7:

ServiceWaterHeatingSimplified

Approach

Option(§6.3)ASHRAEStandard90.1

CompliancePaths:HVACproposed

HVACdesign90.1-compliant

HVACsystemprescriptive

requirements

(§6.5)Simplified

Approach

Option(§6.3)EnergyCost

BudgetMethod

(ECB,§11)(smallbuildingsonly)mandatory

provisions

(§6.4)HVACcompliancewithStd90.1

SimplifiedApproachMinimaleffortEquallystringentrequirementsFitsontwopagesLimitedto…Buildingswith1or2storiesBuildingslessthan25,000squarefeetSingle-zonesystemsAir-cooledorevaporativelycooledHVACcompliancewithStd90.1SimplifiedApproachEconomizerasnecessaryHeat:Heatpump,fuel-firedfurnace,electricresistance,orbaseboardsystemwithboilerOutdoorair:≤3,000cfm,<70%ofSA,unlessenergyrecoveryisusedManual-changeoverordual-setpointthermostatControlsforheatpumpswithauxiliaryheatNoreheatforhumiditycontrolcontinuedHVACcompliancewithStd90.1

SimplifiedApproachNightsetbackcontrols

(excepthotel/motelguestrooms)InsulationforpipingandductworkBalancingofductedsystemsInterlockedthermostatsforseparateheatingandcoolingequipmentExhaust>300cfm:GravityormotorizeddampersSystem>10,000cfm:Optimumstartconcludedsection6:HVAC

MandatoryProvisionsSimplified

Approach

Option(§6.3)proposed

HVACdesign90.1-compliant

HVACsystemprescriptive

requirements

(§6.5)Simplified

Approach

Option(§6.3)EnergyCost

BudgetMethod

(ECB,§11)(smallbuildingsonly)mandatory

provisions

(§6.4)section6:HVAC

MandatoryProvisionsEquipmentefficienciesLoadcalculationsControlsConstructionandinsulationCompletionrequirements Drawings,manuals,balancing,and

commissioningAirconditionersand

condensingunitsHeatpumpsChillersPTACsFurnacesBoilersHeat-rejectionequipmentmandatoryHVACprovisions

EquipmentEfficienciessection6:HVAC

EquipmentEfficienciesraisedan:Boilerefficiencies

18trillionBtuofgasoroilannuallyasstockturnsF:Three-phaseair-cooledACandheatpumps

2.3quadsby2035g:Air-cooledACandheatpumps

1.05quadsby203590.1

2019

Changeexamplesof

EquipmentEfficiencies§:“…Wheremultipleratingconditions

orperformancerequirementsareprovided,theequipmentshallsatisfyallstatedrequirements…”Equipmenttype

MinimumefficiencySelf-contained,water-cooled 11.0EER

w/electricresistanceheat 10.3IPLV

(20–100tons)Water-sourceheatpump 12.0EER(cooling)

(1.5–5.25tons) 4.2COP(heating)Centrifugalchiller, 6.10COP 0.576kW/ton

water-cooled(300tons) 6.40IPLV 0.549IPLV

(atARIratingconditions)mandatoryHVACprovisions

LoadCalculationsMustcalculateheatingandcoolingsystemdesignloadsMustbasecalculationsongenerallyacceptedengineeringstandardsandhandbooks©2019

AmericanStandardAllrightsreservedmandatoryHVACprovisions

ZoneThermostaticControlsRequiredforeachzone

Perimetercanbetreateddifferently≥5ºFdeadband

Dualsetpointordeadband

(canbesoftwareforDDC)zonethermostaticcontrols

PerimeterZones60ftbuildingplanview:thermalzoningexample<50ftCoreandeach

longexposure

mustbezoned

separatelyZ1Z5Z2Z3Z4Treatingthese

exposuresasa

singlezoneis

okayOff-hourControlsExceptionwasdeletedforHVACsystemsservinghotel/motelguestrooms90.1

2019

Changemandatoryforsystems≥

15,000Btu/h

AutomaticShutdownAutomatic7-day/weektimeclock

with10-hourbatterybackupException:2-day/weekthermostatforresidentialapplicationsOccupancysensorManuallyoperatedtimer

(maximumduration:2hours)Securitysysteminterlockmandatoryforsystems

≥15,000Btu/h

SetbackControlsClimatezones2-8:

Lowerheatingsetpointto55°ForlessClimatezones1b,2b,3b(hot/dry):

Automaticallyrestart,temporarilyoperateRaisecoolingsetpointto90°Forhigher OrPreventhighspacehumiditylevelsmandatoryHVACprovisions

OtherOff-HourControlsProvideoptimumstartifsystemsupply-aircapacity>10,000cfmZoneisolation:25,000ft²maximumzonesizeononefloorIsolationdevicestoshutoffoutdoorandexhaustairflowCentralsystemscapableofstableoperationZoneIsolation

ExamplecentralVAVfansystemroof“normally-closed”

VAVboxesVAVboxeswith

DDCcontrolsreturnair(typical)motorizeddampercombinationfire/smokedampersupplyducttozones(typical)©2019

AmericanStandardAllrightsreservedASHRAE62.1ReferenceChangedfrom62.1-2019to62.1-2019VentilationrateschangedNowbasedonsummationofratesperpersonandperarea90.1

2019

ChangemandatoryHVACprovisions

VentilationSystemControlsProvidemotorizeddampers:InstairandelevatorshaftsOngravityhoods,vents,andventilators Exceptions:Buildings<3storieshigh Or,anybuildinginclimatezones1,2,3

(hotclimates)VentilationsystemsservingunconditionedspacesmandatoryHVACprovisions

VentilationSystemControlsProvideshutoff-dampercontrolfor

outdoor-airsupplyandexhaustsystemsAutomaticallyshutwhensystemsorspacesarenotinuseAutomaticallyshutduringbuildingwarm-up,cool-down,andsetbackExceptions:Buildings<3storieshigh,oranybuildinginclimatezones1,2,3Outdoor-airintakeorexhaust<300cfmmandatoryHVACprovisions

DamperLeakageRate* Dampers<24inchesineitherdimension

mayhaveleakageof40cfm/ft²Maximumleakageat1.0in.wg,

cfm/ft²ofdamperareaClimatezone Motorized Non-motorized1,2,6,7,8 4cfm/ft² NotallowedAllothers 10cfm/ft² 20cfm/ft²*mandatoryHVACprovisions

Ventilation:HighOccupancyDemandControlVentilation(DCV)requiredforSpaces>500ft2anddesignoccupancy

>40people/1000ft²:90.1

2019

Change(was3000cfmand

100people/1000ft2)mandatoryHVACprovisions

HeatPumps:AuxiliaryHeatForheatpumpswithinternalelectricheaters,controlsmustlockoutelectricheatwhenloadcanbemetbyheatpumpaloneException:

HeatpumpsregulatedbyNAECAifHSPFratingmeetsTable6.8.1BandincludeselectricresistanceheatingmandatoryHVACprovisions

HumidificationControlsHumidifierpreheat

ShutoffhumidifierpreheatwhenhumidificationisnotrequiredHumidificationanddehumidification

Preventsimultaneousoperation Exception:

Spacesthatrequirespecifichumiditylevels(computerrooms,museums,hospitals)ifapprovedbyauthorityhavingjurisdictionmandatoryHVACprovisions

Ventilation:HighOccupancyIfoutdoorair>3,000cfmand

designoccupancy>100people/1000ft²:AutomaticallyreduceoutdoorairintakebelowdesignrequirementswhenspacesarepartiallyoccupiedExceptions:Systemswithexhaust-airenergyrecoverycomplyingwithSectionSystemswith<1,200cfmoutdoorair©2019

AmericanStandardAllrightsreservedComplyingwiththemandatoryHVACprovisionsinASHRAEStandard90.1-2019requiresunit-andsystem-levelcontrolsmandatoryHVACprovisions

Construction&InsulationInsulationmustbesuitedtoenvironmentDuct,plenuminsulationClimatezoneLocationPipinginsulationHeating,domestichotwater,orcoolingTemperaturePipesizeDuct

Insulation

Example©2019

AmericanStandardAllrightsreservedFigure6-Gfrom

90.1User’sManualConstructionandInsulationMustleak-testductwork

ifdesignstaticpressure

>3in.wgmandatoryHVACprovisions

CompletionRequirementsDocumentationwithin90daysofsystemacceptance:DrawingsofactualinstallationSubmittaldataOperationandmaintenancemanualsServiceagencyinformationControlsequencesandschematicsmandatoryHVACprovisions

CompletionRequirementsSystembalancingWrittenreportconditionedspaces>5000ft²Forairsidesystemfanpower>1hpandhydronicpumps>10hp:

1. Minimizethrottlinglosses

2. TrimimpelleroradjustdesignspeedcontinuedmandatoryHVACprovisions

CompletionRequirementsCommissioning(AppendixE)Controlelementscalibrated,adjusted,and

inworkingorderDesignermustprovidedetailedinstructions(perAppendixE)forprojects>50,000ft² Exceptions:

Warehouses,semi-heatedspacesconcludedsection6:HVAC

MandatoryProvisionsRecapMustbemetwhetherusingprescriptiveorperformance(ECBmethod)pathMandatesinclude:EquipmentefficiencyControlsConstructionandinsulationCompletionrequirements(drawings,manuals)Balancingandcommissioningsection6:HVAC

PrescriptiveRequirementsSimplified

Approach

Option(§6.3)proposed

HVACdesign90.1-compliant

HVACsystemprescriptive

requirements

(§6.5)Simplified

Approach

Option(§6.3)EnergyCost

BudgetMethod

(ECB,§11)(smallbuildingsonly)mandatory

provisions

(§6.4)section6:HVAC

PrescriptiveRequirementsEconomizersSimultaneousheatingandcoolingAirsystemdesign

andcontrolHydronicsystem

designandcontrolHeatrejectionequipmentEnergyrecoveryExhausthoodsRadiantheatingHotgasbypasslimitationprescriptiveHVACrequirements

EconomizersClimateandsystemsizedetermineneedforaneconomizerMaybeeitherairsideorwatersideNumerous(9)exceptions,includinganefficiencytradeoffControlmustbeintegratedwithmechanicalcoolingOperationmustnotincreaseheatingenergyconsumptionCoolingcapacityforwhich

aneconomizerisrequiredclimateandsystemsizedeterminants

EconomizersClimatezone1a,1b,2a,3a,4a Economizerunnecessary

(PuertoRico,Miami,St.Louis,Charlotte)2b,5a,6a,7,8 ≥135,000Btu/h

(Yuma,Chicago,Edmonton)3b,3c,4b,4c,5b,5c,6b ≥65,000Btu/h

(Denver,Lubbock,Vancouver)prescriptiveHVACrequirements

AirEconomizersProhibitedcontroltypesFixedenthalpyinclimatezones

1b,2b,3b,3c,4b,4c,5b,5c,6b,7,8Differentialdrybulbinclimatezones

1a,2a,3a,4aHigh-limitshutoffcontrolsettingsAbletorelieveexcessoutdoorairprescriptiveHVACrequirements

WaterEconomizersCapacity:100%ofsystemcoolingloadat

50°FDB/45°FWB(45°FDB/40°FWB

fordehumidification)Maximumpressuredrop<15ft

(orbypassed)whennotinuseFigure6-Ofrom

90.1User’sManualwaterside

economizerprescriptiveHVACrequirements

SimultaneousHeating–CoolingZonecontrolsNoreheatingNorecoolingNomixingorsimultaneouslysupplyingmechanically(oreconomizer)cooledandmechanicallyheatedairExceptionsbasedonzoneairflowsimultaneousheating–cooling

Zone-ControlExceptionsZoneairflowdoesnotexceedwhichever

islargest:ASHRAEStandard62’szone

requirementsforoutdoorair0.4cfm/ft²30%ofsupplyair300cfmASHRAEStandard62’s

multiple-spacerequirementssimultaneousheating–cooling

Zone-ControlExceptionsZoneswithspecialpressurizationrequirementsZoneswithcode-requiredminimumcirculationratesSite-recoveredorsite-solarenergyprovides≥75%ofreheatenergyconcludedprescriptiveHVACrequirements

SimultaneousHeating–CoolingHydronicsystemcontrolsThree-pipe:NotallowedTwo-pipechangeover:Controlsmustpreventchangeoverunless…Outdoordrybulbchangesby≥15°FSystemoperatesinonemodeatleast

4hoursDifferencebetweencoolingandheatingtemperaturesis≤30°FprescriptiveHVACrequirements

SimultaneousHeating–CoolingHydronic(waterloop)heatpumpsystemsDeadband≥20°F

(Exception:Optimizedloopcontrol)Climatezones3-8:Bypassforclosed-circuitfluidcoolerIsolateopentowersfromheat-pumploopprescriptiveHVACrequirements

SimultaneousHeating–CoolingDehumidificationPrevent:ReheatingMixingofhotandcoldairstreamsHeatingandcoolingthesameairstreamsimultaneousheating–cooling

DehumidificationExceptionsReducingsupplyairflowto50%,orminimumventilationrateSystems<6.67tonsthatcanunload

atleast50%Systemssmallerthan3.3tonsSystemswithspecifichumidityrequirements(museums,surgicalsuites)75%ofreheat/recoolenergyissite-recoveredorsite-solarsidestreamchillerarrangement

WatersideHeatRecoveryproduction

(supply)distribution

(demand)heat-recovery

chillerbypasslineapplicationTIPprescriptiveHVACrequirements

SimultaneousHeating–CoolingHumidification:Ifthehydroniccoolingsystemrequires

aneconomizer…Andifhumidityof>35°FDPmustbemaintained…ThentheeconomizermustbewatersideprescriptiveHVACrequirements

AirSystemDesign&ControlFansystempowerlimitation:Appliestosystems>5hpOption Constantvolume Variablevolume1)Nameplatehp hp≤CFMsx0.0011 hp≤CFMsx0.00152)Systembhp

bhp≤CFMsx0.00094+A bhp≤CFMsx0.0013+A90.1

2019

ChangeFanPowerLimitationPressureDropAdjustmentA=Σ(PDxCFMdesign/4131)PDspecifiedforDuctsFiltersGas-phaseaircleanersHeatrecoverydevicesSoundattenuationsectionsOtherdevices90.1

2019

ChangeprescriptiveHVACrequirements

AirSystemDesign&ControlVAVfancontrolMotors≥10hprequireoneof

thefollowing:Variable-speeddriveVaneaxialfanwithvariable-pitchbladesDesignwattage≤30%at50%airvolumeDDCsystemsmustincludesetpointreset(fan-pressureoptimization)(was15hp)90.1

2019

ChangeFan-PressureOptimizationcommunicatingBASduct

pressureVAVdamper

positionDamperposition

(%open)of

criticalVAVbox75%65%IncreasestaticpressuresetpointReducestaticpressuresetpointNoactionfan-pressureoptimization

ControlLogicapplicationTIPprescriptiveHVACrequirements

HydronicSystemDesign&ControlTheseprovisionsapplyifpumpsystempower>10hp:Mustbevariableflowunless…Pumppower≤75hp≤3ControlvalvesLimitdemandofindividualvariable-flowpumpsto30%ofdesignwattageat50%flow(e.g.,useVSD)Pumphead>100ftMotor>50hpprescriptiveHVACrequirements

HydronicSystemDesign&ControlPumpisolation

(Serieschillers“1chiller”)Chilledandhotwaterreset

>300,000Btu/hunless:ImproperoperationresultsSystemisvariableflowTwo-positionshutoffvalveforheatpumpsystem

>10hpbypassline(decoupler)primary

pumpssecondary

pumpsChilledwatersystemdesign:

Primary–secondary©2019

AmericanStandardAllrightsreservedapplicationTIPDP(typical)Chilledwatersystemdesign:

Variableprimaryflow©2019

AmericanStandardAllrightsreservedbypasslinevariable-flow

pumpsapplicationTIPprescriptiveHVACrequirements

Heat-RejectionEquipmentFanspeedcontrolMotors≥7.5hpmustbeabletooperate

at2/3offullspeedorlessExceptions:CondenserfansservingmultiplecircuitsorfloodedcondensersInstallationsinclimatezones1and2Upto1/3ofthefansonamultiple-fanapplication(ifleadfansmeetspeedcontrolrequirement)chiller–toweroptimization

UseofFanSpeedscondenserwatersetpoint,°Fchillerplantpower,kW02004006008001000120060657075808590730tons:

54°FWB1160tons:

59°FWB1550tons:

65°FWBShadedareas=OptimalsetpointapplicationTIPprescriptiveHVACrequirements

AirsideEnergyRecoveryRequiredif:Supplyaircapacity≥5,000cfmMinimumoutdoorair≥70%Recoverysystemeffectiveness≥50%Exceptions(9)Labs,toxicexhaust,etc.Largestexhaust<75%outdoorairflowenergy-recoverytechnologies

Total-EnergyRecoveryTotal-energy,rotary

heatexchangers,

a.k.a.EnthalpywheelsHeatwheelsEnergywheelsDesiccantwheelsMembrane,fixed-plate

heatexchangersprescriptiveHVACrequirements

WatersideEnergyRecoveryMustrecovercondenserheatforservicewaterheating(SWH)if:Facilityoperates“24/7”andHeatrejection>6,000,000Btu/handSWHload>1,000,000Btu/hWhererequired,meetthesmallerof:Recover60%ofrejectedcondenserheatorPreheatwaterto85°Fwatersideenergyrecovery

PreferentialLoadingproduction

(supply)distribution

(demand)heat-recoverychiller

inasidestreampiping

arrangementbypasslineapplicationTIPprescriptiveHVACrequirements

ExhaustHoodsKitchenhoods>5,000cfm:

Providemakeupair≥50%ofexhaustairvolumeFumehoodsiftotalcapacity>15,000cfm:Capabilitytoreduceexhaustandmakeup-airvolumesto≤50%orDirectmakeup-airsupply≥75%ofexhaustrateatspecifiedconditionsorHeatrecoverytopreconditionmakeupairprescriptiveHVACrequirements

RadiantHeatingRequiredfor

unenclosedspacesException:

LoadingdockswithaircurtainsMaximumHGBPcapacity,

%oftotalcapacityRatedcapacity

ofsystem≤240,000Btu/h 50%>240,000Btu/h 25%prescriptiveHVACrequirements

HotGasBypassLimitationAppliedinsystemswithsteppedor

continuousunloadingLimitationalsopertainstochillersException:Packagedunitarysystems

≤90,000Btu/h(7.5tons)section7:

ServiceWaterHeatingMandatoryprovisions:EquipmentefficiencyPipinginsulationSWHsystemcontrols(temperature,pumpoperation)PoolheatersandcoversPrescriptiverequirements:SpaceandwaterheatingServicewaterheatingASHRAEStandard90.1Section9:

Lightingsection9:lighting

ScopeLightingcontrolInteriorspacesExteriorbuildingfeaturesandgroundslightingLightingpowerInteriorspacesExteriorbuildingfeaturesandgroundslightingBuildingtypeanduseexistingbuildings:

LightingAlterationsReplacementlightingsystemsmustmeetlightingpowerdensityrequirementsNewcontroldevicesmustcomplywithmandatoryprovisionsException:

Replacing<50%ofluminairesmandatoryprovisions

InteriorLightingControlAtleastonecontrolin

eachspaceAutomaticshutofffor

buildings>5,000ft²Time-o