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8Thermalperformanceindicateshowmuchheatcanbeinhibitedfromtransferring.Heattransfersfromthehighertemperaturesidetothelowertemperaturesideuntilthetemperaturesofthebothsidesbecomethesamelevel.Ceiling,wallorfloormaterialsusedforconstructionsvaryinthermalperformance.Itisimportanttodeterheattransfertotheminimumbyselectingpropermaterials.Heatfromtheair-conditioningequipmentforapleasanthousinglifeisconstantlymovingasconvections,radiationsandtransmissions,throughwindows,wallsorceilingthatareexposedtotheoutdoorair.Observingtheheattransferperunitareaofgeneralconstructions,itcanbefoundoutthatheattransfersespeciallythroughwindows.Thismeansthatimprovementofwindows’thermalperformanceisoneofthemostimportantfactorsforenergysaving.Thermalperformanceisrepresentedbyclassificationbasedonthermalresistance(R-value).Thefigurethatdisplayshowmuchwatts{kcal}ofheatcanshiftpersquaremeterperhour,whenthetemperaturedifferencebetweenoutdoorandindoorismorethan1ºC,iscalledthermalconductivity(K-value:W/m²·K{Kcal/m²·h·ºC})*3.Thermalresistance*4isdescribedbyaninversenumberofthethermalconductivity(R-value:1/K-value:m²·K/W{m²·h·ºC/Kcal}).(Refertotheendofthismanualfor*3and*4)SummerHeatWinterDescriptionofthethermalperformanceThermalperformancePerformanceclassificationandresidentialenvironmentForexample,windowsanddoorsetswithH-5classofthermalperformanceallow40Kcalofheattoescapepersquaremeterandperhour,whenthetemperaturedifferencebetweenoutdoorandindooris20ºC.LowerHigherClassesH-1H-2H-3H-4H-5Thermalresistance(R-value)m2·K/W{m2·h·˚C/Kcal}0.215andabove(0.25andabove)0.246andabove(0.29andabove)0.287andabove(0.33andabove)0.344andabove(0.40andabove)0.430andabove(0.50andabove)Thermalconductivity(K-value):ReferencevaluesKcal/m2·h·˚C4.0andbelow3.5andbelow3.0andbelow2.5andbelow2.0andbelow(1)ClassificationofthermalperformanceClassificationofthermalperformanceisspecifiedinJISA4706andJISA4702regulationsasshowninthetablebelow.12
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9Conditions•Averagewindowdimensionsperhouse:36m2•Indoortemperature:20˚C•Stovewasusedfor17hoursaday•Heatvalueofkerosene:8,900Kcal/liter•AveragetemperaturesfromDecembertoFebruary:AveragetemperatureintheChronologicalScientificTableof1961to1990Conditions•Zone:Tokyo(ZoneIV)•Averagewindowdimensionsperhouse=36m²•Temperaturedifferencebetweenoutdoorandindoor4ºC•Air-conditioningequipmentwasusedfor10hoursaday•Air-conditioningequipmentwasusedfor90days•Coolingcapacity:2,500Kcal/kwhIftheheatvalueofanair-conditionerthatescapedfromwindowsinsummertimeisconvertedintotheelectricalenergy…•IfyouinstalltheTHERMALII…youcansave186kwh(Electricalenergylossfromnormalwindows:290kwhElectricalenergylossfromtheTHERMALII:104kwh)ClassesNormalwindowH-1H-3H-4H-5Thermalconductivity(conversiontoclass)5.64.03.02.52.0ProductsATMOSII/CTPanelATMOSII/PGPanelThermalIIDuplexMeisterII(LOW-EPG)ZoneI1077liters769liters577liters481liters385litersCitySapporoAveragetemperature(DecembertoFebruary)-3.3°CNumberofdaysstovewasused120days308literssaved500literssaved596literssaved692literssavedZoneII665liters475liters356liters297liters238litersCityAomoriAveragetemperature(DecembertoFebruary)0.8°CNumberofdaysstovewasused90days190literssaved309literssaved368literssaved428literssavedZoneIII620liters443liters332liters277liters222litersCitySendaiAveragetemperature(DecembertoFebruary)2.1°CNumberofdaysstovewasused90days177literssaved288literssaved343literssaved399literssavedZoneIV478liters342liters256liters214liters171litersCityTokyo(Osaka)Averagetemperature(DecembertoFebruary)6.2°C(6.4)Numberofdaysstovewasused90days137literssaved222literssaved265literssaved307literssaved(2)ThermalperformanceandresidentialenvironmentQuantitiesofheatthatescapesfromwindowsinwinterperiodcanbeconvertedintotheamountofkeroseneasdescribedbelow.
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