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2ClassW-3(formerclass25)watertightperformanceinATMOSIIorThermalIImeansthatwaterleakage*2doesnotoccurevenwhentheamountofrainfallisequivalentto240mm/handwindvelocityisequivalentto20m/s.(*2…Refertotheendofthismanual)Therainfallof240mm/hisbasedonthe10minutesrainfallrecordinJapan.Intheyear1946,wehadamostsevererainfallof49mmheightper10minutesatShimizuCityinShizuokaPrefecture.Thus,JISaddoptedtherainfallof40mmheightper10minutes(equivalenttothe240mm/hrainfall)tothewarertightperformancetest.However,windpressuresforthewatertightperformancetestsaredesignedlowerthanthatforwindloadresistancetest,becausemeteorologicalobservationrecordsinthepastsuggestthatstrongwindsandheavyrainrarelyoccursimultaneously.Inaddition,evenifwateraccumulatesontheinnerchannnelofwindowsill,JIScriteriaspecifiesthisacceptable.(Pleaserefertotherelateddescriptioninthesection3,“Featureofourproducts”)(1)ClassificationofwatertightperformanceClassificationofwatertightperformanceisspecifiedinJISA4706andJISA4702regulationsasshowninthetablebelow.LowerHigher(Note)Productsinthetableareourtypicalwindowsanddoors.Products(*1)and(*2)inthetablemightvaryinperformancedependingontypesandsizesasdescribedbelow.Pleaseseethecatalogsformoredetails.(*1):ClassofGlassLouverWindowforNCVOPERAisW-2.(*2):ClassofDoubleSlidingWindowforMeisterIIisW-3.(2)SelectionguidelinesWatertightperformanceinwindowsanddoorsetisselectedbasedonregionality,localcondition,serviceconditionandothers.Forresidentialwindows,W-3classofwatertightperformanceisselectedingeneral.ClassesW-1W-2W-3W-4W-5(Formerclasses)1015253550Pressuredifferences(Medianvalueofcyclicpressure)Pa100150250350500ClassesW-1W-2W-3W-4W-5(Formerclasses)1015253550IndicationofservicelocationHousingintheurbanareaBuildingintheurbanareaHighaltitudeorhighwindsiteOurproducts(Note)EntrancedoorRegnumAmbieTXPorteNXThermalIIATMOSIINCVOPERA(*1)MeisterII(*2)Performanceclassificationandresidentialenvironment2
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3Ourdoubleslidingwindowsaredividedroughlyintotwocategoriesasshownbelow.■StructureAisadoptedforresidentialwindowsforthereasonsbelow.(1)RequiredwatertightperformanceforresidentialwindowsisbetweenW-2toW-3.(2)ThestructureBproduceshighwatertightperformance,however,theairtightlinetoensurethisperformanceiseasilyinfluencedbyconstructionconditions.Therefore,itisdifficulttoadaptthisforgeneralwoodenhousepractically.(Forcommercialbuildingsforwhichwecanberesponsibleintermsofconstructionmanagement,thestructureBismainlyadopted.)■StructureAhasfeaturesshownbelow.Inthisstructure,watercanenterintotheinnerchannelwhenthewindowisexposedtothewaterandwindpressures.Evenwhenthewindowbecomesfreefromthepressures,watermightremainslightlyinthechannelduetosurfacetensionofaluminum.Someclientsmayhaveconcernsregardingthefactthatsomewaterremaininthechannel,however,thiscanhappenbecauseofstructuralfeaturesofresidentialwindows.Andthisisnotfromaperformancedefect.RegardingATMOSII,ataW-3classwatertighttestbasedonJIS,waterlevelbecomes23to25mm,whiletheheightofinsidedamis30mmasshownbelow.Inthisstructure,waterlevelisnotaffectedbywindpressurelevels,andstaysthesame.Watercanaccumulateonlytotheheightoftheouterraildescribedas(c)inthedrawing.Airtightgasketismountedonthehigherpositionthanthewaterlevel,sothattheairpressureintheoutersideoftheairtightmaterial(shadedareainthedrawing)becomesequivalenttotheoutdoorairpressure.Thisdesigninhibitswaterfrommoving,andmakesairtightperformancehigh.ABStructurewhichdoesnotcollectwateronwindowsillGravityofwaterInnerpanelandwindowsillInthisstructure,waterentersintothewindowsillbytheroute(a)duetowindpressures.Whenthewateraccumulatestosomedegrees,gravityofwaterpushesbacktheenteringwateratthelocation(b)andredressesthebalance.ATMOSIIandotherresidentialwindowsproducedbyothercompaniesarealladoptingthisstructure.Structurewhichcollectswateronwindowsill.WindpressureWindpressureWindpressureWaterlevelHeightofinsidedamWaterlevelWaterlevelWaterlevelHeightofinsidedam(b)(a)(c)RainwaterRainwaterOuterpanelandwindowsillRainwaterInnerchannelFeaturesofourproducts3
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