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4ConsiderlocalconditionswhenyouselectForhousesonthewindsweptlocations(suchasvalleybetweenhigh-risebuildings,cliff,shorelineetc.),higherwatertightperformanceispreferable.Forhousesintheareawhererainstormhitfrequently,pleaseuseshuttersandeaves.Becarefulhowtoinstallglazingchannel.Installingconditionoftheglazingchannellikebelowmightmakewatereasiertopenetrate,therefore,pleasebecareful.(1)Whenthecornerisround(2)Whenajointisonthebottmrail(3)WhenajointiscrackedduetoshrinkageWerecommendputtingthejointonthetoprailtopreventwaterfrompenetratingthroughthegap.Moreover,consideringtheshrinkagewithage,wesuggestnottostraintheglazingchannelwhenyouinstall.PleasewatchtheExplanatoryvideoofair,waterandstructuralperformanceofaluminumwindowsanddoors(Refertotheendofthismanual).SealsolidlyJointpartsbetweenwindowsillordoorsill,andtheexteriorwallfinishorwoodframinghavetobesealedsolidlytokeepwatertightperformance.DownsizingmightaffectwaterintrusionDownsizingmightaffectperformancesdependingonsizesoffabricatedpartsorinstallationconditions.Pleasenotethefollowingbelow.Donotconductdownsizingwhichputsadrainhalloftheinnerrailbelowtheinnerpanel.Whentheairtightgasketinstalledonthetoprailorbottomrailarenotreachedtotheedgeoftheprofiles,orwhenapartofthegasketsiswavedordamaged,pleasechangethegaskets.Someproductsdonotacceptanydownsizing.Water-prooftapeforwindowsSealingStilebottmrailGlazingchannelExteriorwall(1)(2)(3)··Onepointadvice4
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5Airtightperformanceindicateshowmuchair(wind)cancomethroughgapsbetweenframeandpanelofwindowsanddoors.Windowsanddoorsthathavehighairtightperformanceareindemandtominimizeheatlossofcoolingandheating,ortoreducenoises,ortopreventdustsfromcomingin.Airtightperformanceisrepresentedbyclassificationbasedonhowmuchairleakedperhourpersquaremeter.Leakedairisrepresentedbym³/h•m².DescriptionoftheairtightperformanceAirtightperformancePerformanceclassificationandresidentialenvironmentForexample,windowclassifiedA-3isallowedtoleak8m³ofairpersquaremeterperhourinmaximum,whenthepressuredifferencebetweenoutsideandroomsideis10Pa{1.02kgf/m2}.ThismeansthattheDoubleslidingwindowwithitssizeof4560hasgapsequivalenttoaholeabout54mmindiameterintotal,andthesizeof6060hasgapsequivalenttoaholeabout64mmindiameterintotal.Ingeneral,onthesamewindowtypes,iftwowindowshavethesameclassofairtightperformance,thelargersizewindowhaspracticallybetterairtightperformancethanthesmallerone.Wheneachtwowindowshasdifferentstructures(e.g.DoubleslidingwindowandSingleslidingwindow),thesingleslidingwindowhaspracticallybetterairtightperformancethanthedoubleslidingwindow,evenifthetwohavethesamesizes.(1)ClassificationofairtightperformanceClassificationofairtightperformanceisspecifiedinJISA4706andJISA4702regulationsasshowninthetablebelow.LowerHigherClassesA-1A-2A-3A-4(Formerclasses)1203082A-3window2∼8m3/h·m2Pressure10Pa12
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