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1、AHRIStandard885(formerlyARIStandard885)2008StandardforProcedureforEstimatingOccupiedSpaceSoundLevelsintheApplicationofAirTerminalsandAirOutletsIMPORTANTSAFETYDISCLAIMERAHRIdoesnotsetsafetystandardsanddoesnotcertifyorguaranteethesafetyofanyproducts,co
2、mponentsorsystemsdesigned,tested,rated,installedoroperatedinaccordancewiththisstandard/guideline.Itisstronglyrecommendedthatproductsbedesigned,constructed,assembled,installedandoperatedinaccordancewithnationallyrecognizedsafetystandardsandcoderequire
3、mentsappropriateforproductscoveredbythisstandard/guideline.AHRIusesitsbesteffortstodevelopstandards/guidelinesemployingstate-of-the-artandacceptedindustrypractices.AHRIdoesnotcertifyorguaranteethatanytestsconductedunderthestandards/guidelineswillnotb
4、enon-hazardousorfreefromrisk.FOREWORDThisstandardhasbeendevelopedbytheAir-Conditioning,Heating,andRefrigerationInstitute(AHRI)forthepurposeofestablishingauniformindustryprocedureforestimatingSoundPressureLevelsinoccupiedspacesservedbyAirTerminalsand/
5、orairoutlets.AHRIStandard885establishesuniformapplicationpracticesformakingAirTerminalsoundpathattenuationcalculations.Suchstandardsandprocedureswillbeofmutualbenefittodesigners,engineers,consultants,buildingownersandotherusersforthepurposeofprovidin
6、gbuildingdesigninformationtomeetacousticgoals.ItshouldberecognizedthattheacousticalmodelsanddatausedinAHRIStandard885arebasedonthebestavailabledatafromboththeAmericanSocietyofHeating,RefrigeratingandAirConditioningEngineers(ASHRAE)andrecognizedindust
7、rysources.UseofAHRIStandard885acousticalcalculationproceduresshouldprovideamethodologyforsignificantlyimprovingthereliabilityofestimatingtheNCorRClevelsintheoccupiedspaceoverthemoresimplifiedacousticalmodelsthathaveoftenbeenusedinthepast.Theaccuracyo
8、fallestimationsdependsonasignificantbodyofexperienceaccumulatedwiththeuseofthisstandard.AHRIStandard885hasbeeninuseforseveralyearsnow,andhasbeenproventobeareliablemethodofsoundestimation.Wheretheactualenvironmentcloselymatchestheassumptions,uncertain
