ISO 13348 2025.docx

InternationalStandardISO13348Thirdedition2025-06FansTolerances,methodsofconversionandtechnicaldatapresentationVentilateursTolerances,methodesdeconversionetpresentationdesdonneestechniquesReferencenumberISO13348:2025(en)COPYRIGHTPROTECTEDDOCUMENT©ISO2025Allrightsreserved.Unlessotherwisespecified,orrequiredinthecontextofitsimplementation,nopartofthispublicationmaybereproducedorutilizedotherwiseinanyformorbyanymeans,electronicormechanical,includingphotocopying,orpostingontheinternetoranintranet,withoutpriorwrittenpermission.PermissioncanberequestedfromeitherISOattheaddressbeloworISO,smemberbodyinthecountryoftherequester.ISOcopyrightofficeCP401Ch.deBlandonnet8CH-1214Vernier,GenevaPhone:+41227490111Email:copyrightiso.orgWebsite:www.iso.orgPublishedinSwitzerlandPageContentsIntroductionvi1Scope12Normativereferences.13Termsanddefinitions24Symbolsandabbreviatedterms105Performancetolerancesforpurpose-designedfansandseries-producednon-certifiedfans135.1Informationtobeprovidedbythepurchaser135.1.1Operational135.1.2Tolerancegrade135.2Informationtobeprovidedbythefansupplier135.2.1Essentialinformation135.2.2Optionalparameters145.3Tolerances145.3.1Tolerancegrades145.4Purchasingarrangements165.5Contractualtesting165.5.1Tolerancemagnitudenearoptimumefficiency165.5.2Operationatotherthanoptimumefficiency205.5.3Performanceacceptancetesting216Performancetolerancesforseries-producedfansincertifiedratingsprogrammes.286.1General286.2Fanlaws286.3Check-tests286.4Airperformancetolerances296.4.1Check-testtolerances296.4.2AirflowTolerance296.4.3PowertoleranceTh316.4.4Efficiencytolerance336.4.5Otherefficiencymetrics336.4.6Applicationoftolerances336.5SoundTolerances336.5.1Check-Testtolerances336.5.2Soundtolerancesinoctavebands336.5.3Sonevaluetolerance336.5.4A-weightedsoundpowerlevel337PerformancetolerancesforCategoryEfans(freeinletandfreeoutletwithoutapartition)347.1General347.2PerformancetolerancesforJetfans347.3Performancetolerancesforcirculatingfans357.4Performancetolerancesforaircurtains358Methodsofconversion368.1Conversionofairperformancetestdata368.1.1General.368.1.2Similarity.368.1.3Conversionrulesandthefanlaws368.1.4Conversionrulesforseries-producedfans378.1.5Conversionrulesforextrapolation37Foreword.v8.1.6 Interpolationforfansincorporatingonesystematicgeometricalchange498.1.7 Otheridentities508.2Conversionofsoundpowertestdata518.2.1 General518.2.2 Conditionsandlimitsforapplicationofconversionrulestototalsoundpowerlevel518.2.3 Generalizedmethodsforsoundpowerlevelprediction519Technicaldatapresentation589.1 General589.2 Essentialinformation589.3 Fanperformancechart589.4 Additionalinformation609.4.1 Sounddata609.4.2 Electricaldata619.4.3 Mechanicaldata619.4.4 Airperformance619.4.5 Samefanusedfordifferentinstallations61Annex A (normative)Documentation64Annex B (normative)Marking65Annex C (informative)Systemresistanceasafunctionofflowrate66Annex D (informative)Scalingmethod69Bibliography76ForewordISO(theInternationalOrganizationforStandardization)isaworldwidefederationofnationalstandardsbodies(ISOmemberbodies).TheworkofpreparingInternationalStandardsisnormallycarriedoutthroughISOtechnicalcommittees.Eachmemberbodyinterestedinasubjectforwhichatechnicalcommitteehasbeenestablishedhastherighttoberepresentedonthatcommittee.Internationalorganizations,governmentalandnon-governmental,inliaisonwithISO,alsotakepartinthework.ISOcollaboratescloselywiththeInternationalElectrotechnicalCommission(IEC)onallmattersofelectrotechnicalstandardization.TheproceduresusedtodevelopthisdocumentandthoseintendedforitsfurthermaintenancearedescribedintheISO/IECDirectives,Part1.Inparticular,thedifferentapprovalcriterianeededforthedifferenttypesofISOdocumentshouldbenoted.ThisdocumentwasdraftedinaccordancewiththeeditorialrulesoftheISO/IECDirectives,Part2(Seewww.iso.org/directives).ISOdrawsattentiontothepossibilitythattheimplementationofthisdocumentmayinvolvetheuseof（八）patent(三).ISOtakesnopositionconcerningtheevidence,validityorapplicabilityofanyclaimedpatentrightsinrespectthereof.Asofthedateofpublicationofthisdocument,ISOhadnotreceivednoticeof（八）patent(三)whichmayberequiredtoimplementthisdocument.However,implementersarecautionedthatthismaynotrepresentthelatestinformation,whichmaybeobtainedfromthepatentdatabaseavailableatWWW.iso.org/patents.ISOshallnotbeheldresponsibleforidentifyinganyorallsuchpatentrights.Anytradenameusedinthisdocumentisinformationgivenfortheconvenienceofusersanddoesnotconstituteanendorsement.Foranexplanationofthevoluntarynatureofstandards,themeaningofISOspecifictermsandexpressionsrelatedtoconformityasses