ASTM_E_2189_-_19.pdf

Designation:E218919Standard Test Method forTesting Resistance to Fogging in Insulating Glass Units1This standard is issued under the fixed designation E2189;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This test method covers procedures for testing theresistance to fogging of pre-assembled permanently sealedinsulating glass units or insulating glass units with capillarytubes intentionally left open or closed.1.2 This test method is applicable only to insulating glassunits that are constructed with glass or suspended film.1.3 This test method is applicable to both double-glazed andtriple-glazed insulating glass units;for triple-glazed insulatingglass units where both of the outer lites are glass and the innerlite is either glass or a suspended film.1.4 The unit construction used in this test method containsconstruction details that are essential components of the test.Different types of glass,different glass thicknesses,and differ-ent cavity sizes may affect the test results.1.5 This test method is not applicable to insulating glassunits containing a spandrel glass coating due to testing limita-tions.1.6 The values stated in SI units are to be regarded asstandard.The values given in parentheses after SI units areprovided for information only and are not considered standard.1.7 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.8 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2C162 Terminology of Glass and Glass ProductsC717 Terminology of Building Seals and SealantsE631 Terminology of Building ConstructionsE2188 Test Method for Insulating Glass Unit PerformanceE2190 Specification for Insulating Glass Unit Performanceand Evaluation3.Terminology3.1 Definition of Terms:3.1.1 For definitions of terms found in the standard,refer toTerminology C717,Terminology C162 and Terminology E631.3.2 Definitions of Terms Specific to This Standard:3.2.1 cavity,nthe space within an insulating glass unitcreated by the sealing system where water vapor is controlledto prevent the formation of condensation.Cavities may beair-filled or inert gas-filled.3.2.2 fog,nvisible deposits present after testing in accor-dance with Section 8 that were not present prior to testing.Fogdoes not include defects in a glass coating or the glass substratewhen examined prior to testing.3.2.3 internal components,nthe components of an insu-lating glass unit that typically do not contribute to water vaporcontrol of the cavity.Internal components may be decorative,such as false muntins,decorative glass,caming,and otherdecorative materials.Internal components may also befunctional,such as blinds or shades.3.2.4 sealing system,nthe components of an insulatingglass unit that together function to create the cavity and controlcavity water vapor content.Sealing system components typi-cally include a spacer,a desiccant,and sealant(s).4.Significance and Use4.1 This test method is intended to provide a means fortesting the resistance to fogging in insulating glass units.1This test method is under the jurisdiction of ASTM Committee E06 onPerformance of Buildings and is the direct responsibility of Subcommittee E06.22on Durability Performance of Building Constructions.Current edition approved April 1,2019.Published May 2019.Originallyapproved in 2002.Last previous edition approved in 2010 as E218910e1.DOI:10.1520/E218919.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1 4.2 This test method is also intended to provide a means fortesting the resistance to fogging caused by the volatility ofcomponents within the unit,including the sealing systemcomponents and internal compon