EN 12898:2001
Superseded
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
View Superseded by
superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
Glass in building - Determination of the emissivity
Superseded date
03-21-2019
Published date
01-24-2001
Publisher
Foreword
1 Scope
2 Symbols
3 Terms and definitions
4 Brief outline of the procedure to determine
corrected emissivity
5 Spectral normal reflectance and transmittance
measurements
6 Calculation of total normal reflectance, corrected
emissivity and total normal transmittance
7 Diffuse reflectance measurements
8 Test report
Annex A (normative) Tables for determining total normal
reflectance and total corrected emissivity
Annex B (informative) Procedures to improve the accuracy
of spectral normal reflectance measurements
Bibliography
This draft European Standard specifies a procedure for determining the emissivity at room temperature of the surfaces of glass, coated glass and other glazing components not transparent in the far infrared. The emissivity is necessary for taking into account heat transfer by radiation from surfaces at the standard temperature of 283 K in the determination of the U value and of the total solar transmittance of glazing according to B.1 to B.5.
| Committee |
CEN/TC 129
|
| DocumentType |
Standard
|
| PublisherName |
Comite Europeen de Normalisation
|
| Status |
Superseded
|
| SupersededBy |
| Standards | Relationship |
| NF EN 12898 : 2001 | Identical |
| NEN-EN 12898:2019 | Identical |
| I.S. EN 12898:2001 | Identical |
| UNI EN 12898 : 2002 | Identical |
| UNE-EN 12898:2001 | Identical |
| DIN EN 12898:2001-04 | Identical |
| NBN EN 12898 : 2001 | Identical |
| ONORM EN 12898 : 2001 | Identical |
| PN-EN 12898: 2019-04 | Identical |
| SN EN 12898 : 2001 | Identical |
| BS EN 12898:2019 | Identical |
| I.S. EN 12898:2019 | Identical |
| BS EN 12898:2001 | Identical |
| NEN EN 12898 : 2001 | Identical |
| NS EN 12898 : 1ED 2001 | Identical |
| PN EN 12898 : 2004 | Identical |
| UNI EN 12898:2019 | Identical |
| DIN EN 15752-1:2014-10 | GLASS IN BUILDING - ADHESIVE BACKED POLYMERIC FILM - PART 1: DEFINITIONS AND REQUIREMENTS |
| UNI EN 15755-1 : 2015 | GLASS IN BUILDING - ADHESIVE BACKED POLYMERIC FILMED GLASS - PART 1: DEFINITIONS AND REQUIREMENTS |
| BS EN 15682-2:2013 | Glass in building. Heat soaked thermally toughened alkaline earth silicate safety glass Evaluation of conformity/Product standard |
| BS EN 15752-1:2014 | Glass in building. Adhesive backed polymeric film Definitions and requirements |
| 01/105367 DC : DRAFT JULY 2001 | PREN 14179-2 - HEAT SOAKED THERMALLY TOUGHENED SODA LIME SILICATE SAFETY GLASS - PART 2: EVALUATION OF CONFORMITY |
| UNI EN 1279-5 : 2010 | GLASS IN BUILDING - INSULATING GLASS UNITS - PART 5: EVALUATION OF CONFORMITY |
| UNI EN 15682-2 : 2013 | GLASS IN BUILDING - HEAT SOAKED THERMALLY TOUGHENED ALKALINE EARTH SILICATE SAFETY GLASS - PART 2: EVALUATION OF CONFORMITY/PRODUCT STANDARD |
| DIN EN 1096-4:2015-06 (Draft) | GLASS IN BUILDING - COATED GLASS - PART 4: EVALUATION OF CONFORMITY/PRODUCT STANDARD |
| DIN EN ISO 12567-1:2010-12 | Thermal performance of windows and doors - Determination of thermal transmittance by the hot-box method - Part 1: Complete windows and doors (ISO 12567-1:2010) |
| BS EN 12337-2:2004 | Glass in building. Chemically strengthed soda lime silicate glass Evaluation of conformity/Product standard |
| BS EN 1096-1:2012 | Glass in building. Coated glass Definitions and classification |
| BS EN 673:2011 | Glass in building. Determination of thermal transmittance (U value). Calculation method |
| EN 1096-2:2012 | Glass in building - Coated glass - Part 2: Requirements and test methods for class A, B and S coatings |
| EN 1096-3:2012 | Glass in building - Coated glass - Part 3: Requirements and test methods for class C and D coatings |
| EN 12337-2:2004 | Glass in building - Chemically strengthened soda lime silicate glass - Part 2: Evaluation of conformity/Product standard |
| EN 12150-2:2004 | Glass in building - Thermally toughened soda lime silicate safety glass - Part 2: Evaluation of conformity/Product standard |
| EN 13024-2:2004 | Glass in building - Thermally toughened borosilicate safety glass - Part 2: Evaluation of conformity/Product standard |
| UNE-EN 410:2011 | Glass in building - Determination of luminous and solar characteristics of glazing |
| 08/30173305 DC : DRAFT JAN 2008 | BS EN 15755-1 - GLASS IN BUILDING - ADHESIVE BACKED POLYMERIC FILMED GLASS - PART 1: DEFINITIONS AND DESCRIPTION |
| DIN EN 15682-2:2013-10 | GLASS IN BUILDING - HEAT SOAKED THERMALLY TOUGHENED ALKALINE EARTH SILICATE SAFETY GLASS - PART 2: EVALUATION OF CONFORMITY/PRODUCT STANDARD |
| UNE-EN 15683-2:2014 | Glass in building - Thermally toughened soda lime silicate channel shaped safety glass - Part 2: Evaluation of conformity/Product standard |
| 12/30255284 DC : DRAFT APR 2012 | BS EN 1096-4 - GLASS IN BUILDING - COATED GLASS - PART 4: EVALUATION OF CONFORMITY - PRODUCT STANDARD |
| 01/105394 DC : DRAFT JULY 2001 | PREN 13024-2 - THERMALLY TOUGHENED BOROSILICATE SAFETY GLASS - PART 2: EVALUATION OF CONFORMITY |
| 09/30196724 DC : 0 | BS ISO 18292 - ENERGY PERFORMANCE OF FENESTRATION SYSTEMS - CALCULATION PROCEDURE |
| I.S. EN 1096-4:2004 | GLASS IN BUILDING - COATED GLASS - PART 4: EVALUATION OF CONFORMITY/PRODUCT STANDARD |
| PREN 12150-2 : DRAFT 2017 | GLASS IN BUILDING - THERMALLY TOUGHENED SODA LIME SILICATE SAFETY GLASS - PART 2: PRODUCT STANDARD |
| ISO 18292:2011 | Energy performance of fenestration systems for residential buildings Calculation procedure |
| UNI EN 15752-1 : 2015 | GLASS IN BUILDING - ADHESIVE BACKED POLYMERIC FILM - PART 1: DEFINITIONS AND REQUIREMENTS |
| 15/30319715 DC : 0 | BS EN 1279-5 - GLASS IN BUILDING - INSULATING GLASS UNITS - PART 5: EVALUATION OF CONFORMITY |
| PREN 14449 : DRAFT 2017 | GLASS IN BUILDING - LAMINATED GLASS AND LAMINATED SAFETY GLASS - PRODUCT STANDARD |
| I.S. EN 15682-2:2013 | GLASS IN BUILDING - HEAT SOAKED THERMALLY TOUGHENED ALKALINE EARTH SILICATE SAFETY GLASS - PART 2: EVALUATION OF CONFORMITY/PRODUCT STANDARD |
| EN 1096-4:2004 | Glass in building - Coated glass - Part 4: Evaluation of conformity/Product standard |
| DIN EN 12337-2:2005-01 | Glass in building - Chemically strengthened soda lime silicate glass - Part 2: Evaluation of conformity/Product standard; German version EN 12337-2:2004 |
| DIN EN 14178-2:2005-01 | Glass in Building - Basic alkaline earth silicate glass products - Part 2: Evaluation of conformity/Product standard |
| DIN EN 1279-5:2015-08 (Draft) | GLASS IN BUILDING - INSULATING GLASS UNITS - PART 5: EVALUATION OF CONFORMITY |
| DIN EN 14449:2005-07 | Glass in building - Laminated glass and laminated safety glass - Evaluation of conformity/Product standard |
| DIN EN 14321-2 E : 2005 | GLASS IN BUILDING - THERMALLY TOUGHENED ALKALINE EARTH SILICATE SAFETY GLASS - PART 2: EVALUATION OF CONFORMITY/PRODUCT STANDARD |
| UNE-EN 1096-2:2012 | Glass in building - Coated glass - Part 2: Requirements and test methods for class A, B and S coatings |
| BS EN 675:2011 | Glass in building. Determination of thermal transmittance (U value). Heat flow meter method |
| I.S. EN 673:2011 | GLASS IN BUILDING - DETERMINATION OF THERMAL TRANSMITTANCE (U VALUE) - CALCULATION METHOD |
| I.S. EN 675:2011 | GLASS IN BUILDING - DETERMINATION OF THERMAL TRANSMITTANCE (U VALUE) - HEAT FLOW METER METHOD |
| I.S. EN 1096-2:2012 | GLASS IN BUILDING - COATED GLASS - PART 2: REQUIREMENTS AND TEST METHODS FOR CLASS A, B AND S COATINGS |
| I.S. EN 674:2011 | GLASS IN BUILDING - DETERMINATION OF THERMAL TRANSMITTANCE (U VALUE) - GUARDED HOT PLATE METHOD |
| I.S. EN 1096-3:2012 | GLASS IN BUILDING - COATED GLASS - PART 3: REQUIREMENTS AND TEST METHODS FOR CLASS C AND D COATINGS |
| DIN EN 1036-2:2008-05 | GLASS IN BUILDING - MIRRORS FROM SILVER-COATED FLOAT GLASS FOR INTERNAL USE - PART 2: EVALUATION OF CONFORMITY - PRODUCT STANDARD |
| I.S. EN 410:2011 | GLASS IN BUILDING - DETERMINATION OF LUMINOUS AND SOLAR CHARACTERISTICS OF GLAZING |
| I.S. EN 1096-1:2012 | GLASS IN BUILDING - COATED GLASS - PART 1: DEFINITIONS AND CLASSIFICATION |
| DIN EN 15683-2:2014-02 | GLASS IN BUILDING - THERMALLY TOUGHENED SODA LIME SILICATE CHANNEL SHAPED SAFETY GLASS - PART 2: EVALUATION OF CONFORMITY/PRODUCT STANDARD |
| EN 1279-5:2005+A2:2010 | Glass in building - Insulating glass units - Part 5: Evaluation of conformity |
| UNE-EN 15752-1:2015 | Glass in building - Adhesive backed polymeric film - Part 1: Definitions and requirements |
| BS EN 15683-2:2013 | Glass in building. Thermally toughened soda lime silicate channel shaped safety glass Evaluation of conformity. Product standard |
| 09/30195952 DC : 0 | BS ISO 12567-1 - THERMAL PERFORMANCE OF WINDOWS AND DOORS - DETERMINATION OF THERMAL TRANSMITTANCE BY HOT-BOX METHOD - PART 1: COMPLETE WINDOWS AND DOORS |
| 01/105396 DC : DRAFT JULY 2001 | PREN 1096-4 - GLASS IN BUILDING - COATED GLASS - PART 4: EVALUATION OF CONFORMITY |
| ISO 12567-1:2010 | Thermal performance of windows and doors Determination of thermal transmittance by the hot-box method Part 1: Complete windows and doors |
| NF EN 1279-5 : 2005 + A2 2010 | GLASS IN BUILDING - INSULATING GLASS UNITS - PART 5: EVALUATION OF CONFORMITY |
| I.S. EN ISO 12567-1:2010 | THERMAL PERFORMANCE OF WINDOWS AND DOORS - DETERMINATION OF THERMAL TRANSMITTANCE BY THE HOT-BOX METHOD - PART 1: COMPLETE WINDOWS AND DOORS |
| BS EN 1096-4:2004 | Glass in building. Coated glass Evaluation of conformity/Product standard |
| PREN 1279-5 : DRAFT 2015 | GLASS IN BUILDING - INSULATING GLASS UNITS - PART 5: EVALUATION OF CONFORMITY |
| I.S. EN 1279-5:2005 | GLASS IN BUILDING - INSULATING GLASS UNITS - PART 5: EVALUATION OF CONFORMITY |
| DIN EN 14179-2:2005-08 | Glass in building - Heat soaked thermally toughened soda lime silicate safety glass - Part 2: Evaluation of conformity/Product standard |
| DIN EN 12150-2:2005-01 | Glass in building - Thermally toughened soda lime silicate safety glass - Part 2: Evaluation of conformity/Product standard; German version EN 12150-2:2004 |
| DIN EN 1863-2:2005-01 | Glass in building - Heat strengthened soda lime silicate glass - Part 2: Evaluation of conformity/Product standard; German version EN 1863-2:2004 |
| DIN EN 13024-2:2005-01 | Glass in building - Thermally toughened borosilicate safety glass - Part 2: Evaluation of conformity/Product standard; German version EN 13024-2:2004 |
| DIN EN 1096-2:2012-04 | Glass in building - Coated glass - Part 2: Requirements and test methods for class A, B and S coatings |
| DIN EN 673:2011-04 | Glass in building - Determination of thermal transmittance (U value) - Calculation method |
| DIN EN 1096-3:2012-04 | Glass in building - Coated glass - Part 3: Requirements and test methods for class C and D coatings |
| DIN EN 410:2011-04 | Glass in building - Determination of luminous and solar characteristics of glazing |
| DIN EN 14449 E : 2005 | GLASS IN BUILDING - LAMINATED GLASS AND LAMINATED SAFETY GLASS - EVALUATION OF CONFORMITY - PRODUCT STANDARD |
| DIN EN 675:2011-09 | Glass in building - Determination of thermal transmittance (U value) - Heat flow meter method |
| BS EN 14178-2:2004 | Glass in building. Basic alkaline earth silicate glass products Evaluation of conformity/Product standard |
| BS EN 410:2011 | Glass in building. Determination of luminous and solar characteristics of glazing |
| UNE-EN 1096-3:2012 | Glass in building - Coated glass - Part 3: Requirements and test methods for class C and D coatings |
| EN ISO 12567-1:2010/AC:2010 | Thermal performance of windows and doors - Determination of thermal transmittance by the hot-box method - Part 1: Complete windows and doors - Technical Corrigendum 1 (ISO 12567-1:2010/Cor 1:2010) |
| EN 673:2011 | Glass in building - Determination of thermal transmittance (U value) - Calculation method |
| EN 14449:2005/AC:2005 | GLASS IN BUILDING - LAMINATED GLASS AND LAMINATED SAFETY GLASS - EVALUATION OF CONFORMITY/PRODUCT STANDARD |
| UNI EN ISO 12567-1 : 2010 | THERMAL PERFORMANCE OF WINDOWS AND DOORS - DETERMINATION OF THERMAL TRANSMITTANCE BY THE HOT-BOX METHOD - PART 1: COMPLETE WINDOWS AND DOORS |
| UNI EN 1096-3 : 2012 | GLASS IN BUILDING - COATED GLASS - PART 3: REQUIREMENTS AND TEST METHODS FOR CLASS C AND D COATINGS |
| UNI EN 675 : 2011 | GLASS IN BUILDING - DETERMINATION OF THERMAL TRANSMITTANCE (U VALUE) - HEAT FLOW METER METHOD |
| UNI EN 14449 : 2005 | GLASS IN BUILDING - LAMINATED GLASS AND LAMINATED SAFETY GLASS - EVALUATION OF CONFORMITY/PRODUCT STANDARD |
| UNI EN 673 : 2011 | GLASS IN BUILDING - DETERMINATION OF THERMAL TRANSMITTANCE (U VALUE) - CALCULATION METHOD |
| UNI EN 410 : 2011 | GLASS IN BUILDING - DETERMINATION OF LUMINOUS AND SOLAR CHARACTERISTICS OF GLAZING |
| UNI EN 1096-2 : 2012 | GLASS IN BUILDING - COATED GLASS - PART 2: REQUIREMENTS AND TEST METHODS FOR CLASS A, B AND S COATINGS |
| UNI EN 674 : 2011 | GLASS IN BUILDING - DETERMINATION OF THERMAL TRANSMITTANCE (U VALUE) - GUARDED HOT PLATE METHOD |
| UNI EN 1096-1 : 2012 | Glass in building - Coated glass - Part 1: Definitions and classification |
| DIN EN 674:2011-09 | Glass in building - Determination of thermal transmittance (U value) - Guarded hot plate method |
| 11/30244798 DC : 0 | BS EN 1096-2 - GLASS IN BUILDING - COATED GLASS - PART 2: REQUIREMENTS AND TEST METHODS FOR CLASS A, B AND S COATINGS |
| 02/100471 DC : DRAFT JAN 2002 | PREN 14321-2 - GLASS IN BUILDING - THERMALLY TOUGHENED ALKALINE EARTH SILICATE SAFETY GLASS - PART 2: EVALUATION OF CONFORMITY |
| 01/105368 DC : DRAFT JULY 2001 | PREN 12337-2 - GLASS IN BUILDING - CHEMICALLY STRENGTHENED SODA LIME SILICATE GLASS - PART 2: EVALUATION OF CONFORMITY |
| BS EN 15755-1:2014 | Glass in building. Adhesive backed polymeric filmed glass Definitions and requirements |
| PREN 1096-3 : DRAFT 2011 | GLASS IN BUILDING - COATED GLASS - PART 3: REQUIREMENTS AND TEST METHODS FOR CLASS C AND D COATINGS |
| PREN 14179-2 : DRAFT 2017 | GLASS IN BUILDING - HEAT SOAKED THERMALLY TOUGHENED SODA LIME SILICATE SAFETY GLASS - PART 2: PRODUCT STANDARD |
| I.S. EN 15683-2:2013 | GLASS IN BUILDING - THERMALLY TOUGHENED SODA LIME SILICATE CHANNEL SHAPED SAFETY GLASS - PART 2: EVALUATION OF CONFORMITY/PRODUCT STANDARD |
| UNE-EN 15755-1:2015 | Glass in building - Adhesive backed polymeric filmed glass - Part 1: Definitions and requirements |
| BS EN 1863-2:2004 | Glass in building. Heat strengthened soda lime silicate glass Evaluation of conformity. Product standard |
| UNE-EN 1096-1:2012 | Glass in building - Coated glass - Part 1: Definitions and classification |
| BS EN 674:2011 | Glass in building. Determination of thermal transmittance (U value). Guarded hot plate method |
| BS EN ISO 12567-1:2010 | Thermal performance of windows and doors. Determination of thermal transmittance by the hot-box method Complete windows and doors |
| BS EN 14321-2:2005 | Glass in building. Thermally toughened alkaline earth silicate safety glass Evaluation of conformity/Product standard |
| UNE EN 410 : 2011 | GLASS IN BUILDING - DETERMINATION OF LUMINOUS AND SOLAR CHARACTERISTICS OF GLAZING |
| BS EN 14449:2005 | Glass in building. Laminated glass and laminated safety glass. Evaluation of conformity/product standard |
| BS EN 1096-2:2012 | Glass in building. Coated glass Requirements and test methods for class A, B and S coatings |
| EN 14178-2:2004 | Glass in building - Basic alkaline earth silicate glass products - Part 2: Evaluation of conformity/Product standard |
| EN 15683-2:2013 | Glass in building - Thermally toughened soda lime silicate channel shaped safety glass - Part 2: Evaluation of conformity/Product standard |
| EN 14321-2:2005 | Glass in building - Thermally toughened alkaline earth silicate safety glass - Part 2: Evaluation of conformity/Product standard |
| EN 674:2011 | Glass in building - Determination of thermal transmittance (U value) - Guarded hot plate method |
| EN 410:2011 | Glass in building - Determination of luminous and solar characteristics of glazing |
| EN 15682-2:2013 | Glass in building - Heat soaked thermally toughened alkaline earth silicate safety glass - Part 2: Evaluation of conformity/Product standard |
| EN 15752-1 : 2014 | GLASS IN BUILDING - ADHESIVE BACKED POLYMERIC FILM - PART 1: DEFINITIONS AND REQUIREMENTS |
| EN 15755-1 : 2014 | GLASS IN BUILDING - ADHESIVE BACKED POLYMERIC FILMED GLASS - PART 1: DEFINITIONS AND REQUIREMENTS |
| EN 1863-2:2004 | Glass in building - Heat strengthened soda lime silicate glass - Part 2: Evaluation of conformity/Product standard |
| EN 675:2011 | Glass in building - Determination of thermal transmittance (U value) - Heat flow meter method |
| EN 14179-2:2005 | Glass in building - Heat soaked thermally toughened soda lime silicate safety glass - Part 2: Evaluation of conformity/Product standard |
| UNE-EN 15682-2:2014 | Glass in building - Heat soaked thermally toughened alkaline earth silicate safety glass - Part 2: Evaluation of conformity/Product standard |
| PREN 1096-1 : DRAFT 2011 | GLASS IN BUILDING - COATED GLASS - PART 1: DEFINITIONS AND CLASSIFICATION |
| 11/30244801 DC : 0 | BS EN 1096-3 - GLASS IN BUILDING - COATED GLASS - PART 3: REQUIREMENTS AND TEST METHODS FOR CLASS C AND D COATINGS |
| DIN EN 15755-1:2014-10 | GLASS IN BUILDING - ADHESIVE BACKED POLYMERIC FILMED GLASS - PART 1: DEFINITIONS AND REQUIREMENTS |
| ISO 15099:2003 | Thermal performance of windows, doors and shading devices — Detailed calculations |
| BS ISO 18292:2011 | Energy performance of fenestration systems for residential buildings. Calculation procedure |
| I.S. EN 15752-1:2014 | GLASS IN BUILDING - ADHESIVE BACKED POLYMERIC FILM - PART 1: DEFINITIONS AND REQUIREMENTS |
| 11/30244795 DC : 0 | BS EN 1096-1 - GLASS IN BUILDING - COATED GLASS - PART 1: DEFINITIONS AND CLASSIFICATION |
| UNI EN 15683-2 : 2014 | GLASS IN BUILDING - THERMALLY TOUGHENED SODA LIME SILICATE CHANNEL SHAPED SAFETY GLASS - PART 2: EVALUATION OF CONFORMITY/PRODUCT STANDARD |
| 12/30266553 DC : 0 | BS EN 16477-2 - GLASS IN BUILDING - PAINTED GLASS FOR INTERNAL USE - PART 2: EVALUATION OF CONFORMITY |
| PREN 1096-2 : DRAFT 2011 | GLASS IN BUILDING - COATED GLASS - PART 2: REQUIREMENTS AND TEST METHODS FOR CLASS A, B AND S COATINGS |
| BS EN 1279-5 : 2005 | GLASS IN BUILDING - INSULATING GLASS UNITS - PART 5: EVALUATION OF CONFORMITY |
| I.S. EN 15755-1:2014 | GLASS IN BUILDING - ADHESIVE BACKED POLYMERIC FILMED GLASS - PART 1: DEFINITIONS AND REQUIREMENTS |
| DIN EN 1096-1:2012-04 | Glass in building - Coated glass - Part 1: Definitions and classification |
| BS EN 1096-3:2012 | Glass in building. Coated glass Requirements and test methods for class C and D coatings |
| UNE-EN 673:2011 | Glass in building - Determination of thermal transmittance (U value) - Calculation method |
| BS EN 1036-2:2008 | Glass in building. Mirrors from silver-coated float glass for internal use Evaluation of conformity; product standard |
| BS EN 12150-2:2004 | Glass in building. Thermally toughened soda lime silicate safety glass Evaluation of conformity/Product standard |
| BS EN 13024-2:2004 | Glass in building. Thermally toughened borosilicate safety glass Evaluation of conformity/Product standard |
| BS EN 14179-2:2005 | Glass in building. Heat-soaked thermally-toughened soda lime silicate safety glass Evaluation of conformity/product standard |
| EN 1036-2:2008 | Glass in building - Mirrors from silver-coated float glass for internal use - Part 2: Evaluation of conformity; product standard |
| EN 1096-1:2012 | Glass in building - Coated glass - Part 1: Definitions and classification |
| DIN EN 14321-2:2005-10 | Glass in building - Thermally toughened alkaline earth silicate safety glass - Part 2: Evaluation of conformity/Product standard |
| UNE-EN 1279-5:2006 | Glass in building - Insulating glass units - Part 5: Evaluation of conformity |
| EN 673:2011 | Glass in building - Determination of thermal transmittance (U value) - Calculation method |
| EN 410:2011 | Glass in building - Determination of luminous and solar characteristics of glazing |
| EN 674:2011 | Glass in building - Determination of thermal transmittance (U value) - Guarded hot plate method |
| EN 675:2011 | Glass in building - Determination of thermal transmittance (U value) - Heat flow meter method |
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