ASTM E1423-99
Historical Standard: ASTM E1423-99 Standard Practice for Determining the Steady State Thermal Transmittance of Fenestration Systems
SUPERSEDED (see Active link, below)
ASTM E1423
1. Scope
1.1 This practice specifies standard test specimen sizes and test conditions, as well as the calculation and presentation of the thermal transmittance and conductance data measured in accordance with Test Method C1199. The standard sizes and conditions are to be used for fenestration product comparison purposes. The specifier may choose other sizes and conditions for product development or research purposes.
1.2 This practice refers to the thermal transmittance, , thermal conductance, , and the corresponding thermal resistances, u and Rc , respectively, of a fenestration system installed vertically in the absence of solar and air leakage effects.
Note 1-To determine air leakage effects for windows and doors, Test Methods E283 and E1424 should be referenced. For solar effects, ANSI/ASHRAE Standard 74-1988 should be referenced.1.3 A discussion of the definitions and underlying assumptions for determining the thermal transmittance and thermal conductance is included.
1.4 This practice specifies the procedure for determining the standardized thermal transmittance using the experimentally determined thermal conductance, , and specified values of the room-side and weather-side surface conductances, I and hII , respectively.
1.5 This standard does not purport to address all of the safety problems, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
ASTM Standards
C168 Terminology Relating to Thermal Insulation
C1199 Test Method for Measuring the Steady-State Thermal Transmittance of Fenestration Systems Using Hot Box Methods
C1363 Test Method for Thermal Performance of Building Materials and Envelope Assemblies by Means of a Hot Box Apparatus
E283 Test Method for Determining Rate of Air Leakage Through Exterior Windows, Curtain Walls, and Doors Under Specified Pressure Differences Across the Specimen
E631 Terminology of Building Constructions
E783 Test Method for Field Measurement of Air Leakage Through Installed Exterior Windows and Doors
E1424 Test Method for Determining the Rate of Air Leakage Through Exterior Windows, Curtain Walls, and Doors Under Specified Pressure and Temperature Differences Across the Specimen
Other Documents
NFRC102-2002 Available from National Fenestration Rating Council, 1300 Spring Street, Suite 500, Silver Spring, MD 20910.Keywords
doors; fenestration; heat; heat transfer; hot box; sky-light; steady state; surround panel; thermal perofrmance; transmittance; U-factor; windows;
ICS Code
ICS Number Code 91.060.50 (Doors and windows); 91.120.10 (Thermal insulation of buildings)
DOI: 10.1520/E1423-99
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