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ASTM E1423-14
- Standard Practice for Determining Steady State Thermal Transmittance of Fenestration Systems
- standard by ASTM International, 04/01/2014
- Publisher: ASTM
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1.1 This practice covers 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.