Test method measures thermal characteristics

May 20, 2009
May 20, 2009 – The American Architectural Manufacturers Association (AAMA) has released a new voluntary test method,  AAMA 1503-09, for windows, doors and glazed wall sections.

The test method, titled Voluntary Test Method for Thermal Transmittance and Condensation Resistance of Windows, Doors and Glazed Wall Sections contains the latest improvements evolving from more than 25 years of thermal testing by AAMA accredited testing laboratories.

The test method measures the thermal characteristics of windows, doors and glazed exterior wall sections under steady-state conditions. Specifically, measurements and calculations made using this procedure can be utilized to determine the thermal transmittance (air-to-air) or U-Factor, the air infiltration rate and/or the condensation resistance factor.

For AAMA 1503-09, calibration techniques were changed to reflect the significant improvement in window thermal performance over the years and sealing against potential air infiltration has been improved. Other calibration and test techniques were also refined. In addition, a component was added to allow for testing of multiple glazing options via AAMA's 1505 glass library to provide simple, cost-effective and fully-tested U-factor and condensation resistance factor (CRF) values for the industry.


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