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AAMA Releases Voluntary Test Method for Thermal Transmittance and Condensation Resistance

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Apr 21, 2009

AAMA 1503-09, a voluntary test method for windows, doors and glazed wall sections, has been released by the American Architectural Manufacturers Association (AAMA). 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 over 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.

“AAMA 1503 has been investigated, researched, restructured and thoroughly evaluated by more scientists and interested parties than any other thermal performance test method,” says Ken Brenden, AAMA technical standards manager. “There is every reason to believe that AAMA 1503 is, by far, the industry’s most comprehensive and accurate method for directly testing for the air-to-air thermal transmittance and condensation characteristics of architectural products.”

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.

The Voluntary Test Method for Thermal Transmittance and Condensation Resistance of Windows, Doors and Glazed Wall Sections is available to members at a cost of $10 for download, $20 for paper copy and $25 for CD. Non-members may purchase the document at a cost of $25 for download, $50 for paper copy and $55 for CD. To order AAMA 1503-09, visit the AAMA Online Publication Store at ; call 847-303-5664; or write the American Architectural Manufacturers Association, 1827 Walden Office Square, Suite 550, Schaumburg, IL 60173. More information about AAMA and its activities can be found at .

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