Heat Flow Meter
Over 30 years experience testing condensation resistance (CRF) factor and
thermal transmittance (U-factor).
Used to determine material-specific conductance for specimens up to 8” thick.
Developed AAMA 1505 standard for products with multiple glazing options
Constructed special apparatus to measure six regions of specimen, including
non-homogenous materials in any direction to determine effects of gravity.
Enables benchmark comparisons to simplify decision-making about
For over thirty years, manufacturers have been subjecting windows, doors, and
glazed wall sections to testing conducted under the AAMA 1503 standard. This
standard is employed to derive the condensation resistance (CRF) factor and
thermal transmittance (U-factor). These factors are then used to evaluate the
relative thermal performance between products and the conditions under which
condensation may form. But to perform complete AAMA 1503 testing, every glazing
option must be investigated in its own frame, which is an expensive process.
Consequently, Architectural Testing has helped AAMA develop an alternative standard,
Voluntary test methods for thermal performance of fenestration products with
multiple glazing options.
This new test method is accurate, yet more economical than AAMA 1503,
because it is more flexible. It enables accurate projections of performance for
any type of glazing. It can account for low-E(e), gas-filled, films, and spacer
variations, as well as variations in size, geometry, corners, hardware, and
design characteristics not addressed by typical modeling programs. With this
method, manufacturers can accurately and economically determine the effects of
variables in designs and materials. Architects can also get values that
translate accurately for non standard product sizes.
Back to Top
Architectural Testing conducts AAMA 1505 testing using a specially constructed apparatus that
measures six regions of the specimen to account for characteristics in the
inner and outer areas of the glazing. Advanced sensors detect temperatures with
a 0.01 degree tolerance. The device can measure non-homogenous materials. The
apparatus can also rotate the specimen up, down, or sideways to determine how
gravity may affect convection.
AAMA 1505 includes a baseline test to determine the CRF factor for the frame and
the glazing using a glass data library that includes over 100 glazing
variations. A glass-substitution procedure is then employed to determine the
performance of the baseline window as a constant.
Using this constant, any glazing option can be evaluated as a discrete
material, which eliminates the need to incorporate each glazing option into a
frame that is physically positioned in a test-chamber wall. Tests can be run on
the glazing itself, with frame values factored back in.
The baseline factors are determined under the conditions established by the
AAMA 1503 standard, namely under winter, night-time conditions that simulate 70°
F on the interior side of the sample and 0° F on the exterior
side of the sample.
Back to Top
Insights and Possibilities
Many variables affect the performance and service life of fenestration products
and building materials. That’s why Architectural Testing offers a comprehensive range of laboratory, environmental,
and field test programs. With Architectural Testing, you get the convenience of testing solar transmittance, thermal,
durability, impact, and other performance parameters administered by one firm with facilities located on both coasts
and in the Midwest.
Thanks to consistent Architectural Testing procedures, all data and reports are professionally compiled in standard
- Technical reports for performance evaluation of materials or components.
- Statistical analysis of lab data.
- Technical reports on problems, obstacles, or risks.
Our customers draw upon our expertise in over 700 test methods performed in accordance with ASTM, AAMA, ANSI, military,
and international standards, including ICC. And we continue to develop procedures and apply new test methods to meet
Back to Top
Learn more about how the Architectural Testing Difference
can help you or Contact Us today.