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Introduction | Details of Test Section Construction
Instrumentation and Test Procedures |
Test Results | Conclusion
Oak Ridge National Laboratory Hot Box Test Results
The Buildings Technology Center at the Oak Ridge National Laboratory (ORNL) did steady-state guarded hot box tests in its Large Scale Climate Simulator (LSCS) in August 2006 to compare the thermal performance of a 6”, R-19 draped insulation installed “over the purlin” and Thermal Design’s Simple Saver System in standing-seam metal roofs with purlins 5 ft oc. The hot box tests conclude that the “over the purlin” configuration's overall performance is only 45% of that for the Simple Saver configuration. It also confirms that the 6”, R-19 draped insulation does not meet ASHRAE 90.1-2004 minimum U-value roof requirements of 0.065 (installed R-value of R-15.3) in heated and cooled metal buildings.
ASHRAE 90.1-2004 Building Envelope Requirements For Climate Zone 1-8 Tables: 5.5-1 to 5.5-8 |
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| Nonresidential Roofs |
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Climate Zones |
Opaque Elements |
Assembly Maximum |
Insulation Minimum R-value |
Climate Zone 1 |
Metal Building |
U-0.065 |
R-19.0 |
Climate Zone 2 |
Metal Building |
U-0.065 |
R-19.0 |
Climate Zone 3 |
Metal Building |
U-0.065 |
R-19.0 |
Climate Zone 4 |
Metal Building |
U-0.065 |
R-19.0 |
Climate Zone 5 |
Metal Building |
U-0.065 |
R-19.0 |
Climate Zone 6 |
Metal Building |
U-0.065 |
R-19.0 |
Climate Zone 7 |
Metal Building |
U-0.065 |
R-19.0 |
Climate Zone 8 |
Metal Building |
U-0.049 |
R-13.0 + R-19.0 |
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