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RR-0901: Thermal Metrics for High Performance Walls—The Limitations of R-Value

By John Straube    Created: 2009/01/26

As the building industry strives to reduce energy consumption for environmental and economic reasons, building enclosures with high thermal performance, reliably and affordably installed in the field are required. The R-value was developed over 50 years ago to provide users and specifiers of insulation with and easy-to-compare, repeatable measure of insulation performance. The strength of the R-value is that it is simple to measure, easy to communicate, and widely accepted.

 

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