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A Comparison of the Stringency of the 2001 IECC Versus the 2009 IECC and 2009 IRC
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This report documents the differences between the 2001 IECC , 2009 IECC and 2009 IRC. The three codes are compared using the climate zones proposed by the 2009 IECC for the State of Texas. The comparison is carried out using the same code-compliant simulation with input variables that reflect differences between the three codes.
Liu, Zi; Mukhopadhyay, Jaya; Haberl, Jeff; Yazdani, Bahman; Culp, Charles (2010). A Comparison of the Stringency of the 2001 IECC Versus the 2009 IECC and 2009 IRC. Available electronically from