Hello, all,

Does anyone know of a study that has compared the equivalency of the 2006 edition of the International Energy Conservation Code (IECC) compared to ASHRAE Standard 90.1-2004? It seems to me that they are roughly equivalent...The State of Wisconsin allows either one to show compliance with its energy code. Is there something credible I can refer to that states that they are essentially equivalent? An admittedly quick search I did came up with only some lighting comparisons.

Keith Swartz, P.E., LEED AP