2009 IECC vs 2010 IECC

Green Building

2009 IECC vs 2010 IECC


In the State of Indiana, virtually all new construction projects involving Class 1 structures need to file with the Division of Fire and Building Safety.

As part of the filing process, project teams must demonstrate that the new construction complies with the state’s energy code, the 2010 Indiana Energy Conservation Code (2010 IECC).

Interestingly, the acronym for Indiana’s energy code is “IECC” – the same acronym adopted by the International Code Council for their International Energy Conservation Code. This has been a source of confusion for many design teams.


2009 IECC = 2009 International Energy Conservation Code

The International Code Council (ICC) has instituted a three-year update cycle for the International Energy Conservation Code. An edition was released in 2006 and 2009. The next edition will be released in 2012. With regard to the ICC and the International Energy Conservation Code, there is no such thing as a 2010 IECC.


2010 IECC = 2010 Indiana Energy Conservation Code

(i.e., ASHRAE Standard 90.1-2007 with Indiana amendments).

Indiana Administrative Code, Title 675 Fire Prevention and Building Safety CommissionArticle 19 Energy Conservation Codes, Rule 4 (675 IAC 19-4) identifies the 2010 Indiana Energy Conservation Code as follows:

Sec. 1. That certain document, being titled the Energy Standard for Buildings Except Low-Rise Residential Buildings, I-P Edition, ANSI/ASHRAE 90.1, 2007 Edition, published by the American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc. 1791 Tullie Circle NE, Atlanta, Georgia 30329, is hereby adopted by reference as if fully set out in this rule save and except those revisions made in sections 2 through 11 of this rule.

This language clearly identifies ASHRAE Standard 90.1-2007 as the basis for the 2010 IECC, to which Indiana has added various amendments.


2010 IECC = ASHRAE Standard 90.1-2007

It should also be noted that even with the Indiana amendments, the US Department of Energy (DOE) has identified the 2010 IECC to be “as stringent as the 2009 IECC.


2010 IECC Compliance Reports via COMcheck™

Section 5.7.1 of 675 IAC 19-4 states that for construction projects filed for which a design professional is required, design teams must provide one of the following, signed and sealed by the design professional, in order to demonstrate compliance:

(a) A Compliance Report, from an accepted computer compliance tool such as ComCheck (www.energycodes.gov/comcheck/) or other prescriptive compliance software or other methods approved by the Division, demonstrating compliance with the requirements of the Indiana Energy Conservation Code, 2010 edition (675 IAC 19-4).

(b) A report from a comprehensive energy modeling program and an affidavit signed and sealed by the design professional affirming that the tools used to simulate the design energy performance indicate that the submitted design will meet or exceed the requirements of the Indiana Energy Conservation Code, 2010 edition (675 IAC 19-4).

A couple of points need to be made here.

First, the IAC only requires the compliance report to be signed and sealed by the design professional. It does not require that a design professional’s consulting engineer(s) also provide such information.

Second, the COMcheck™ software is maintained by the US DOE’s Office of Energy Efficiency and Renewable Energy (EERE) for nationwide application. As such, the software does not provide the option to run a compliance report using Indiana’s 2010 IECC specifically. All references to “IECC” by the COMcheck™ software are calling out the international codes from the ICC.


In Conclusion

For construction projects in Indiana, the design professional must select ASHRAE Standard 90.1-2007 in order to run a compliance report demonstrating compliance with the 2010 IECC. Be careful not to confuse the 2010 Indiana Energy Conservation Code (based on ASHRAE Standard 90.1-2007) with the 2009 International Energy Conservation Code (which is developed by the International Code Council).

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