2018 IECC Component Performance Alternative

Back to Insights

August 04, 2020 by Caitlin Gamache, P.E.

Based on the Massachusetts amendment to Sections C401.2 and C402.1.5 of the 2018 IECC, the IECC component performance alternative (sometimes referred to as the “backstop calculation”) is required in Massachusetts for projects following ASHRAE 90.1-2016 Appendix G (or ASHRAE 90.1-2013 Appendix G if following the Stretch Energy Code).  This will require a minimal prescriptive compliance for the exterior envelope in addition to the thermal performance established by using Appendix G.  The impacts of this amendment diverge from previous iterations of energy efficiency design compliance and should be reviewed by key project stakeholders including the project architect, mechanical engineer, and envelope consultant.

Please do not hesitate to contact us if you have energy code scoping questions and how they apply to your specific project

Application of any information provided, for any use, is at the reader’s risk and without liability to Code Red Consultants. Code Red Consultants does not warrant the accuracy of any information contained in this blog as applicable codes and standards change over time. The application, enforcement and interpretation of codes and standards may vary between Authorities Having Jurisdiction and for this reason, registered design professionals should be consulted to determine the appropriate application of codes and standards to a specific scope of work.