Support Information

Support Information

Frequently Asked Questions

What’s changed?
Changes between 2006 IECC and the 2009 IECC, including Hawaii amendments
Summary of Changes

Window area-weighted average calculation tool
This spreadsheet implements compliance calculations for window solar heat gain coefficient (SHGC), including shading credit for overhangs and screens.

Plan review checklists and design checklists
These voluntary checklists provide building designers and plan reviewers with a list of requirements and references to code sections. These checklists are based on the 2009 IECC with Hawaii amendments.

Residential design checklist

Residential plan review checklist

Commercial design checklist

Commercial plan review checklist


Hawaii State Energy Office contact for energy code issues: Howard Wiig,