Calculates an opaque wall or fenestration U-factor based upon the Total UA alternative compliance method permitted by the International Code Council’s 2012 International Energy Conservation Code (IECC) or International Residential Code (IRC). This new Energy UA Calculator is consistent with AWC’s Design for Code Acceptance 7, “Meeting Residential Energy Requirements with Wood-Frame Construction.” For use with the 2012 IECC or IRC, the AWC Energy UA Calculator app also gives insulation requirements needed in various wood wall assemblies to achieve the specified opaque wall U-factor. Wall assembly configurations calculated by the app include 2×4 and 2×6 wood framing at 16” and 24” on-center spacing as well as several cladding and sheathing options.