BE9: Window and skylight U-factor and Solar Heat Gain Coefficient(SHGC) meets IECC 2015 + Georgia Amendments

Requirements are based on Climate Zone of project location:

Purpose

The U-Factor determines how well your windows insulate your home and the Solar Heat Gain Coefficient (SHGC) is a measure of how much solar-radiated heat energy can transfer through a window. To maximize energy efficiency, window and skylights must be carefully selected to comply with the IECC U-factor and SHGC specifications.

Criteria

See above language and reference the IECC 2015 with Georgia Amendments for further specification details.

Clarifications 

• The above chart references the 2015 IECC with Georgia Amendments. Where local code is more stringent defer to the higher performing U-factor or SHGC.
• Up to 15 square feet of glazing or decorative glass may be exempt from this requirement. 
• Floor area must be calculated using RESNET standards for conditioned floor area. 

Confirmation 

• The builder must present documentation demonstrating compliance of criteria to the EarthCraft Technical Advisor prior to the mid-construction inspection.  
• The EarthCraft Technical Advisor will review documentation provided by the builder for compliance of criteria and verify installation during the mid-construction inspection.