2015 Energy Codes

The 2015 IECC is approximately 1% more energy efficient than the 2012 IECC

Major Changes

  • New Energy Rating Index (ERI) path for residential buildings
  • New Chapter five for existing residential and commercial buildings
  • Hot water piping insulation and length limits for commercial buildings
  • New daylighting controls, lighting operations and maintenance manual requirements for commercial buildings
  • Commercial air system economizers threshold was raised 

2015 IECC Resource Documents