The Duke Energy RNC Program will be temporarily modifying the minimum required duct insulation in response to the Executive Order issued by North Carolina Governor Cooper (page 46, section 20.10) reducing the duct insulation requirement in unconditioned spaces from R-8 to R-4.2 in the North Carolina building code.

If the temporary order expires, the RNC Program will default back to the North Carolina building code for duct insulation requirements. This change will go live in Ekotrope in the coming weeks. The RNC Program team will provide updates as they become available.

Due to the complexity of calculations determining whether homes qualify for incentives in the RNC Program, participating builders should check with their Home Energy Raters when making specification changes to homes to ensure they still qualify in the Program, and to determine incentive impacts.