IRC2018N1103.3

Duct Sealing and Insulation

Plain-English Explanation

Section N1103.3 establishes energy efficiency requirements for duct sealing and insulation. These requirements help reduce energy costs and ensure your home meets minimum insulation and efficiency standards for your climate zone.

For the Contractor

Per IECC N1103.3 (Duct Sealing and Insulation): verify R-values, U-factors, and SHGC meet climate zone requirements per Table R402.1.2. Document insulation labels and depths before covering.