The 2018 International Energy Conservation Code (IECC) is the official energy code for Texas, regulating residential and commercial energy efficiency standards.
On September 3, 2019, Texas adopted the 2018 IECC, replacing the 2015 IECC as the minimum statewide energy standard.
✔ Blower Door Testing – Mandatory for all new homes (≤5 ACH50 in Zones 2 & 3, ≤3 ACH50 in Zone 4).
✔ Duct Leakage Testing – Required if ducts are located outside conditioned space.
✔ Mechanical Ventilation – Must comply with ASHRAE 62.2.
✔ High-Efficiency Lighting – At least 90% of permanently installed fixtures must be LED, CFL, or fluorescent.
✔ Window & Insulation Upgrades – Homes must meet Texas-specific U-factor and SHGC limits.
Builders in Texas can comply with the 2018 IECC through the following methods:
✅ Prescriptive Path – Follow standard insulation, window, and system efficiency tables.
✅ Performance Path – Use energy modeling to demonstrate compliance.
✅ HERS Index (ERI Path) – Homes must meet a maximum ERI score based on Texas climate zones.
🔹 For detailed compliance guidance, visit our Compliance Pathways page.
📞 888-213-3975 – Local Energy Audits – Certified testing for blower doors, duct leakage, and energy efficiency compliance.
