

The residential analyses are customized based on current state energy codes.

These analyses take into account varying state-level conditions, such as incremental costs, utility rates, climatic conditions and construction trends. Pacific Northwest National Laboratory (PNNL) assesses recent editions of the model codes to quantify the associated energy & cost savings. HERS Index Values Corresponding to the IECC.National Cost Effectiveness of the 2018 IECC.National Cost Effectiveness of the 2021 IECC.Energy and Energy Cost Savings Analysis of the 2018 IECC for Commercial Buildings.National Cost Effectiveness of Standard 90.1-2016 Workbook.National Cost Effectiveness of Standard 90.1-2016.

