The U.S. Department of Energy has made available a State Savings Calculator that assesses the cost-effectiveness of updated editions of energy codes broken down by state.
DOE assesses the savings associated with updated editions of ANSI/ASHRAE/IES Standard 90.1: Energy Standard for Buildings Except Low-Rise Residential buildings and 2015 IECC for Commercial Buildings. DOE data includes both national and custom state-level analyses.
The State Savings Calculator provides a means of tailoring state-level cost-effectiveness analysis. This interactive tool mimics the overall DOE methodology, but allows for customized economic assumptions and other parameters that may vary on a state-by-state basis.
These include parameters such as local cost adjustments, energy prices and escalation rates, inflation and taxes, loan terms, and the overall study period used for the analysis.