Statewide Electricity and Demand Capacity Savings from the International Energy Conservation Code (IECC) Adoption for Single-Family Residences in Texas (2002-2011)

Abstract

This report is the continuation of the previous 2011 Statewide Electricity Savings report from code-compliant, single-family residences built between 2002 and 2009. Statewide electricity and electric demand savings achieved from the adoption of the different International Energy Conservation Code (IECC) versions for single-family residences in Texas and the corresponding construction cost increases over the ten-year period from 2002 through 2011 are presented in this report. Using the Energy Systems Laboratory's International Code Compliance Calculator (IC3) simulation program, the annual electricity savings in 2011 are estimated to be $151 million, and the demand reductions in 2011 are estimated to be 834 MW for the summer and 929 MW for the winter periods. Since 2002, the cumulative statewide electricity and electric demand savings over the ten year period from 2002 to 2011 are $2,199 million for the summer ($1,082 million from electricity savings and $1,118 million from demand savings) and $2,327 million for the winter periods ($1,082 million from electricity savings and $1,245 million from demand savings), while the total increased costs are estimated to be $724 million. Figure 1 and 2 show the annual statewide electricity savings and demand reductions. Figure 3 shows the cumulative statewide increased costs with the cumulative statewide electricity and demand savings from code-compliant, single-family residences built between 2002 and 2011.