For a simple summary of the prescriptive requirements under the 2015 IECC in Texas, print out a copy of the “IECC Compliance Guide for New Homes in Texas,” produced by the Responsible Energy Codes Alliance (RECA).
The National Fenestration Rating Council (NFRC) is a non-profit organization that establishes objective window, door, and skylight energy performance ratings to help you compare products and make informed purchase decisions.
Additional information on how to choose energy-efficient residential windows is available from the Efficient Windows Collaborative (EWC).
The Department of Energy (DOE) plays a role in developing model codes and standards, and establishing energy efficiency regulations for Federal buildings and manufactured housing. The DOE Building Energy Codes Program supports state and local code adoption and implementation and assists building industry stakeholders and enforcement officials with compliance.
SPEER promotes energy efficiency and state energy code compliance in the South-central US. They offer education, training, outreach and peer support to code officials, builders, and contractors. For more information on their resources visit their Energy Codes Program webpage.