NYC Energy Codes Pilot Study (IMAGE) DOE/Pacific Northwest National Laboratory Caption Energy codes are a subset of building codes, which establish minimum requirements and govern building construction. Energy codes encompass requirements for the energy performance of a building, including its systems and related components. Credit Composite image by Cortland Johnson | Pacific Northwest National Laboratory Usage Restrictions None License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.