This full day, three-part live course reviews Building Science principles as they relate to the Performance Path option in the International Energy Conservation Code (IECC). This course will introduce RESNET and the HERS Index, and relate the principles of building science as they apply to HERS. Explore the ERI/HERS Index as a tool to successfully design and build houses that meet code using the ERI/Performance Path to compliance, while also meeting the minimum prescriptive requirements of the current IECC enforced and/or adopted in the region. Participants will learn about the strategies and tools used by HERS Raters to perform analysis of a house to produce a HERS Index Score. The last part of the session will be spent reviewing energy rating software that is most often used by HERS professionals, and manipulating various construction assemblies to see the effect of HERS Index scores.