The concept of burying ducts is not new, but the prescriptive requirements in the 2018 IECC are. This webinar, which is part of DOE's Building Energy Codes Program Energy Codes Commentator webinar-based training series, provided a brief look at the research behind buried ducts, the prescriptive code language in the 2018 IECC, practical information on how builders can use the practice today (even if their jurisdiction doesn’t yet have the 2018 IECC), and an overview of the energy and cost benefits of the approach compared to traditional or unvented attics.