DOE/PNNL Prototype Building Models (commercial ASHRAE 90.1 and IECC, residential IECC, manufactured housing) Source: U.S. Department of Energy Building Energy Codes Program, https://www.energycodes.gov/prototype-building-models Models: developed by Pacific Northwest National Laboratory (PNNL) for DOE; the IDF headers cite "DOE and PNNL". The archives carry no separate licence statement. energycodes.gov is a DOE website whose footer links the energy.gov Web Policies (https://www.energy.gov/web-policies), which treat government information on DOE websites as public domain, excluding third-party material, and ask that DOE be acknowledged. The atlas therefore records these files as U.S. government work in the public domain with attribution requested, and credits the U.S. Department of Energy and PNNL wherever values derived from them are used.