The Iowa Nest Residence is featured on the SketchUp Blog as a case study in Net Zero Energy design. The article includes key lessons that were learned during design, including the importance of the overall shape of the home on performance and cost, and the importance of looking at passive measures and HVAC system holistically.
You can read the article here: https://blog.sketchup.com/article/tips-for-designing-a-net-zero-energy-home
Thanks to Sumele Aruofor and the SketchUp team for the great write-up!