This video features The Passive House Academy’s Tomas O’Leary explaining some features from his own house in Ireland. I had the benefit of attending Tomas’ training course in the winter of 2013 and credit this course with my success in passing the Passive House Certification Exam. The video provides a basic introduction to some key aspects of PH design. I love that Tomas designed a floor-to-ceiling window wall that actually admits more energy than it looses over the course of a year. He also does a quick job explaining the basics of a mechanically ventilated home.