As a follow-on to The Great Passivhaus Face-off, take a look at this commentary from a couple years ago in the wake of a visit to Passivhaus examples in Germany by a couple well-informed British authors and researchers — The Passive House: thoughts and reflections. It begins, "There were a couple of moments when the PassivHaus study tour seemed to lose all contact with normality and enter into a surrealist daydream..."