This is the question posed by Dr. David Johnston, from Leeds Beckett University, and architect Mark Siddall, from LEAP. More particularly they have examined the performance of the building fabric. Studies have shown that regular homes in the UK can use up to 100% more energy than their designers say they will. This has nothing to do with how people live in a house, and everything to do with how they are designed and constructed.
This new research paper presents the latest understanding of Passivhaus performance. If you are skeptical about whether Passivhaus buildings perform, or doubtful that the fabric building performance gap can be closed, then download the paper now by going to www.BuildingPerformanceEvaluation.co.uk