Is it a something like a sphere, which everybody familiar with thermodynamics knows is the most efficient shape?
Is it a shiny futuristic glass cube, which is usually much more functional ?
Is it a house stuffed with all sorts of techno-gadgets?
Or, it is a some sort of combination? May be, but not necessarily. One has to look at the performance house as a system, which it undoubtedly is. Then one must recognize that it - as any system - consists from many smaller systems (structure, insulation, ventilation, heating and cooling, water supply, electrical etc) constituting the whole, and in turn is a part of a bigger urban system, community, natural environment etc. Then it will be obvious that performance home to be built in Sun Peaks Resort on elevation of 2,400 m would be totally different from the one to be built in Saudi Arabia.