Is the case hypothetical, or do such buildings already exist in an environment where the elements are just as harsh as they are in the region of Fort McMurray? They may exist in Europe, but in the Far North, it will be more difficult to comply with standards and generate an amount of energy equal to what is consumed. You talked about seasonal peaks and temperature differences; I suppose these factors would make meeting the objective more complex.
On September 29th, 2009. See this statement in context.