I find it hard to believe that the adoption of these energy codes  are  even at issue.  Those of us in the building industry  know that practices such as those identified in the 2012 code changes will significantly reduce the energy useage and improve home comfort of residential buildings. We are a not for profit home builder that builds for the less fortunate.  My major charge is to build a simple affordable home who's cost of ownership, read as energy useage, is the absolute minimmum I can produce. I have been building homes for Habitat using most of these practices for the past 10 years and am totally committed to continue these practices even if the code does not call for it. Homeowners of the homes we build with these practices report significantly lower utility costs than similiar homes not built under the   same  practices.  We know energy costs will increase in the future, we must get ahead of the curve and not play catchup with building practices we know work now. As a not for profit builder ,I am very concerned about keeping my costs of construction to an absolute minimum,and I know full well that some of these practices cost more, but we are   committed to keeping our homeowners cost of ownership to the absolute minimum we can afford to build, and  we can certainly afford to build to these practices and even more stringent practices..