Much of this can be made moot if the source of generation is from a renewable source. Not to say that efficiency is not critical since the demand will determine the amount of investment and measure cost effectiveness.

The point of incorporating efficiency is to minimize the pollution that wasted energy produces. The corollary is that for every home that is not using solar power is producing millions of cubic feet of natural gas that can be avoided.

We need to move beyond the fringes and address the source. Go solar.