Hardly a day goes by where we don't hear about the rising cost of energy, its scarcity and the impacts of using fossil fuels on the global environment. The media and the general public seem to focus primarily on vehicular and power plant energy consumption as our largest pollution concerns. On the other hand, data from the US Energy Information Administration[1] has revealed that the largest single energy consumer in the United States is in the building sector at 48% of the total national consumption - a staggering 48.17 Quadrillion Btu in the year 2000.