Power efficiency guide is DIY for free energy generator. Passive suitability , which is described as the ability of a facility to provide shelter and basic occupant needs during and after disaster events without electric power is becoming a design strategy to consider, particularly in areas of the country where storms and floods have been reoccurring annually or more often. Incorporate facility suitability concepts in the design of critical facilities, including on-site renewable energy sources that will be available to power the building soon after a major storm passes. The authors address problems that industry now faces, including the limited availability of conventional energy resources such as oil, natural gas, and coal, and considers renewable energies such as wind power, solar energy, and biomass. They also illustrate the economics of energy efficiency, discuss the financial energy policies of various countries, consider the role of energy conservation in energy strategies, a