Peak Demand Limitation It is proposed that the building energy management system performs Peak Demand energy limitations. Peak Energy Demand on commercial buildings occurs on the warmest days of the summer and only for a few hours. During this Peak demand period the energy grids are at their limits. When these limits are encountered or exceeded most generating power plants are forced to bring on line auxiliary fossil fuel generators to meet the demand of the power grid. Further continued overloads usually dictate the need for additional power stations. The Navy League project is seeking to use the advanced energy and building management system to limit the peak energy demand draw from the structure by measuring energy consumption provide real time deferrals of energy usage. The basic strategy will be to set up a control matrix of temperature set points that at the peak demand periods will be allowed to float over a broader range. The space temperatures will be allowed to rise within the upper range of Ashrae comfort zone to reduce main energy inputs from chillers and pumping systems. This short duration will not effect the overall ventilation system which will continue to be fully effective and will not require additional raw materials needed for other types of mechanical systems that can defer peak demand usage.