Zema Systems, Inc.’s (Tempe, AZ) System Energy Analysis tools are programs that are built to accurately predict the energy use and cost for a given building. They take into consideration variables such as: type of construction for a given structure, orientation, width/height, glass area, roof/wall type and insulation, lighting, occupant load, process load, and outside air requirements, and then allow the engineer to apply each of the mechanical equipment strategies according to the building’s energy model created from the analysis.