With more complex designs, stringent safety requirements and increasing energy concerns, designing or improving commercial buildings has become a critical engineering challenge. Comfort, safety and efficiency need to be guaranteed and able to stand up to intense scrutiny. Whatever the structure — office building, hotel, school, parking garage, mall, stadium, tunnel or concert hall — buildings must meet the rigorous aesthetic, social and environmental standards of the times.Offering a suite of powerful engineering simulation tools, ANSYS, Inc. empowers professionals to optimize building designs, especially in early stages when changes can be implemented efficiently and cost-effectively. Using these tools, architects and engineers can make informed decisions about the choice of building materials, system components and HVAC systems.