Mcquay Duct Sizer is a software tool used by HVAC engineers to design and size duct systems for commercial and industrial buildings. This tool helps in optimizing the balance between system performance and energy efficiency, as well as reducing installation and operating costs. It is a user-friendly program that allows engineers to input project data such as the type of building, occupancy, and ventilation requirements. The software then generates a detailed duct layout, including sizing, pressure losses, and fan power requirements. The Mcquay Duct Sizer also incorporates a library of duct materials, fitting types, and equipment selection options, making it a comprehensive tool for HVAC system design.