HVAC design criteria are the guidelines used to determine the size, type, and placement of HVAC equipment. The criteria should consider the building’s size, layout, occupancy, and climate. The design should also take into account the building’s energy efficiency goals, budget, and maintenance requirements. The criteria should also include the selection of the appropriate HVAC system components, such as air handlers, ductwork, and controls. Additionally, the design should consider the safety and comfort of the occupants, as well as the indoor air quality. Finally, the design should be compliant with all applicable codes and regulations.