What is design condition in HVAC?

Design condition in HVAC is the set of conditions that the system is designed to operate under. This includes the temperature, humidity, and air pressure of the space, as well as the type of equipment used. Design conditions are used to ensure that the system is able to meet the desired comfort levels and energy efficiency goals. Design conditions are also used to determine the size and capacity of the system, as well as the type of components and materials used.