Accurate load calculations are critical for data center HVAC system design. Primary considerations include the heat gain from IT equipment, lighting, and people, as well as the heat rejection requirements of the cooling system. It’s essential to account for the high density of heat-generating equipment, such as servers and storage units, and to consider the potential for future expansion or changes in equipment layout. Additionally, load calculations should take into account the specific cooling requirements of different zones within the data center, such as cold aisles and hot aisles.