Cooler design is calculated by determining the required cooling capacity of the system. This is done by calculating the total heat load of the space, which is the sum of the sensible and latent heat loads. The sensible heat load is determined by the size of the space, the number of occupants, and the amount of equipment in the space. The latent heat load is determined by the amount of moisture in the air. Once the total heat load is calculated, the required cooling capacity can be determined by multiplying the total heat load by the desired temperature difference. The required cooling capacity is then used to determine the size of the cooler needed for the space.