Heat load factors in a cold storage design Heat load factors normally considered in a cold storage design are wall, floor and ceiling heat gains due to conduction, wall and ceiling heat gains from solar radiation, load due to ingression of air by frequent door openings and during fresh air charge, product load from incoming goods, heat of respiration from stored product, heat from workers working in the room, cooler fan load, light load, aging of equipment, and miscellaneous loads, if any