Buildings have large floor areas, with large number of lights and ventilation circuits, they are also widely spread out. They would benefit greatly from having a location for centralized control in order to simplify their management, reduce manpower and wasted energy, thusly increasing their overall value and quality of service.
The power supplied to the air conditioning, ventilation fans, exhaust fans, sprinklers, water fountains, can all be placed under the centralized control.
The LT3506 with its smaller rated relay may be used for sub area lighting since the amperage for each circuit is much smaller.