In Japan, except for the part of the cold regions, it is common for the air-conditioning to be used only in the room where residents are there. Thus, large temperature difference is likely to occur between the rooms. The temperature difference has been pointed out as one of the causes of the heat shock. It is effective to use the 24-hours central air-conditioning system in order to eliminate the temperature difference. Therefore, in this paper, we analyze electricity rate and power consumption of 24-hours central air-conditioning system in warm region on the basis of long-term measurement for a detached house.
