The effectiveness of introducing effective energy savings measures for households in Japan’s residential sector

A simulation model was developed for energy consumption in Japan’s residential sector. This model classifies households into 912 categories by household type, building type, and house insulation level. The total energy consumption in the Japanese residential sector was evaluated along with the effect of introducing various energy saving systems, including introducing new-generation water heaters such as heat pumps, cogeneration, and other systems. Except for photovoltaic generation, these systems are competitive. So most effective systems are selected in each household and the effect of these various systems was evaluated at a nationwide level.