Influence of behavior change to prevent the expansion of COVID-19 on energy consumption of all-electric apartment houses in Tokyo

The authors analyzed the impact of the behavior change to prevent COVID-19 expansion in 2020, targeting all-electric apartments in Tokyo. Compared to 2019, the electricity consumption except for hot water use in April and May increased by about 30% and the water consumption increased by about 10%. Especially on weekday daytime consumption, electricity and water increased by about 50%. If there will be a requirement to take infection prevention measures in the cooling and heating periods, it is expected that the energy consumption will increase significantly more than before.