15 September 2011


The potential CO2 reduction from heat pump systems in Japan is estimated to be about 140 million tons. Heat pump technology has been attracting attention as a measure to mitigate global warming because of significant CO2 reduction effects. This report described the history of improvements in heat pump efficiency, the spread and estimated future CO2 reduction potential, and the possibility of contributing to economic growth. This report also introduced support systems, such as tax incentives and subsidies, and definitions of renewable energies in relation to the trend in the heat pump policy of the Japanese government. In addition, the report estimated the amount of air heat used for residential room heating, residential water heating, and water heating for commercial uses to show that the use of renewable heat can be expanded through the spread of heat pump systems.