The Japan Refrigeration and Air Conditioning Industry Association (JRAIA) and the Heat Pump and Thermal Storage Technology Center of Japan (HPTCJ) have been promoting the use of residential Eco Cute heat pump water heaters using a natural refrigerant CO2. As of the end of March 2016, cumulative shipments of these systems exceeded the 5 million level, reaching 5 041 000 units.
By incorporating an air-source heat pump, Eco Cute systems enable a substantial reduction in energy consumption to be achieved in the water heater segment, which accounts for one-third of household energy consumption. Since 2001, when the Eco Cute was commercialized for the first time in the world, products with various features have been placed on the market in order to meet users’ needs, for example, a model with multiple functions including floor heating, a space-saving model, etc. As a result, cumulative shipments of Eco Cute systems since the technology was initially introduced surpassed 2 million units in October 2009, 3 million in August 2011, and 4 million in October 2013. As the figures show, Eco Cute water heaters have steadily penetrated the market, and at the end of March 2016, cumulative shipments exceeded 5 million units.
Source: JARN, June 25, 2016