Mitsubishi Heavy Industries announced that it developed a heat pump type industrial-use water heater that allows for stable operation in the cold area. It can boil water up to 90 degrees centigrade even if the external air is 25 degrees centigrade below zero by increasing the number of pressures. The pressure raises temperature by compressing the air. Heat pump raises temperature by pressuring gas that intakes the heat of air. The thermal energy obtained from power necessary for pressure is of great help to energy saving. According to Mitsubishi Heavy, existing models decrease the pressure efficiency if the temperature is below 10 degrees centigrade below zero. Mitsubishi’s new model employs two pressures instead of one pressure carried by the existing models. The company developed the technology to maintain the pressure efficiency by interlocking the two pressures. The company will sell this new model to commercial facilities and hospitals in the cold area. The new model will be put on the market coming June for 5,800,000 yen a unit. The company plans to ship 500 units and get achieve sales of two billion yen in 2011. Mitsubishi will introduce small type for household and increase sales in the heat pump business to 10 billion yen toward 2013.