Due increasing demands for energy saving, and replacing natural gas, R290 inverter heat pump become popular and big demands lately.   OSB heat pump factory own a professional technical team to innovate the R290 full DC inverter EVI heat pump. Find below selling points of this series:   * Full DC inverter technology, super low running noise. * Max hot water temperature reach 75 degrees. * Work well at -25~+43c ambient temp, suitable for chilly area or hot area. * Consider highly flammable of R290 gas, we pay attention to all the components use. Such like explosion-proof and certification fan motor, relay. * Electrical heater for backup water heating. * Use high efficient tube in shell heat exchange, good performance of water heating. * WIFI remote control function available. * Green gas R290.   See below full technical data. If need more info, please feel free to contact us.