The HEEALARX Combined water tank (boiler + buffer = all in one) provides an outlet water temperature of up to 70℃,serving as an additional option for use with radiator and underflodr heaing systems,as well as for domegtic hot water,meeting all household needs.it features a special desian with a combined DWH cyinderl (boiler) and buffer, made of stainless steel and triple-laver insultion, the boiler alsd has duble coil’ dual spirals with a surface area of 2.7m2, enabling additional heat exchange efficiency, embrace the modern solution of the combined terra Combined tank (boiler + buffer = all in one)and enjoy high performance while saving energy. There are two combinations for the buffer tank and storage tank, so it is flexible to choose different tanks according to the area of the house, heating needs, and water usage needs.