Model: JPC 1) Use the copper coil as the heat exchanger, according with international fashion trend,it is simple to install and use. 2) It takes the advantage of the tap water's pressure. more pressure, more comfortable. 3) It can produce hot water with constant temperature, it is safe and comfortable to use. 4) The water can be heated rapidly, so it can produce the high quality hot water. 5) It can produce more hot water than the general types because it isn't. JINYI solar offers a range of high quality tanks designed especially for "Pre-heating". These tanks can be used in combination with existing electric/gas mains pressure water heaters, or even as stand alone low pressure hot water systems with the addition of electric elements or external gas boosting. Ideal for use as low pressure thermal stores, the JINYI pre-heating solar hot water heater is available with the addition internal coil heat exchanger.