Heron gold is the most trusted model of Heron brand. Because this model comports in all region in Bangladesh. This machine even works where TDS level is high. This model has a variation of stages. You can purchase six stage and also can purchase seven stages. It has an auto flush system which takes back wash when it needs. It raises the longevity of RO membrane. It is a 75GPD water purifier which will provide maximum 288 liters pure water per day. It has a 12 liters metal reservoir which will reserve pure water. It has an Infrared RO technology which will reduce your muscle pain as well as fat. So, drink pure stay healthy.