Heatrae Sadia Megaflo HE Lower Immersion Heater Element is used to increase the water temperature within a cylinder. This water can then be used by the end user for radiators and domestic use. The element also enables the cylinder to hold its temperature, meaning the hot water will hold at the set temperature until it is given further instructions by the user. It is compatible with Electromax 180Ltr 6KW, Electromax 180Ltr 9KW, Electromax U/F 180Ltr 6KW, Electromax 6kW 180L radiator ErP electric flow boiler, Megaflo CL125HE, Megaflo CL210HE, Megaflo CL250HE, Megaflo DD300HE, Megaflo DDD210HE, Megaflo Systemfit CL125HE, Megaflo Systemfit CL170HE and Megaflo Systemfit unvented heating elements.