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A Heatrae Sadia upper straight immersion heater is an electric water heater that sits inside a hot-water cylinder. It acts a bit like a kettle, using an electric resistance heater to heat the surrounding water. They are connected to their own power supply via a cable. They can be easily switched on and off via an external programmer, as there is no need to constantly heat the water in the unvented cylinder.
  • Immersion heater
  • Designed for Heatrae Saida cylinders

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