Hi,
I've got a hot water tank (approx 4' high) and it's currently got a tiny immersion heater element (11" from what I can guess off the label and also the pitiful amount of water that a single heating produces).
I would like to replace it to enable it to heat the majority/entire tank. Is there any rule of thumb/limit on what length of heater you can use versus the size/height of the tank?
Andy