What is Dual-Fuel?The Main image shows a radiator being powered by “dual fuel” via a standard electric heating element and a central heating system.
The product comes empty and simply fills from the central heating system – your electrician simply inserts the heating element into the desired radiator leg via the t-piece and the element is then hard wired in, the process is exactly the same for a thermostatic element
Then your plumber fits the connecting flow pipe to the radiator also via the t-piece shown below and valve.