Continued . . .

Do I simply run wires of the correct thicknetss from the upper area, i.e. underneath the boiler, to the planter and the backing foil (4 layers), do they have to be straight, i.e. near horizontal, or can they be a little curved? Some people do this differently you see. Apparently some can make it work using horizontal wiring with their doth plugged into ports, while others have great difficulty getting it to work even with the wiring going at a steep downward angle. One assumes that the two inlet pipes (*the gas one of which going the length of the flat has a 240v mains electric cable on top of it in regular insulation sleeve), being hardpiped by a professional plumber and gas engineer, will serve well as the upward push that is required.