heat loss/leak radiator

[royal]

A couple of months back I had a new backboiler fitted to my old rayburn (oil conversion) at the same time I had a new hot water cylinder fitted as the old one was the dated unlagged type, the problem I have now is that my system is over efficient, at present I turn the rayburn off each night and relight it each morning and that still produces more hot water than we can use (we can draw off a bath full of very hot water every 4 hours) if I leave the rayburn on overnight the system rumbles and vents itself constantly to the point it becomes worrying! but come the cold weather I need to keep the rayburn lit 24 hous each day as we use it for cooking and it heats the kitchen, thats the background so here's the question, can I fit a heat loss radiator in the bathroom? if so what size in BTUs should it be and if I still have the problem could I fit a second one elsewhere upstairs, (and yes the rayburn is running on it's lowest setting) any help would be welcome

[TheDoctor4]

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