jim8flog
Journeyman Pro
Well, all I can say is that the towel rail gets hot all the way to the top, so I don't think it needs bleeding.
I did use a calculator and came up with about 1100 BTU for the room, but I have no idea what rating the towel rail has.
This bathroom is on the corner of the house, so two external walls. (We do have cavity wall insulation).
And it has an unusally large (115cm square) double glazed window, which could be losing a fair amount of heat.
Or perhaps we're just soft southern wimps and feel the cold
the BTU will depend on the design of the rad but a quick online search suggests somewhere around 1150 BTU.
Is it connected to the heating or the hot water system if the latter it may not be staying on long enough. Does it have a thermostatic valve and have you tried turning it to the max. Do you have good insulation above the bathroom (6"plus).
The calculator should take in to account window size.