I'm hoping someone give me some advice. I have a 10 year old British Gas 330 condensing boiler and a hot water cylinder in the airing cupboard which has a thermostat setting on the side. I'm always struggling trying to get a balance between hot water that is more than lukewarm and radiators that don't take your skin off it you touch them. I've searched high and low and all the info I find seems to suggest the boiler temp should be set at around 75c for the radiators and 60c-65c on the cylinder thermostat. Does that sound right? Trouble is with those settings for me is, the hot water isn't quite hot enough and the radiators get too hot. It's almost as if I need the boiler temp (for the radiators) to be set lower than the temperature of the hot water cylinder, but how would that work? I don't think there is anything 'wrong' with either the boiler or cylinder, my CH system is serviced once a year. It's more that I'm having trouble deciding on the optimum temp settings for my home.