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aj70, what sort and power is your boiler? Oilman - hotwater flow rate is 10l/min, hot and cold pressures approx equal. At 10l/min, water temp is raised from 8 degC to 34 degC At 3l/min, water temp is raised from 8 degC to 49 degC Thanks for your help! anne

Hello, The boiler is about 5 years old I think but I think our water is fairly soft- we don't get furry kettles or scummy tea. We're on the wirral. We have had someone to look at the boiler but he said it was working fine. He didn't service it, however. We're not sure it heats water up...

Hello, We've inherited an olde style one lever thermostatic shower in our house which has a knightsbridge 24kw combi boiler. Our shower does not get very warm, and you only get hot water out of the taps at a low flow rate. We were told by a boiler man that our boiler isn't up to the job...