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    Sizing boiler output pipes v cycling v pump speed

    I'm trying to figure out how to make my system work better and if it has been installed properly - boiler tends to switch off before rads are really hot (system is clean)). What's the max BTU (or Kw) you can stuff through 22mm flow and return pipes before the boiler starts cycling due to not...
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    Should I give up on my cast iron boiler?

    Getting big quotes to fit a new £600 boiler in place of my archaic Ideal Standard cast iron floor mounted boiler that I can not afford. Could I look to getting the old fella fixed? (igniting pilot circuit doesnt work, cracked leaky sight glass, sooty smelly flue...) and seeing if I can get...
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