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I have an old boiler (at least 17 years), an Ideal Mexico Super CF75. Does anybody know if it's likely to have an aluminium heat exchanger? Not sure how long they've been making them of aluminium? The boiler is built like a tank (so to speak) so I was hoping the exchanger might be cast iron or...

We've just had some work done on the house and we now have a water softener and soft water in the central heating system. I'm going to add Sentinel X100 to the system as this specifically says it will work with soft water. I'm considering adding Sentinel X200 (boiler noise reduction by...