I tend to agree with you that antifreeze is antifreeze. It is only protecting the aluminum of the pipes and the stainless steel in the boiler and will work at temperatures lower than a cars system. From memory the shower boost system only increases the temperature from 55 to 70 deg C.
Got me wondering whether the boiler warranty is longer than 2 years or is it just one year. I know the caravan may have 6 years but that probably does not cover the equipment fitted such as the boiler and heating system
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XC60 2013 D5 215 SE Lux Nav geartronic
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