Am thinking about replacing our Ferroli 77FF at some point in the near future. It's just about hanging in for the moment with an annoying DHW issue that I now suspect may be the exchanger (have replaced thermistors, will only properly heat hot water by reducing flow with tap). It has only adequate performance but am questioning whether it's worth risking the cost of an exchanger given it's sixteen year service life. Plus I'm just completing the conversion of a former outside toilet into a wet room, so there is going to be the potential for an increased demand on the DHW supply.
Quite like the spec of Vaillant 837 / WB Greenstar / Ferroli some of which have DHW flow rates ~15l/min, about 5l/min more than ours would be if its DHW circuit was working correctly.
To what extent are these flow rates dependent on incoming cold water pressure though?
Quite like the spec of Vaillant 837 / WB Greenstar / Ferroli some of which have DHW flow rates ~15l/min, about 5l/min more than ours would be if its DHW circuit was working correctly.
To what extent are these flow rates dependent on incoming cold water pressure though?