boiler sizing for hot water

  1. L

    Sizing a boiler, any point in going bigger on a combi?

    I have measured my cold tap which has a flow rate of 11.8 litres a minute. The Baxi I am looking at comes with 12.2 Maximum DHW flow rate (Delta T @ 35'C rise) or 15 if I go for the bigger boiler. Is there any advantage in going for the higher capacity boiler as I assume it is not working...
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