Flow and return temperatures

Discussion in 'Engineers' Talk' started by Baxi Boy, Nov 27, 2018.

  1. Baxi Boy

    Baxi Boy Member

    Can a heating engineer tell me if a flow temperature of 7degrees higher than return at combi boiler is about right in a small house? And the radiators also have a 6 or 7 degree difference,ie 60degrees flow side and 54degrees on return.
  2. KIAB

    KIAB Well-Known Member

    KUsuall differential is 11 degrees C (approx 20 degrees F).
  3. Baxi Boy

    Baxi Boy Member

    Yes,thanks for your reply I have read that 11 degrees is the usual,but with a small house with 6 small radiators,is it likely to be less,as I have 6 or 7 degrees?

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