Convention 2.10 - Electric showers in rooms with another source of DHW

Where an electric shower is present and there is another DHW source (other than instantaneous electricwhich would be treated as the same system) this should be entered as a bivalent system. The other DHWsource should be treated as suppling 25% of the demand if it is supplying a hand wash basin only or 50% ofthe demand if there is also a bath present.