How and where are you measurung the flow?Current flow rate with an open vent system is 18 litres per min, as I'm converting to a combi system, what should I expect the flow rate be? the same, increase or decrease?
How and where are you measurung the flow?
Using figures quoted for the Vaillant 831.
Max output of 31KW gives deltaT of 35 degrees with a flow rate of 12.7 litres per minute
This was measured at the cold tap
The tap could still be restricting the flow, depending on the type of tap. If you have a garden tap, measure the flow there as it will be unretricted. You should also compare the flow when the kitchen tap is full on at the same time.At the kitchen tap
Your cold tap if it is in the kitchen will be direct from the incoming mains supply not from an open vent tank
Read the ops first postYou do state the obvious don't you.
You do state the obvious don't you.
Perhaps not obvious to the OP... Or many others reading these threads.
I've lost count of the number of customers whom I've asked to show me their boiler, only to be taken to the hot water cylinder... We then have to traipse back downstairs.
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