Change from System and tank to Combi

DP · 2026-04-15T14:58:32+0100

ChrisJP said:
That assumes that the delayed HW is solely due to lack of water flow. With a combi boiler and HW on demand, the water flow is limited by the capacity of the boiler to heat it dynamically. Speed up the flow too much with a secondary pump and the HW will just be lukewarm.

Secondary pump on an unvented cylinder NOT a combi boiler
OP has a heat only boiler and cylinder.

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Change from System and tank to Combi

DP

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