What to do next...improving the system

[Timbones (Tim)]

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Circulation pump sizing

So after a longish journey as documented in this post What to do next...improving the system - #13 by deano (basically primary runs now in 22mm copper and buffer (100L) turned in to a volumiser) So on the ASHP side of the buffer was a UPM3L 15-75 130 and on the house side was a UPS3 15-50/60 130, this gave a flow rate of 870 litres/hour. No idea what the house side was doing, but was a fixed speed. Since changing the buffer into a volumiser flow rate has dropped to 650 litres/hour, which woul…