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Yeah I was expecting the COP to be higher, but looking at historical data it's always been like this.Thanks for suggesting Heat Geek, looks like there is one installer in Dublin, I'll reach out to them. They have a very good video explaining zoning and heat pumps...

COP for yesterday was 3.53 (around 10-12C outside temp), the day before 3.71 (outside temp 12-13C)

Correct, it's a pre-plumbed Joule system. However the UFH was fitted later on by a different installer than the heat pump. The zones roughly correspond to separate rooms, it's not an open plan. In terms of safety/efficiency the other concern I had was about flow temperatures. Since it's a...

They've actually fitted a TRV on the towel rail, that will need to go. On circuit 1 there's 2 towel rails without TRVs and a small rad in landing with no TRV either, so I think that should be fine. It is. The quote for commissioning the UFH didn't go into details like blending valves, extra...

it does. Assuming it's balanced correctly there should be no issues with the flow in UFH then?

Hi, we had UFH installed dowstairs in our house recently, and I'm not 100% sure that it's connected correctly. I'd be grateful if someone could have a look at the diagrams and tell me if what the plumber did makes sense. The house is heated with an A2W Samsung/Joule heatpump. The buffer...