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Last seen: Oct 9, 2026
@chinkoa Sorry there are two separate thoughts going on which I didn't make clear: "What's the capacity of the heat pump. Flow...
Agree. I think I have given you several pointers to help track it down, its now up to you whether to pursue any or hope your installer will diagnose,...
@papahuhu sorry - confusing info in previous posts Anyway upstairs rads aren't getting to anything like the flow temp it seems so that needs to be f...
What's the capacity of the heat pump. Flow rate (l/s) x DT (say 5) x 4.2 = heat transferred in kW which needs to be greater than or equal to capacity...
I find it impossible to believe that your house heats by 0.7C, or even 0.2C, in 2 minutes, unless you live in a tent. IMHO something else is causing ...
That really, really shouldn't happen and suggests that the heat pump may be well oversized or there is some other problem eg a badly set up buffer/LLH...
Either complete Bow Locks or at best a marginal effect. The amount of energy it needs to produce is fixed by your house. If you force it to produce...
Are you saying that there is a loss of 8C from heat pump to rad. Thats a lot - why? If thats right then its not surprising rads are too small! &nb...
Air comes out of solution over time. I had to bleed one radiator every second day for a month after the installation was done and only the other day ...
I presume he didnt say why? I dont personally understand how this can be the case (so suspect BS) but of course willing to listen to arguments. &nb...
Well that puts a different light on it altogether! Radiators not getting warm would be due to one or more of (a) valve blocked - note that TRV pins...
@jaynieq I wish you luck with this one. I think the main thing I am telling you is to focus (when discussing with any plumber) on the water hammer an...
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