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Last seen: Sep 20, 2026
Its good to hear that you are pleased with the outcome. I agree with @old_scientist that cycling is to be expected (and is unavoidable) in milder tem...
That needs investigation. Its currently mild so you can do things that you cant do when its cold. Turn the ASHP off completely for 3 hours (preferab...
The spec for your model calls for a total of 39l for 'cooler climates'. I think we are in the 'warmer climate' region according to the relevant EU di...
Im going to cut to the chase. From all you have said, my guess is that you have an 8.5kW pump in a 4-6kW house controlled by thermostats (I thi...
I presume the diverter valve then, which would make sense. As you say you would expect this to be on the inlet to the BT
Is it a 2 way valve or a 3 way diverter valve. Normally the (3 way) diverter valve is the only motorised valve needed. As you say taking some tempe...
@davidnolan22 I will continue to think about this. We could do with a comment from @bobtskutter on the pump arrangement , he is good on the hydron...
Fundamentally emitter output increases with flow temperature. Once the system has got to the point where flow temperature is such that the emitters a...
if 38 at -3 is specified as an end point on the curve, the target temp will never go above 38. If however you shut zones down then it may overshoot b...
OK nothing obvious here so more questions Im afraid What controls the pumps Are you sure that the secondary remains open (and pumped) during d...
I got several quotes like this for a (on the face of it) similar season. I also got two quotes of 5K + BUS grant, from the installers I anyway trust...
OK Its a complex system (5 pumps!), how is it controlled: eg weather compensation only without room influence, zone valves?, TRVs?, external thermo...
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Latest Posts
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RE: Next steps on my ASHP journey: Radiators and Pipework
I have one of these fitted which also allows you to reg...
By Old_Scientist , 8 minutes ago
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RE: Recommendations in Ely (Cambs) area for Full setup checks on Nibe HP setup for House.
If they can't don't give up. Heat pumps are, in reali...
By JamesPa , 1 day ago
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RE: Starting Our Heat Pump Journey: 1962 build 3 bed detached house
@ian-s I wouldn't be too concerned about the design ...
By Rob of York , 1 day ago
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RE: Missing flow temperature in Heat Geek proposal
Yes that's what would happen by turning down the lsv to...
By JamesPa , 1 day ago
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RE: Grant R290 DHW Cycle Interuption
It looks like some sort of short pre-run. The question...
By JamesPa , 1 day ago
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RE: Cascade System or larger single unit
@renewables345 I would say if it a new build it’s no mo...
By Aventus Eco , 1 day ago
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RE: Why are ASHP installs so expensive?
Posted by: @batpred There´s another aspect that coul...
By Rob of York , 1 day ago
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RE: Say hello and introduce yourself
@gz00, welcome to the forums. There’s a huge amount of ...
By Mars , 2 days ago
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RE: Home energy storage & battery register
1 fox ess lv5200 batteries, plus 2 more waiting to be i...
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RE: Heat Pump deployment statistics: June 2026
@l8again Unfortunately the government is, I suspect,...
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My feed of random industrial auctions turned up this au...
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Thank you @majordennisbloodnok – that means a lot, part...
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We’ve just passed 20 million forum views! 🎉
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RE: Who's your electricity provider and what's your tariff?
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