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Last seen: Sep 21, 2026
More expensive, larger, louder and won't modulate down so low and are thus less efficient for space heating if the house doesn't need it. If you real...
Yes, sorry for any confusion. 10C is sometimes quoted as the temp of incoming mains (being, I presume, roughly the temp underground at the level the ...
another is to fit waste water heat recovery
OK lets go with 6, 8 minute showers at 10l/min. So you need 480l of water at 40C. If you start of with 300l at 48C (a common setting) and mix it wit...
Any heating set up with either variable or low flow temperature does this. In the UK we normally set up boilers to run at a high fixed flow temperatu...
We need to do some energy calculations! Over what period do you need 8 showers and do you know the water flow rate even roughly. We need these numbe...
The ASHP, just like a boiler, can supply water at only one temperature at any time. So it switches between space heating and DHW. There will be one ...
@mars That could be a whole discussion in itself. I don't personally think its simple!
Unless you have a time of use tarriff/economy 7 then the most economical way to heat DHW is when its warmest outside, generally mid afternoon. Howeve...
It can do provided that doing so doesn't exceed the maximum possible output power. That's the basic limitation which it can't circumvent. Your 8.5kW...
In general terms most heat pumps have this kind of characteristic unless output is capped in the firmware to flatten the curve artificially. Do ...
at 8.5p per kWh its probably not worth spending too much time optimising for efficiency unless you want to enter into the top of the SCOPs competition...
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Degrees of Separation
Latest Posts
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RE: Starting Our Heat Pump Journey: 1962 build 3 bed detached house
Posted by: @ian-s Could always use the money saved o...
By Rob of York , 14 minutes ago
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RE: Why are ASHP installs so expensive?
And then you look at US electricity prices and weep.
By bornagain , 2 hours ago
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Depends on what controls the pump! Thats the whole poi...
By JamesPa , 7 hours ago
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The positive reviews keep coming in for Britain's Heat ...
By Mars , 21 hours ago
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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 , 1 day 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 , 2 days 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 , 2 days ago
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RE: Grant R290 DHW Cycle Interuption
It looks like some sort of short pre-run. The question...
By JamesPa , 2 days 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 , 2 days ago
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RE: Say hello and introduce yourself
@gz00, welcome to the forums. There’s a huge amount of ...
By Mars , 3 days ago
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RE: Home energy storage & battery register
1 fox ess lv5200 batteries, plus 2 more waiting to be i...
By Jimcub , 3 days ago
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RE: Heat Pump deployment statistics: June 2026
@l8again Unfortunately the government is, I suspect,...
By JamesPa , 3 days ago
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My feed of random industrial auctions turned up this au...
By Prunus , 3 days ago
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We’ve just passed 20 million forum views! 🎉
It's official. The Renewable Heating Hub forums have of...
By Mars , 4 days ago
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