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Last seen: Sep 21, 2026
Most radiator manufacturers give a curve for output in the form P=kdeltaT^n where k is a constant, deltaT is the temp difference between radiator an...
@iantelescope Thanks for the replies. No conclusion can be drawn from the energy graph without also showing oat and it. Suggest to ignore for no...
It looks like B1, B2, Hall, Kitchen are bigger than needed for the design flow temperature so will work at lower FT. Living room*2 are smaller than n...
@iantelescope In summary this all looks good so far. I can offer the following initial observations on the graphs These are showing a sm...
Good, the graphs will take some looking at to see if there any insights. @derek-m may beat me to it. If it looks like room temperature is genuine...
There is some possibility for confusion here. If its the design schedule from the system designer then 'at a design temperature of 50' is likely to...
Unfortunately I think this goes beyond heating engineers, its a facet of practical trades in our country - we value celebrity and financial engineeri...
@editor Precisely so. We need an industry that has the capacity and delivers a quality product at a reasonable price. DiY-ers complement the i...
@johnmo @heacol @derek-m Perhaps it would help to distinguish expertise from experience. Expertise is valuable in most circumstances. Experience i...
@iantelescope Good. Why are you expecting the house to cool significantly? If I understand your system correctly your secondary (radiator) p...
PS. I should have added that the heat pump capacity you need may be up to 25% less if you have a very old (ie inefficient) boiler. In the range 6-9k...
On the basis that oil is 10kWh per litre, 1800 litres is about 18MWh. That very roughly translates to a 7-9kW heat pump. You will need to have a pro...
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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 , 8 hours ago
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RE: Why are ASHP installs so expensive?
And then you look at US electricity prices and weep.
By bornagain , 10 hours ago
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Depends on what controls the pump! Thats the whole poi...
By JamesPa , 15 hours ago
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The positive reviews keep coming in for Britain's Heat ...
By Mars , 1 day 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 , 3 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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