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Last seen: Sep 21, 2026
@rob-of-york — thanks again for a clear helpful explanation. If I can summarise, I think the key point is that the heat from other sources stays prett...
I get the general principle. My contention is that you need to sample often enough to get true average, since infrequent sampling may miss observation...
@rob-of-york — thanks again for posting in such such comprehensive and comprehensible detail, you are a great asset to the forum! I think the pro...
I suspect most if not all of the tank level measuring systems available will have been developed to tell the owner when they need to fill up their tan...
It's an enticing idea, but the problem is knowing the oil usage over the reference period to sufficient accuracy. All I had was a sight gauge on the s...
@ian33a — I'm not so sure about the numbers in the last spreadsheet excerpt you posted. If your average daily oil use is 6.58L, and if an average heat...
@jamespa — I can't argue with any of that. I also take the important point that what you need to know in practical terms for heat pump sizing is not w...
But that is using a range (6.6 to 10 kW) to rule out the 14-16 kW jokers! I've said I agree the method can be and often is useful as a sense/sanity ch...
But there is a whiff of whatiffery: (a) what if 'the number of degree days is fairly consistent from year to year'. But what if it is not? This can ...
That is indeed the take away message in my view. It would be very useful if we could find a way to use oil consumption to derive heat loss, but I thin...
When you say 'scientifically derived', does this mean from first principles (as you imply, using degree days, and if so what is the actual derivation,...
It is always a good idea to quote sources, some might say it is essential. This time Wattson did get the answer, and it turns out that it is our very ...
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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 The bigger item think is do we upgr...
By Rob of York , 22 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 , 47 minutes ago
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Depends on what controls the pump! Thats the whole poi...
By JamesPa , 6 hours ago
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The positive reviews keep coming in for Britain's Heat ...
By Mars , 20 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 , 24 hours 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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