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Last seen: Aug 31, 2026
@tasos — thanks for confirming you have a R290 unit. I'm pretty sure most if not all R32 units would be cycling in the condition on your chart. Also, ...
@jamespa — thanks, that is what I vaguely remembered, much clearer now.
@mk4 — all very interesting, especially the water pump stuff and the absence of cycling. I may be wrong, but I think 'almost everybody else's' mea...
That is a very abnormal period, almost all defrosts (LWT below RWT) and two steady state runs (both afternoons, second one also has a DHW reheat). It ...
Monty Python may have asked 'what have the Romans ever done for us?' but I agree, the Roman achievements are impressive but I suggest they got there e...
@bash — another thing to be aware of is that inadvertently over-doing the lock shield tightening can reach the point where the system becomes constric...
The years between oil use and the heat pump (roughly 2019 to 2021) when I used standard mains electricity to heat only the room(s) I was in were like ...
@jamespa — one of the big problems with historical oil consumption is you probably only have scrappy records (if that) of past oil deliveries that may...
@woofers64 — I do agree the top two definitions and their distinction could be clarified and that is why I said I am sure @editor will attend to it.
I think that is an excellent suggestion, I am sure @editor will attend to it. To be clear. I see flaw-less as fault-less, and a fault or defect is s...
I'm with @editor on this one. Flawless as the top category is fine. It does not mean perfect, it means flaw-less, no flaws. A flaw is a fault of a def...
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Latest Posts
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RE: Problems with sizing a replacement for a Viessmann Vitocal 200-S
Thanks for sharing that. Your objective seems very sen...
By JamesPa , 7 hours ago
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RE: Solar Power Output – Let’s Compare Generation Figures
@toodles Very nice. Ours was the opposite, about 10%...
By Papahuhu , 8 hours ago
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RE: Adding additional Solar Panels to a DC coupled battery system
A couple more points about placing solar panels at low ...
By Transparent , 9 hours ago
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RE: How Accurate Is My DIY Heat Loss Calculation?
@kilgorexv definitely a larger inverter will help and m...
By AndrewJ , 1 day ago
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RE: Adventures in heat loss calculations
@rob-of-york — thanks for posting this, all very useful...
By cathodeRay , 2 days ago
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RE: Surface mount or bury primaries for heat pump installation?
The installation is almost done! I've written up two ...
By tomasmcguinness , 2 days ago
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RE: Glass lined Cylinder for private water supply
This has turned into a fascinating little rabbit hole. ...
By Mars , 2 days ago
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RE: Switch suitable to change between two inverter CT's
Last winter my battery ,32KWh, could run the house com...
By Jancold , 2 days ago
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RE: HeatGeek vs Octopus surveys: puzzling disparity - any ideas why?
Agree with Major. And even if I was very happy with ...
By Batpred , 2 days ago
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RE: Is the "divide by 2900" rule still valid?
There is another estimator that you could use, a formul...
By Rob of York , 3 days ago
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RE: To re-pipe or not to re-pipe? Moving from oil boiler to air source heat pump.
@penval, really useful update. After all the discussion...
By Mars , 5 days ago
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RE: Who's your electricity provider and what's your tariff?
@papahuhu I prefer to look at it simplistically. We d...
By Old_Scientist , 6 days ago
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RE: Questions about A2A for heating as well as cooling
@rob-of-york I would concur with the underfloor insulat...
By Toodles , 6 days ago
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RE: New Vaillant Arotherm controls link to existing thermostats ; wired vs wireless
Nothing attached! I have rads but UFH makes the case ...
By JamesPa , 6 days ago



