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Last seen: Jan 28, 2026
I believe this is in reference to what they originally designed which was as an example: A Stelrad Concord Lo-line 296x1600 v A Eskimo 200x1694 ...
Thanks Toodles, this is the ongoing back and forth unfortunately with the builder, plumber and now heat specialist. According to the builder the heat...
Hi both, the rads heat when the ASHP runs, I don't believe there's any issue there, this was something the heat specialist checked (bled, check TRVs o...
Well I'm now currently stuck in a who's liable for installing the buffer tank for this install / myself querying is this 100% going to rectify the iss...
Not posted for a little while as been busy with other things. I've kept the system on Grant's default WC settings. It's been mostly quite mild so h...
I believe it’s all been balanced. Chap said they’re all filling up well once got air out system. Other half has moaned it’s now too warm so dropping...
Heat specialist came yesterday. Initial impression was downstairs rads seemed physically small. And by comparison felt upstairs was oversized. Ov...
Starting to see that even though downstairs calls for heat, when other zones don’t the ASHP turns off due to equal temp in and out. Soon as I upped un...
I'm going with: 2102 - 40C 2103 - 35C That's around 38C at 7C outside. This morning, combined with a bit too much of a drop for upstairs aft...
Oh definately. The house proportionally the said downstairs zone is also the largest, with 2 rooms equal to underfloor zone. I think the hall and land...
Changing the secondary pump to speed 1/3 seems to have had quite an impact. Downstairs can hit 21c consistently. However effectively almost running 24...
Yeah, I've set it back to 45C to see how it goes today/overnight. It's 3C outside. Downstairs zone is showing 20.2C. Probe in living room 19.4C. I...
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Latest Posts
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RE: Adventures in heat loss calculations
@rob-of-york — thanks for posting this, all very useful...
By cathodeRay , 28 minutes ago
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RE: How Accurate Is My DIY Heat Loss Calculation?
@kilgorexv There is a simple rule of thumb by Michael...
By Rob of York , 2 hours 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 , 10 hours ago
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RE: Glass lined Cylinder for private water supply
This has turned into a fascinating little rabbit hole. ...
By Mars , 19 hours 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 , 20 hours 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 , 21 hours 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 , 1 day 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 , 3 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 , 4 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 , 4 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 , 4 days ago
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RE: Cooling with air to water heat pumps
Passive cooling should always be the first call. Keep ...
By JamesPa , 4 days ago
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RE: Do I add Air Con or MVHR to existing A2W ASHP?
@rob-of-york Thank you, I’m thinking along these same l...
By Toodles , 5 days ago
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@Mars Good questions! The downstairs unit did the maj...
By Rob of York , 5 days ago



