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Last seen: Jan 28, 2026
@iancalderbank These 2 photos show pipe work to what is Bed 4 above this space
Sorry @derek-m , setting up a spreadsheet now.I reckon quickest I could do this is every 5 minutes due to the Grant panel takes time to actually get t...
Thanks Derek, I probably wasn't very clear. It's finding a time when a cycle actually runs that I'm finding difficult currently as it's not often. S...
Thanks @iancalderbank The plant room is lagged, that photo was taken prior to that being done and the LLH install being correct (Was wrong way round) ...
Hi Derek, sorry hadn’t got to that yet. I have some time off in a couple of weeks and should be able to do some proper calibration and mounting of pro...
Thanks all. I’ll try and summarise this back to builder - and list that back here. Playing devils advocate, if plumbers feel they’ve done instal...
Safe to say I don’t think upstairs is undersized rads. Hearing off over night and a number of windows open. Most rooms sitting at 18.5-19C. Landing 19...
@derek-m pipes connected seem same size. Honeywell valve detailed label was on bottom didn’t realise - attached. its a V4043H1056 I...
Photos of the downstairs valves. Note tonight I’ve actually turned off upstairs at the heatmiser as we’re just too hot upstairs. In morning going to...
Thanks Derek Longer runs to downstairs from trunk line - yes however - upstairs will have longer main tund total as the rear of downstairs is underfl...
Was surprised by them saying it was 22mm, this photo was the one that made me think the size differential between the main and branch to rads looked b...
Thanks @iancalderbank , we’re obviously past point of upping the pipes, am very frustrated they made such an error. however the upstairs uses same a...
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Degrees of Separation
Latest Posts
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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 , 5 hours ago
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RE: Adventures in heat loss calculations
As others have said, well done, and thank you for posti...
By cathodeRay , 5 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 , 14 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 , 15 hours ago
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RE: How Accurate Is My DIY Heat Loss Calculation?
@rob-of-york Thank you for that, whilst familiar with t...
By kilgorexv , 15 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 , 16 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 , 19 hours 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


