MikeSharp01

I can see how a thermal mass might glow but how would an endorsement glow?

Hi Just spotted that Danfoss have got behind your research @DamonHD you can read all about it here: https://www.installeronline.co.uk/green-energy/heat-pumps-and-trvs-what-installers-need-to-know/

Somebody - maybe us, needs to put together a briefing paper / manifesto / letter to HMG via the MPs and the PM to let them know what's going on, why it's all wrong and offer some solutions. We could probably send a letter to the majority of MPs, we all live in a constituency somewhere don't we. The challenge will be getting us all to agree what needs to be said.

We need to lay a thin self levelling subfloor, which will then have the wood flooring on it, and I would like to finish the Plaster boarding (PB) before we do the screeding and definitely before we lay the flooring, which I want to be the very last job! I appreciate that I will need to protect the lower portion of the PB, along with doors and windows, up against which the screed will flow from splashes etc. Should I re-think and do the screed first & why?

Rule of law is a good thing in a liberal democracy perhaps not so much in an authoritarian regime I agree - but we are not there yet. Poorly formed laws that pay no pre-emptive attention to unintended consequences should be challenged.

WC = Weather compensation.

Sounds more like you are reading the return temps doesn't it. ASHP output temp does feel a bit low though. Are you getting domestic hot water from the system reliably?

All the suppliers we have spoken 2 over specified the ASHP size. I argued with them all, only two of them listened and reworked it based on the design, and as built, data. Hopefully we are now closing on a deal.

I am not convinced we should wholly dismis combustion, indeed any technology, after all, when you think about it, we rely on combustion every millisecond of every day don't we. It's just we need it to be definitively clean our end.

Surely if we could extract the energy from any renewable resource, such as wood, without releasing the nasty stuff (C, CO2, PMX.X etc) into places we don't want it then it's legitimate to look at how to do it - if you get my drift. Quite how much of the energy generated would be needed to clean it up and how are the billion dollar questions really.

Great - made perhaps before wider concerns about wood stoves but a good watch all the same.

Good news all round - well done, looks cold though!

And the salvage rights go to.....

Well some of them anyway - I teach AI to undergraduate and post graduate engineers, very much tempered by the patterns I have learned about technology and its progress. I am as concerned about the potential of AI as Geoffrey Hinton but I do think it has great potential to help in many places - medical imaging is one, but these are really rather simple AIs. We are just at the find and exploiting the opportunities phase in the backwash of the Large Language Models (LLM) really. Recent research undertaken showing how LLM AI might find ways to protect itself from our intention to turn it off is worrying but for me - and I would not want to hijack this thread as it is a genuine challenge for @Garald, almost none of it is possible without leveraging the services of the big players - such as Google (Tensorflow /Keras) and Meta (PyTorch) so we are slowly moving ever closer to the grip of the corporations for more and more of what we do - this much I have learned.

Yep - learning to learn is more important than learning any single subject and embedding lifelong learning alongside a reflective practitioner approach makes everyday a school day!

Have you got ducts in place to handle all of this or will you need to do major works to get the cables in and around?

Sounds a lot for a 68W pump, has to overcome the head issues and then deliver flow. I would isolate all but the ground floor (assuming the boiler is on the ground floor) and see if you can get a decent heating system out of that single manifold I think that might give you an idea of the scale of the problem at least. Others will have other ideas I am sure but that would be my starting point.

How hard can it be to derive a curve that takes account of all these factors. I know that here, because we are only exposed on one quarter really that when the wind is in that quarter the heating has to work harder.

Good idea and when you fit them make sure there is no rust on the case metal, if there is get a rust killing metal priming paint, paint over the rust and when fitting the screw put a dab of silicon seal in the hole to prevent any water running past the new screws from getting underneath and rusting the case any further.

Have read it, found it praiseworthy in its frankness and sense of surprise that what looks like Heat Geek's anecdotal view was found to be correct, and it answers many other questions while raising a few more in my mind. Firstly for our build which only has slab UFH keeping the bedroom temps down, what you describe as TRV clamping, cannot be done so may be a problem and although I have read loads here on this challenge. Meanwhike here at Millstone Manor we have TRVs on all the rads. Our boiler is now almost 10 years old and has no WC feature so runs on a single central stat. We have experimented this year with turning up the bedroom settings, lowering the flow temperature, to leave the boiler running for longer no full results yet but lowering the temp has had +ve impact.

You don't necessarily have to stick with the 3.68 kW, do a G99 application and ask for more. We did that and asked for 6kW export limit on single phase with 7kW of panels connected and it was granted. You may be unlucky and live in an area where everybody has solar and the local infrastructure can't cope - they have to allow 3.68kW of export but after that it is down to the DNO - so very little is lost just asking.

Just had another look at your photos. The boiler image is showing 39 deg flow (out) and 38 deg return (back in) on the heating circuit. Is this this a true set of numbers because if it is it suggests some sort of bypass so water has found a way back to the boiler without going round the heating loops. Maybe an open valve somewhere?

Hi Junaid and welcome to the forum for people like us. A couple of questions: 1. When you did the hose pipe connection did you get good flow through all the lines? 2. It looks like you have two manifolds, is that right, and if so how are they connected together. 3. Is the pump a separate unit or built into the boiler? If separate can we have a picture and the makers plate to show what sort of a pump it is?

No built in extractor though!

So if you choose a lighter but better insulated roof a meter or so higher you won't be adding much weight on the structure below and maybe none at all if done with care and engineered well. I like the idea of the half lift but think that might be a structure too far - worth the discussion though.