MikeSharp01

No home assistant as yet but will have when the house is finished, we do have a zigbee gateway available and zwave. I will have a look at the old posts. I suppose my concern was how fast it dropped against the delta. We have, will have, fibre cement tile cladding on the outside, 8t, which will add some heat capacity as will the rest of the plasterboard on the inside 4+t. I need to do some more modelling now I have some data to play with along the lines you and @SteamyTea suggest to get a picture of the losses so I can verify potential control schemes - probably very simple ones.

On Thursday I managed to get the temperature and humidity loggers running in the house and I now have my first scraps of data. The house has no heating running yet so all the heat going in is me working, solar gain and a tiny bit from the logger power supply. I am wondering if the decrement delay is what I should expect, here is the data from midnight last evening to now, (10:46) so about 11 hours. The upper trend is the internal temperature and the lower one the outside temperature derived from the local weather station, about 1 mile from the house. I hope to have my own external one up and running but my PoE scheme out there seems to have a problem. It broadly shows that the temperature started at midnight at about 14.2 and has come down to 13.7 over 11 hours with an outside temperature around 2 ish. Still more analysis to do but should I be happy with that rate of decline? Not sure what i can do if I am not but there are a couple of colder bridges that will be done when the MVHR Inlet and Extracts are fully fitted and there is only plasterboard on about 30% of the walls so far.

I have started down the road with them and they have accepted our heat loss calcs and that their smallest unit will do the job - so almost the reverse of this. the problem now is that the smallest unit is not MCS certified yet - they are working on getting it certified and we can proceed.

Ah - then you know who the installer was and you can pop the name on the paperwork or have I missed something. Usually at that stage they ask you to upload the commissioning certificate within a given timeframe.

We have 7kW of Eurena panels all made in Spain, price is slightly higher but not much.

I don't recall that question on our application, are you using the UKPN online form? I would have said something like this is request for permission to export an appropriate installer will be appointed.

If you build the extension to a high insulation / air tightness / glazing spec 12kW should still be OK but it depends on the % increase in size and where it is going in relation to the rest of the building. How many bugs are you intending to house.

You can just be yourself, you don't need to be an installer, they have been instructed to deal with individuals as well as companies. I just told them my name - all worked fine.

yes -so Sorry everyone ours was G99, not sure I was think straight yesterday, as well (6kW export Granted on 6kW array)

I when through UKPN G98 as did @Thorfun I think. What was the problem?

Thanks for the reassurance John. Our wood floor supplier, who has done a great job of getting us into a position to go for a wooden floor, tiles being our previous choice, wants us to install a temperature probe directly below the wood to allow us to ensure we don't go over the maximum. They are very keen not to dry out the top surface, 6mm of Ash, not sure the ply below it is anything of an issue. Anyway if it is flow temp then we can get to 60 W/m2 on your diagram, which is stacks.

Don't tell me this, we have 20mm Ash / ply engineered floor, 1 Tog, over ours, pipes are about 80mm down in the slab at 150mm centers. The floor people want us to keep the slab temperature below 27deg C. Doing a quick line across JohnMo's chart we should be on about 25W / m2 and we have 100 m2 of UFH so 2.5kW and we only need about 2kW so we should scrape in on worst days.

Yes its in the corner about 2m from the Un-vented Cylinder (UVC). I was proposing to run 32mm plastic round to that. Is a waterless trap better than a water filled one in this application.

yes I did say it was AI

I need to install the waste run in our plant area and was wondering if there was a specification for the size of the waste pipe needed to handle outputs from the tundish(s) etc around the tank. It will be an MCS install so I expect they have a rule for that but I cannot find it, it's probably buried in one of the standards or hiding in plane sight. Gemini says 22mm but that feels too small to me: "For an unvented domestic hot water cylinder safety system, the waste pipe (also called the discharge pipe) should typically be 22mm in diameter, with the section leading to the tundish potentially being a smaller size like 15mm, but always ensuring the pipe from the tundish is at least the same size as the tundish outlet itself; always consult local building regulations and consult a qualified plumber for specific installation details. Key points about unvented cylinder waste pipes: Pipe size: 22mm copper pipe is usually the standard size for the discharge pipe. Tundish connection: The pipe leading to the tundish may be smaller (like 15mm), but the pipe leaving the tundish should be at least 22mm. Fall and drainage: The discharge pipe should have a continuous fall and be routed to a safe discharge point outside the building. Professional installation: Due to safety concerns, always have an unvented cylinder installed by a qualified plumber familiar with building regulations. "

Like the conversation posting - especially as you work to cajole it to focus on the question at hand! Switching to Podman makes perfect sense, it's open source so will probably evolve faster than Docker - who I see are fighting a solid rear guard action in the new world of contested containerisation, and it uses the docker command line which aids learning. How much, given what you have Git, of it will port straight forwardly and how much re-working is needed, outside anything associated with moving to a differently resources VPS.

PS @nod is not in the wrong job, I don't suppose the average mortgage broker can plaster a wall perfectly, lay a tile flat, build their own home mainly on their own - several times, let alone be able to afford to do that .

It's a balance of risk in that when you think of it the £4K you are paying is going to be relatively small beer on the overall cost of the build and it gets you on the rails with ease. Can you earn the £4K doing other aspects, spend time to save money, of the project in the time you save going via the broker. If not I would perhaps question it.

Yes because self builders are specifically mentioned in the legislation, so you don't need be removing an old gas boiler, and there are some other criteria which mean you are a self builder anyway so easy to meet.

I also use onShape for 3D work it is very good and an excellent grounding if you ever want / get to use the bigger packages like Solidworks, Catia or Autocad / Revitt

Yes one is forced to assume so, or something similar, or this machine is able to warp physics. It has been like that forever and I told them about when I enquired. I guess it's a small company trying to do a good job but it can't quite yet sweep in all the corners. All my dealings with them have been good, professional and supportive.

We are looking to do the same with them, we are awaiting the MCS certification of their tiny unit Pro Inverter Air Source Heat Pump | CE-iH6 | 1.74kW - 6kW to move ahead on it, it has great modulation depth and we, if I have my calculations correct, will only need about 2kW at -3 so it should cover us. Everybody else quoted silly money above the BUS grant.

So the target then is run continuously, well down to minimum modulation after which the HP will run intermittently.

Most cat6 cables don't take kindly to very tight bends although there is a big difference between the indoor, external and armoured cables.

Busy day at black rock then.