Andeh

Any new EV launched in the last couple of years would fall into my catagory of 'battery will last longer then rest of vehicle', especially if the battery was designed and developed within that time period. LFP batteries last longer then NMC type, but are cheaper, lower range, slower charging etc.

Only talking to automotive batteries, and modern chemistry only. The leaf battery was launched about 15 ish years ago? Mobile phones are also probably killed off with aggressive use and fast charging! They are a totally different chemistry as well.

For what it's worth battery technology is my speciality, and premature degradation doesn't exist on modern battery types. Automotive stuff (other then random hardware failures) is lasting significantly longer then most expected. Fast charging /fast discharging very regularly can have an issue long term but v2g type tech is tickling the battery, which would probably be the difference if it lasting 250k miles vs 300k miles! Ie beyond cars usable life.

Yeah, when our heating shuts off it makes a similar noise, and probably last for 30 seconds or so then abruptly stops! DHW doesn't make the noise. Have to admit it took me a couple of months of getting used to the noises and quirks or ASHP operation... But after 6 months it's working well, doing its thing and even a week of minus several degrees it did its job well!

And that's enough Internet for me today!

Does it make the same noise for DHW? Just turned my DHW off and after several seconds I hear the sound of actuators then it just shut off, no noise like yours. However I THINK I hear a similar noise to you when I shut off the heating, via UFH, but only for 30 seconds or so. I presume it's the system shutting the UFH Actuators off, sealing off flow, so the water is forced past the bypass until ASHP shuts down? I'm guessing... But will investigate when in gone and the heating is on next week.

I can't seem to load it, are you able to post to YouTube?

Can you post the video here? I have a gen6 from joules, and I also get a whooshing sort if noise at the heating programme terminates, but I think I have a bypass loop.

And those are the important bits to remember!! Our 9 month went into nearly 2 years... And we had some harrowing evenings crying over the spreadsheets and costings as it all slipped out of our control. I remember March last year asking the builder's office for the final electrician's bill, and her coming back to me and saying 'just over £23k'... And me mid motorway drive dull brakes emergancy stopping onto the hard shoulder in a blind panic... Only for her to go 'oh sorry... No that's the total months bill... Let me get you the right figure' and for me genuinely crying in relief as I accelerated off again.... For her to then come back to phone 5 mins later and say 'no, sorry again I was right the first time, it is indeed £23k' for me to then end up back on the hard shoulder. He was a (expletive deleted)ing shyster. BUT having been in for 9 months now, we do regularly look back and laugh at most of the horrors we went through, the panic, emotion, distress and anxiety which at the time were all consuming. The shit we stressed over which is irrelevant now, and the decisions we forced through against advice and shouldn't have, and the thinks we did get very right... BUT we are thoroughly pleased we went through it, I definitely feel it's made me a more resilient and philosophical person and I think I handled it pretty well at the time all said and done. It also makes us appreciate the place more, and you'll be amazed at how much you forgive and forget when all is said and done!!! End of the days, it's just a (expletive deleted)ing house. Most people won't know, care or take any interest in vs schools in the area, it looking nice and what are the neighbours like? Grit teeth, ensure and just survive. It's all worth it on the other side.

I'm sorry OP, self building can be a long hard slog! A degree of getting screwed over by someone is par for the course, especially if you are average Joe self builder where you have a job, family and are not die hard involved in the build itself. We got taken to the cleaners by an electrician's final bill to the tune of £20k more then expected, he was a useless shit as well.

I'm inclined to agree with Nick!

I wonder if you could do it in a series of steps to encourage the water down the right direction? Not sure how you would create a reliable fall in one direction?

Very interesting!! Thanks for sharing, I am surprised. When I tried to contact Samsung about this, they refused to engage with me because I wasn't an installer!! Could have pretended to be one I guess, but then my questions would show that I am indeed...not an installer!

I'm not hearing any alarm bells ring from a quick read. We're at about 240sqm non passive/2.5 air tight, but still well Insulated... Yet inefficient home (bungalow, high ceilings, lots of glass etc) with a 12 kw ASHP. We run dish washer and washing machine daily and average about 35kwh during mild winter up to 50kwh during very cold spells. System will run luke warm all day during these periods. That's normal. DHW priority over heating is normal, 300L is your hot water not UFH, second tank would be UFH buffer which is optional but for big homes not required. We don't have one. Your 40kwh seems reasonable enough to me. Wouldn't worry about it.

Self leveller compound?

Still sat here waiting. I'm sure we'll get an answer.... Any..... Minute..... NOW! 😆

Dead easy, just stick a lot of PV on the roof. We snuck in with our new build, above average insulation, 4kw solar array. Not sure we deserve it with windows and very in efficient floor plan (big sprawling bungalow with high ceilings) but I wasn't going to argue!

Following with interest as I need to do the same at some point!!

I'd just use a regular polyfill for that sort of hole, and a painters knife! Let it dry, sand it, do it again, sand it... Until it looks good under a torch (if in visible place) then paint with roller or whatever the original paint was applied with in that area.

They say the third one you get right... 😆

OP, i don't think your ASHP is the problem here!! You yourself have said 6000kwh in 10 months... That's pretty normal, and isn't massively far off what we're prob using with our ASHP....albeit we are a large/sprawling bungalow. The ASHP doing the hot water and UFH is costing you maybe £170 a month. Yes increase the DHW to 50 degrees is a good starter if it's causing you problems. Make sure weather compensation is turned on, YouTube, asking on here or getting the installer it another installer to come out and check is worth doing. The issue you have is a farm and further units costing another £5k a year in power....you need to be getting seperate meters installed so you can actually properly assess where that power is going!

And as said.... Something isn't adding up, 6000kwh used for ASHP, assume 7500kwh for total annual usage, at 26p/kwh is only £160 odd a month. Probably a bit less with solar panel..... All seems remarkably normal?? Your problems are elsewhere, your ASHP is working perfectly fine! It's running for long times, at high efficiency, low temps, giving you a warm house for pretty reasonable heating costs. Edit... Also, we changed our hot water temp to 50 degrees for winter usage and the impact on things hasn't been much, certainly not enough for me to feel the need to change it back!! Yes 45 is more efficient, but probably only to the tune of a couple quid a week.

I spent most days obsessed with insulation and checking and monitoring.... But was away with work for the screed pour, and only this winter found we have a thermal bridge from big sliders against our screed floor. The first 6" of the screed is noticable colder... Like I said, you can't win everything! Reality is though... How often do you stand with your toes against the glass, room is still lovely and warm, and overall house is very reasonable ££ to heat...wife thought I was crazy when I be moaned it. No one else will ever notice or care, but it's still taken me months to get over!!

I don't think 6000 for nearly a years usage is THAT bad? For an average newish home. Especially if you are also warming an annex etc. ASHP running for very long periods can be unnerving but it's what they do, you need to run them long and low!

Could you/I would wrap a few layers of Armaflex tape around the form of it to seperate screed from stairs? Few mm will help provide a degree of seperation, will help reduce the problem of it. Use thicker underlay for your flooring. Wood as you plan for, with a carpet runner maybe? (I don't like wood stairs, with the wrong socks on far too slippy) Reality is you're gunna have to suck it up and move on, else face serious serious cost, headache and heartache trying to fix when EVERYONE will roll their eyes and think you're OCD. The £canceled screed alone cost will be worth more then 10 years of that thermal bridging, let alone piss off factor, delays and cost for whatever bodges you try and introduce to fix. You can't win them all! Building houses is not a zero sum game. Just double down efforts elsewhere to try and offset it, move on and forget about it. Edit.. Damp won't come up as the block and beam has dpc and is ventilated to keep it dry anyway.