Nickfromwales

You got that bit right. There's a reason they don't engage with the public any more Some people buy a dog so it can do the barking, and sometimes, people who don't want to enter the ring anymore, buy one to do the fighting..

The correct procedure is to use the existing manufacture fittings to convert to copper tails, and then push Hep2o onto the copper. The copper divorces the different manufacturers.

It never went public, therefore you made an assumption

NOPE! Off the 'net; The new Thermino range contains a new and improved Plentigrade P58 phase change material (PCM) They did a PCM34 and then a PCM43 ( I was part of an 11 strong group to spearhead the design and implementation of this unit ) but they must not have pursued this as above. The lower temp units would have been way more reliable tbh, as the failure of the rest of these ( 58's ) has all been attributed to the immersion overheating ( and destroying ) the PCM. To 'melt' the PCM58 you actually need to heat the SA with much hotter water or it takes an inordinately long time to phase-change. I routinely set wet heat to go into these at 65oC which seemed to work quite well. The units with immersions were ( are? ) still prone to issues with spewing the overheated PCM out through the PRV. I've got a dedicated photo album of these gone 'pop', some where it was so violent that the nuts sheared off the lids as they bent upwards. By comparison, I have been to 2 failed UVC's in my 30 years on the tools, and both were either installer error or where the client had neglected to service / maintain the installation, so basically a near zero fail-rate for UVC's. I'm not a fan of the Mixergy tanks, sorry, just way too much faff / external components / flow switches / pumps and the associated heat losses from all the stuff mounted externally. A simple UVC wins the day, just get a low-slung secondary immersion installed and then you can use 100% of the low / sporadic / proportional energy from PV diversion control.

Ouch.

Yup. I'm just tired now from writing their name and the word fcuked in the same sentence tbh. Apparently, the boneyard at their HQ is "considerable". The architect is a buffoon. Still a buffoon. Because :- How the feck can you vent stone cold air into the room that you are 100% reliant for to glean input heat from??? FFS?!? The guy is one brain cell up from a turnip. He's just invented "perpetual electric bill". Je-sus.

Yup. Go flush yourself!

A heat battery supplier I am familiar with is suffering multiples of failures of their, now eye-wateringly expensive, units. I've received pictures from two clients since xmas who have had failures with their units and damage done to their property. One is "not on his first replacement unit"... A Telford / other unvented cylinder is cheap, simple and very reliable, and all of these will "work with Octopus" Contact Trevor at cylinders2go and mention my username and the forum and he will look after you on a price for a cylinder. If you wish to charge this with cheap energy in a short window, you can ask Trevor to fit multiple immersion heaters into this so you can heat it very quickly ( to match half-hour pockets of cheap rate electricity etc ) so can all be done with one unit, very simply, and very reliably. Reliability is the key here, as the heat batteries are, unfortunately, dropping like flies ( from the feedback that I'm receiving.anyways! ).

Outstanding mate. Restores faith in humanity, when people jump in and help someone in need.

Yup, +1. How old are they, and are they convectors?

Is there any mention of a crane, or just heavy vehicular traffic?

Simple option is to go for an insulated raft, with 300mm of EPS 100 under it and a 120mm reinforced slab with tied A142 mesh. If the ground is that hard, a raft is a no brainer. It'll make for a much nicer working space ( slab won't be ice-cold ) and you could ( I never said this, right ) install UFH i it, zoned for the working space, and for the "office" area accordingly. You will, never again, mention the word "office", or document anywhere this repurpose of that internal space, it if it coms to fruition, so we bear no guilt in telling you to strap a manifold and ASHP to the slab and heat the "office" and "workshop" as you then please. I know I would, without a second glance. Or, just be happy that the "office" has an insulated floor, and retro-fit A2A AC ( for heat & cool ). If you want to work on tractors in the depths of winter, you'll thank me for the above.

The weight will be a huge problem. Most floating shelves are hollow, with strategic timber ( usually ply or pine ) inserts to accept the fixings. The reason for the thickness is that the brackets usually feature a dowel of 16-18mm, or thicker dependant on projection, so need a depth of thickness / cavity to allow these to be integrated. Move away from MDF, as it's not the right product for this instance Where are these to be located? What purpose? How heavy the loads?

Gentlemen, you are reading above and below the lines. One of my neighbours ( immediate as were semi-detached ) are the nicest people that I dare you to attempt to ever find replacements for. The "new" wife of my also outstanding next door neighbour, of 16+ years, is a complete and utter, acidic, erosive and outright minge. A walking and talking bitch of an order of magnitude that I've yet to witness, anywhere, at any level. I have had to make 'more than one' police ( attendance level ) complaints against. She is now bound over for 2 years, eg to keep the peace, and the fcuk away from me and mine. If she were male, the police would have been coming for me instead. So; ...this, I do. My only respite is that she drinks excessively, from lunchtime until "floor-o'clock", and has 20 years on me. So, ( in theory ) I can look onwards with hope that I will live long enough to go piss on her grave. Some people do not embrace, or deserve, the gift of life, vs those who sadly lose theirs in untimely circumstances. Can we talk about something else now? This is getting to me.

All I hear of is neighbours being assholes, happens lots of times, sadly. Green-eyed monsters or just utterly miserable bastards each one of them. For some, death is a convenient end, but, ultimately, the only end that would ever be arrived at for peace to be restored. These think that perpetuating misery as a pastime is acceptable. What’s wrong with just getting along?

Correct. In the summer your heating will all be in the summer / off position, so I don’t get why your system would come on, to heat anything? Summer sees the ASHP > UVC directly, and the buffer remains isolated and dedicated to the heating primary circuit only.

You wouldn’t have the ASHP firing without demand downstream of the buffer?! Call for heat would fire both the primary ( ASHP ) and secondary ( pump at buffer > manifold if required ) simultaneously, and when the buffer gets heated to the set point of its stat the ASHP will rest, but the UFH will still continue to pull heat from that body of water ( buffer volume ) until the buffer stat kicks in again, and repeat. Call for heat goes away, everything goes to sleep. Simples.

If it wasn’t, the boiler wouldn’t fire. There’s no “exploring” a buffer, just a buying one, and-a fitting one. The UFH won’t ever work correctly if you want it to run independently, and it’s completely reliant on buffering via the rads atm.

It only needs to be teed in immediately before the stack goes from horizontal to vertical ( drop ). This doesn’t need to be upstream, as any length of horizontal pipework will introduce a natural air break ( where the air flows up and over the body of water ) and the issue only becomes an issue after the pellet of water has started to fall rapidly south, creating behind it a vacuum. It is that vacuum which causes the air / water to be sucked out of anything with less resistance ( so a basin or shallow shower trap vs the toilet bowl ) in the absence of an AAV. If it was sufficient, nobody would be paying twice the price for twice the AAV I come up with plenty of good ideas / cheats / hacks ( as the kids call them nowadays ) and none of the get off the ground unless the BCO is happy. Ultimately, fit what you wish, and demonstrate it functioning to your BCO. If they’re happy it matters not a jot what I say, or anyone else on da ’net. 👊. Most BCO’s say to me “if the internal stuff ain’t right, they’ll be calling you back, not me” then they shrug their shoulders and walk off to look at drains.

Literally, the lowest denominator.

Did they have true geothermal or the geothermal intake for ventilation? https://www.gogeothermal.co.uk/products/mvhr-awadukt/awadukt

Water dripping / leaking, or evidence of it doing so but evaporating before it gets to form a drip. Well aware of this, and agree it's a last resort. But if it's a joint under a floorboard etc then this is the way to cure it without pulling the house apart. No apparent or obvious leaks / drips yet reported by the OP so I rules out the obvious.

My advice would be..... "stop staring at your hot water cylinder you saddo!" There. Problem solved.

That's because even Bernard Manning covers his ears when you get going

Yup. Those are the weapons of ( my ) choice. Best to remember that if you’re looking for good results, you should really be looking at kit which is PH approved / compliant.