Barney12

My sheds are poo stain brown. Flipping National Park planning!

Looking good. Nice use of colour. I played it really safe. My place is "50 shades of grey" Actually largely based on this smutty book: https://www.amazon.co.uk/gp/product/1849757127/ref=oh_aui_search_asin_title?ie=UTF8&psc=1

The matting is at the same level as the finished floor so I can’t see it’s an issue?

Another reminder to at the very least pay the deposit or first £100 on credit card: BetterBathrooms retailer in administration https://www.bbc.co.uk/news/business-47418514

Whats the vented grey box pretty much central? Shame about the SMART meter

Also have a think if a matt well is something you want. You can use a square edge profile to create one. If you’re going to need an entrance mat then it’s far neater than something that you’ll continually trip over or that creeps across the floor!

Or if you prefer a section of square edge trim and a mastic bead where it meets the door. Something like (random google search) https://www.v4woodflooring.co.uk/product/square-edge-profile/ Personally I think that looks a little more professional than scotia which is a bit “DIY”

Normally just scotia trim. Either to match the floor or skirting or in white upvc

Completely agree. In fact I’d go as far as to say that the higher education system in this country is morally bankrupt.

Close up of label:

Nope. I’m fairly certain that’s not the case. There was a lot of miss-information and specification changes in the final throws of development.

Yes, my understanding is that it’s just one element. I’ve been told that the actual heating part is much longer than a standard immersion element and is designed as such to maximise its life as its non serviceable. That’s a point worth repeating; the heating element is in no way serviceable and if it fails then the whole unit needs to be replaced. Heres whats behind the service cover

That sample size is most definitely 2! More importantly the 50/90% "feature" is confirmed by the manufacturer. The problem statement is about the effects of that implementation on its advertised performance NOT that the statement is incorrect.

My BCO was exactly the same. Put your tin snips away

Sorry Nick but this is just wrong. ANY system should be able to cope with scenarios that are "not normal" its called a bloody boost or override switch! To give you just one of numerous examples I could think up: So I'm Mr Smith who has no knowledge of how his system works and has NO boost or override switch..........."Dear family, please don't go away for a few days and leave me on my own. I'll have to have three showers in the morning otherwise the water will go cold tonight when I have a bath and I can't do ANYTHING about it" Add the complexity I have which is where my dual 12kwh Sunamps provide DHW and Undefloor heating (220m2 passive standard house) with NO other form of back up and I can can really screw your head with "not normal" scenarios. For the avoidance of doubt the system was designed by Sunamp originally as two 9kwh units but after they both completely failed they were upgraded (FOC) to 12kwh.

One thing first; I have nothing but praise for @Nickfromwales His commitment to detail (his OCD almost matches mine!), work quality and ethic are right up my street. In fact if it wasn't for his input and intervention in my personal Sunamp journey (much of which is not written on this forum) I would have personally driven from Devon to Scotland and poured the salty goop through Sunamp's letterbox! Now that's said, I'll continue: We appear again to be having endless string of conversations about "workarounds" when actually we should be focusing on what Sunamp are marketing and what you get. My focus is on the electric units (as that's my only reference point) What I believe to be factually correct based on the information provided thus far is: They are not a direct replacement for cylinders or thermal stores The usable capacity (and thus comparisons with the above) are not as advertised They do not and cannot optimise PV. That is simply an untrue statement when they have to be 50% depleted before they call for power. Also; the soft start function throws many PV diverters into a spin! Even THE MOST BASIC of DHW (and space heating) system allows you to "boost" your energy requirement to cope with scenario's where "normal" demand is exceeded. With the electric Sunamp unit you simply cannot do it. I'm sorry but that has to be a fundamental design flaw. End of chat!

My energy meters provide the same sort of values so I'll agree your best guess.

Why are we debating "work arounds"? The product should just do as advertised! It doesn't!! "End of chat" (to quote a Welsh plumber from around these parts)

I’ve seen it done a few times but always battened first which might cause you an issue with your gables.

Wallpapering is immensely satisfying. A few hours of hard work and an instant finished result.

Once apom a time maybe. But a plasterboard skimmed wall dries relatively quickly in normal conditions. https://www.grahambrown.com/uk/how-to/how-to-apply-wallpaper-to-newly-plastered-walls/Blog-HowTo-WallpaperNewlyPlasteredWalls.html

Modern renders are certainly less susceptible to cracking but (and its a big but) if the substrate it’s being applied to isnt stable then it will most definitely crack. Just take a drive around any modern housing estate and you’ll see plenty of cracked modern renders but this largely down to the fact the render is applied before the blockwork has dried out or the render hasn’t been properly decoupled from a (shrinking) timber frame. I assume by “high build” your builder is referring to the silicone based coatings that the render manufacturers sell for rectifying issues? If this is an existing building is some form of renderboard or EWI with a fresh render coat an option? It will almost certainly be cheaper than the incredibly labour intensive route of trying to remove the old render.

According to the literature the units are a "direct replacement" for a vented or unvented hot water cylinder or thermal store (depending on the model variant). But as has been pointed out; they are not because you have insufficient control of the ability to re-heat/charge regardless of whether your using grid electric or diverted PV. And low and behold we're back to the same question again; Surely Sunamp just simply need to change the software configuration so that the units will accept charge once the temp sensors have detected any level of depletion?

Sorry to be grumpy and to the point but; All of this conversation about model types (which frankly is as clear as mud!) is secondary to the core issue. Surely Sunamp just simply need to change the software configuration so that the units will accept charge once the temp sensors have detected any level of depletion. The temp sensors clearly know when the units are full so it can switch off the heating elements thus the reverse must be equally capable? This would allow optimisation of PV in the same way as the old units. I remain of the view that there is something they are not telling us. Does the above have some form of detrimental effect on the phase change material hence their decision to impose the 50% level?

I'm somewhat flabbergasted by this post. In all my communications with Sunamp the "+i" option has never been mentioned. The system was specified by Sunamp with the full knowledge of my desire to maximise PV usage. If what you've written is right I'm at a complete loss as to why when Sunamp replaced my entire system (2 units) at their cost they didn't change my units to "+i". Can I ask where you got this information?