Marco Van Bowden

And that the rub isn't it? You can drain it, should the need arise

Me too! This thread on it own (took me over five days, on and off to read) has made me "think again" I wanted: 1) Set and forget 2) Scalability 3) Longevity To my eye, one seems to fail. Two is fine, but even three has or had? it's niggles. One thing I saw, but confess I overlooked, was weight. OMG! That's a ground floor based install for sure isn't it? No first floor, or basement stuff there ? Cost is double/three times. Serviceability is growing, but... Technical support is (yes, yes, pandemic) thin on the ground... For me personally. Nah... The timing simply isn't right. I will speak to my plumber Tuesday morning, but I think SA needs to fix it's controller and step away from the moody double glazing salesman myself. To my understanding, they need a controller for those that just want basic (normal?) Features, and those that want to play/tinker/monitor EVERYTHING! So to me, it's snog, but I've got my eye on someone/something else now...

They do dummy Ali and dummy MDF. As with all things, it's gotta work for you doesn't it? We are rewiring and replumbing the entire house, so makes sense, and if not done now, when? Given no one else has contributed, let's hope it a success vs PITA! ?

Well, I'm keen to know how you get on buddy. Keep me posted. PM on the way ?

True, but the volumetric and thermodynamics can of course all be calculated and factored into the systems design. Back into English man... They will size the system, much like you would with traditional heaters, based off your room sizes. So... Can I conclude from this I will be the only one on the forum to "take a punt" on this stuff? Honestly, I didn't expect that! ? Come on people, share the love!

Presumably it on their website someplace, but more interested to see if anyone has tried it. Oh... And this stuff doesn't look like the old tosh I "think" you are talking about. It "looks" like regular skirting board. Just ali vs MDF or whatever. Still, being ali, you'd want a good plasterer! ?

Something else. It's skirting board heating. Oval pipes running behind the face of the skirting board. Looks like skirting board. Seems like similar material to aluminium window frames. Feed with 15mm pipe.

OK Has anyone got it? Able to advise if they are happy or not with their purchase?? Anything they would do differently if they had their time over again??? I did a search and got nothing useful, so figured... Why not ask. NB: As a bit of a noub, if one of the admins could move this to the most appropriate section of the board, I won't mind at all! Thanks in advance ?

So we have predominantly a mix of avoid, or snog. Not anyone (from what I can see) saying marry. Question: If Sunamp did a controller that was effectively a copy of what Mixergy have, and we round the numbers for illustration. So Sunamp 3k for a 12 and Mixergy 1.5k for there 300L tank would this sway anyone I wonder? I have to say, I'm being "forced to look again" at the Sunamp, as I expected far better product knowledge/support (yes, I aware I'm asking lots of questions when a lot of their are furloughed) but it just doesn't bode well for the future does it?? ? @Barney12 I "feel" your pain, so I'm leaving that well alone... <Shifts quietly towards the exit>

Snog, not marry mate ?

I thought UK showers were between 6L and 10L, but hey. Point taken. Tar. From my reading, there doesn't seem to be anything conclusive. A lot of venting/frustration, and some very creative ideas, but I would like to have seen all this collective toil come to something. Shame really. Perhaps, snog? Allowing for early teething problems.

Why? 20190219-SunampWarranty-final.pdf

...so, is it snog, marry or avoid? I read the whole thing (took me five days, on and off) and I still don't know ? Oh, and here's a can of worms. I assume you can only get the generation 3 SA's now, correct?

Sod it, I'll bite. Why? Different units seem to offer different flow rates, from what I saw/understood.

? Interesting, but ultimately... Nah. Not for me.

I'm not going to be running any PV

I'm not convinced I need any more than a 12, so 370 or 380L at 40c anyway. I could be wrong, but I think someone said a SA 12 was only good for 280L at 45c. That still seems like ample for what I need, but hey... Good to know I guess. Tar

Going to need that regardless of UVC, Sunamp, or... Curve ball. A Mixergy. So can't see the relevance of this last bit to be honest. Also, what do want 85c water for? ? Don't get me wrong, the feedback has made me stop and think perhaps I should "look again" but I do like the scalability of the Sunamp and it's set and forget characteristics. Right, let's read what Dave has done...

Peter & Nick - Thanks! Anyone else, chip in as necessary. I'm skipping over the waste water recovery stuff, as core theme here is Sunamp vs Megaflo or UVC and Peter has made some valid points. Oh, and Dave... I'll read it and come back to ya. Cheers! So... Calculations. Fag packets ready guys? ? So let's say a 12 holds 12kw (yes, I read above Nick, please let this slide for now) and the combi kicks out 24 on the CH circuit. We could round down to 20 kw for age/degradation or 15, or hell 12 and be done. So... Is it reasonable to assume that the combi can kick out enough heat to melt the PCM (I assume yes, this is north of 65 degrees isn't it?) So the combi would effectively charge the SA in no more than an hour. Probably a little less. Fair/reasonable? So, if the SA only asks for charge at 50% and we went with 280 litres. 140 would be left. 140/25 is five minutes, flat out. https://www.showerheadhosesmixers.co.uk/getting-a-good-shower-the-wright-way/#:~:text=A typical UK power shower,to 10 litres a minute. This link tells me, that'll allow both showers to be run simultaneously. At 10L per minute, each. So seven minutes vs the five above. Let's also tick off that the combi is charging the SA at the same time. So is it fair to say both showers could be run, simultaneously, even with the SA at half full, for ten minutes? Now, two things jump out at me. Chances of both showers going at the same time, low. Chances of that happening when the SA is at 51% charge, even lower. And should it happen, the worst thing is... You've had 10mins in shower, stop wasting water! Fair/reasonable? So, how does this differ to a 300L UVC at £1,250 or a £2k 400L unit? I assume they would have a sensor in them, so once say 100L had been drawn down, the cylinder would ask for more hot water (via the heat source, so in my case, the combi) to replenish itself, depending on how things are set-up. Combi fires up and supplies hot water. I'm guessing it's only possible to set the SA at 90% or 50% (Thanks Peter) whereas the UVC is either "always" holding 300 or 400L of hot water, by simply asking for it straight away, or the threshold is something that can be set to suit the individual requirement of the user, right? Last question, if a +I unit was purchased vs a non +I unit, all I would gain, is the ability to charge the unit overnight via the 5p per KW deal from our friends at Octopus energy, correct? Oh... That, and should combi die, which let's face it, it will at some point, I could still enjoy hot water.

WOW! You boys have been busy, I feel honoured! Thanks lads ? @Nick, on the assumption you know, when does the SA call for more heat? Straight away, or as PeterW has suggested?? And with in that, if the LPC is being used to charge the SA (vs the +i) what is the charge time? Conversely, what is the charge time via the +i? For a SA 12?? @PeterW you make a good point, but as I've already said, we don't use a massive amount of water. In the last year we have never gone over 1,100 liters in a day, and only gone over 1,000 liters one a handful of occasions. I freely admit that the main draw card for me is "set and forgot" so if we say the SA is what, round numbers, £2,500 and a 300L megaflo is what... £1,250 it's the maintenance thing. I do like the scalability of the thing, so if (and I do honestly doubt this) I find I need more hot water, surely the SA is more scalable, yes? Oh, and the combi is only being retained as it's done very little work, and well... When it dies perhaps it'll be upgraded, but until then... Why not use it?? ...and yeah, the combi will feed the kitchen sink. PS - House is a long way off passive, but it is over regs.

Maintenance, or the lack there of. Sure, the 400 litre tank will be half (a third?) The cost of a SA 12 upfront, but the UVC needs love. As I understand things, the SA (charged via my 24kw combi remember) doesn't. What is the marketing blurb? 10k, 40k, 82k cycles and zero degradation? It's hard to argue with those numbers. Past that, if the charge/discharge is something I need to be aware of, let the education begin! Ergo, let's take ya 280 liters. When does the SA say to the boiler. Eh! Bitta hot water please boss? Meaning... 280 divided by 25 (for the max flow rate on a 12) will yield ~11 minutes of hot water. Seems fine to me. But! And this is just a guess, Barney could quite easy give situations where there is a need for back to back bath/showers/hot feed dishwasher/hot feed washing machine/etc, etc, etc that means the PCM in the SA can of course be effectively trickle charger via the combi, and drawn off at mains water pressure/considerably faster. But! How does this work in the real world? Nick perhaps??

Hi Peter, I've not quite read the 16 pages from February 2019, but ya name rings a bell ? OK. I've had a smart meter fitted (via Thames water) just under a year ago, that has pretty much told me I've only nudged 1,000 liters of water in a given year a handful of times. Thus. Do I really need two 12's? Yeah, the house is bigger, but the number of occupants hasn't changed. In the new layout we will have one bath and two showers, and I was of the understanding that the HPC on the SA 12 was good for 25L/min, or am I just being naive? Pre building work, we had a shower over the bath in the bathroom. Again, if I'm being naive here, fine... Tell me, but I thought the 12 was good for 370 litres of hot water, so I was going to go with 350 and thought... Sounds fine to me. That's comfortably a third of what we use as a family. When we go to bed, the heating switches off and the boiler effectively charges the Sunamp ready for the next day. Unless! Octopus tells me the grid is giving away free electricity again, and I'll charge the Sunamp from electric instead. Or will I? More reading to be done... ?

Hi, Looking at a Sunamp and not really getting anywhere fast ? Hoping to tap into people's knowledge please!?? I have a 3 bed semi that is effectively morphing to six bed 3.5 bathroom home. I want a Sunamp, after having seem them via fully charged years ago. The corgi registered plumber (via the builder) is a nice enough chap, but not really interested in reading page after page of manuals about a product he has never heard of vs putting in a megaflo that's he's done hundreds of. The plan is to use the existing 24kw combi to charge the Sunamp, and have the Sunamp do the hot water for the house. The combi itself (as I'm on mains gas) doing the heating. Plumber wants to know how to plumb things in. Which seems pretty reasonable to me! Sunamp seems to want to sell me a solution, whereas, I just need a product, if that makes sense? Anyway, what does your respective collective knowledge say? And is there a way to private message people on here?? As I see a few threads from 2017, 2018 and thought best to start a new vs trying to bring them back to life. Any all help welcome