dpmiller

to go through the timber frame on ours I used these: https://www.schiedel.com/uk/products/additional-ranges/ignis-protect/

Now it's not much more than an anecdote but... there's been s few sunny days this week. Reported diversion is about 10kWh per day (yes, I'm running hot water off every evening to pull some energy out of the TS) bringing the store back up to 88c and both stats satisfied. I've been able to do some monitoring of the DHW coil performance in the process and can see that the deltaT between store and flow out of the coil is around 10c at 10l/min sustained, less at single-tap flow rates. Plus the coil's volume means it's even better than that for a quick handwash. Oh as 20secs for hot to the ensuite which is about the longest run in the house. But what I find more interesting is this. I've been having difficulty believing in the heat loss calcs for the house, it's hard to wrap yer head round such a big house only taking a few kW to heat it. So while I'm surprised, I'm also pleased to see that since commissioning the TS evening temperatures in the house have dropped between 2 and 4c from a stifling 22-24c to a rock steady 19-20c. And all because the silly wee 800w halogen heater that I'd connected to the diverter isn't trundling away all day...

or you could go poured and down to 50mm

iBoost is more configurable and can drive two loads, plus has the option of the Buddy remote display

would the steel bend up a touch?

There are plenty of blokes in the local papers that do extensions and stuff. I'm gonna say try running your design past the chap that did ours from scratch as he's... good. PM on the way

Have you desgns finalised or do you still need some fine tuning done too?

I have two apps- Network Cell Info and Cell Tower Locator. The former tends to show the coverage centre of a tower whereas the second has the actual tower location

the grey bits are European sized IIRC.

why is copper a must?

Love a neat bit of TIG

It's an Afriso pump station for the boiler stove, Like a Laddomat. Recirculates the water in a boiler stove until it heats to a useable temp before letting it into the tank. Improves combustion efficiency and boiler life.

Fakro do a smart sealed and insulated door for this kind of application,. We've a couple of similar spaces in ours ( however they're "inside"in terms of insulation and airtightness) and we put a pair of these doors in. They're pretty good quality and not at all expensive https://www.fakro.co.uk/products/all-products/loft-ladders/dwk/

Hot-press plumbing done, give or take. Just need to bring some cables up to a wiring centre on the wall and that'll be it for now.

It's as supplied, but I'll look into a copy of the MIs for the valve itself, thanks. OK for completeness it's a Reliance tempering valve and good to 99c

OK so what's the normal max to run a TS at? Fairly sunny today and both immersions (upper as master, then the lower one) have tripped their stats with the tank now at 82c. Aim for 85c?

and check out the suppliers on the "other" side of the Irish Sea too...

regardless of the price of panels I'd suggest a trailer or something is a near-must for a build...

And it keeps on keeping on. Down to my last stack of plasterboard. Been doing some diggering of soil and rubble outside so the topsoil mound is smaller than it was and we've an inkling of the shape of drive and garden. But more interesting stuff. As I'd mentioned elsewhere I'd ordered the thermal store- from the lovely people at World Heat- after it became apparent that Harlequin have moved away from larger and multi-coil variants of the Heatstream. Bit of a b*gger as I'd already pre-plumbed some stuff with it in mind. Hey-ho. 270l active, with expansion space above. Direct tappings from the boiler stove, an HP coil (15mx 35mm corrugated), a 15mx 25mm DHW coil, and two immersions. All in stainless. So tank is in place and sufficient of the plumbing done that I was able to fill it last night; from a stone cold start today it had got to over 51c and tripped out the 'stat (that I'd forgotten to turn up...) off diverted PV, and today wasn't terribly sunny. 7kWh diverted, according to the iBoost. I'm very happy with that.

dunno. No reason why tho...

what's wrong with composite?

I know a lot of folks here recommend Telford but I'll throw a nod in for World Heat- you're not forced to go through a merchant, fully bespoke as necessary and (essential for me) happy to deliver to NI. Their coils seemed a bit bigger to me than some others I was looking at too.

no service void on the inside will be a pain.

on his own or does he bring someone/ use you as labourer?

Better to go 8.5kW and modulate down even on the Gold Coast... The various different calculators all come out between 2.5 and 4.5kW for our place IIRC but I'll be going somewhere between 8 and 10kW to ensure plenty of headroom for DHW.