dpmiller

Thanks @dnb we already have around 3.2kW on the roof, on a Solar iBoost+ s yes, the summer is sorted.

I can't see a problem (other than overall DHW capacity) with just running the TS up to 55c or so on the ASHP, the COP is always going to make it a better bet than just using the immersion. There's only three of us in the house and only SWMBO has a morning shower. I'm figuring on heating the TS and UF loops on early morning E7 and then the tank will get topped up off PV during the day. Heat in the evening can come out of the TS until the temp drops far enough to bring the heat pump on again but for all the amount of heat the house will sup I don't expect to kill the TS in a couple of hours. Towel rads are just a convenience thing, they're on a separate manifold with TMV so they can be set on a timeswitch and again just sup a wee bit of heat out of the main loop, whether from the TS or the running ASHP Summer DHW will be handled by the PV diverter, allowing the ASHP to do slab cooling in terms of integrating the stove, that's all on the electrical side IMO. The Heatstream has an upper and lower coil and each coil has it's own stat fitted so not hard to control based on tank level. Plus the supply from the stove will have a pipe stat to enable the pump on the load unit. If the stove happens to be lit and adds heat to the TS then good. If not, it's not taking any heat out of the TS...

"scribing"

So general plan is: 250l Harlequin Heatstream TS, twin coil Approx 9kW ASHP Boiler stove, a Woodfire Passiv or similar, on a charging/load valve. Quench coil also. Depending on which calculator I use (Jeremy's, loopcad, other) heating load is somewhere between 3 and 6kW What would stop me from following the plan in the diagram below? Forgetting about the electrical (control side of things for now) the scheme should allow either DHW or heating to have priority and also be able to offer slab cooling, whilst using the TS to act as a buffer. Crappy paint drawing sorry.

spot the Ulsterism- "turn the big light on"...

PM sent

The chap that did my groundworks - a trusted friend I'd add- happens to be a baseworks contractor for H2, I could ask him if he fancies Crossgar for a run...

Looks more like uncrushed stuff as-dugout.. As Declan said, tell us where you are. There certainly isn't any shortage of trades round these parts.

Most car bodyshops will also do interior bits like this, and there are plenty of guys doing kitchen door respray/ refurbs.

no, you just leave the "IN" disconnected from L and then your dry contacts are "IN " and the next terminal. S! and S2 are remote switches, 240V in as triggers.

I don't care what shape it is, it's still the same tech- an edge-lit panel.

to the OP are you looking for focussed pools of light or diffuse light from above? If the latter, then the slim LED panels fit within the PB layer, but you'll need a bit of space above (slack membrane between joists) for the clips and driver.

Probably not as fire-rated means sealed in the event of fire, so often with vents and intumescent material

Dunno if the picture is accurate for the BPC item, mine don't have louvres and have a 10mm or so wire grid.

nope, normall isolators have an arrow on as the seal is only perfect in one direction.

or pipeslice the one directly beneath the isolator and stick a straight coupler on.

I had great price and service from Plug-in Solar, I think they're a reseller for Midsummer, and didn't have any issue with delivering to NI.

that was lucky.

drill the welds out, new bearing, a few MIG spots, done. /except it's probably some wierd Imperial size that'll cost as much as a new pulley...

Is there another pump for the towel rads or are they just opposite the ASHP tappings on the LLH?

https://www.screwfix.com/p/hafele-keku-fixings-m4-x-48mm-10-pack/8663t

do it with a back entry gully and it's then rodable and you've somewhere for your outside tap to leak into as well...

anybody near you work on commercial vehicles or trailers? Common for flooring in them...

or a wee 12v lightbulb if you've got one kicking around...

what's the point of the pocket door between Bed4 and the spiral stair? Surely the handrail will preclude acces to the stair...