dpmiller

Don't randomly check, observe. Does the motor start can you hear the ignitor crackle? Is there a click from the solenoid valve? And because it's a Riello, does it have a hydraulic flap, and is it opening? And... because it's happened twice to my dad's now... is there a possibility a mouse has crawled inside and is stalling the fan?

Other than the Salus auto-balancing actuators Clive, they tend to be wax-expansion rather than solenoid. Bit like a TRV body with a heating element integrated. As the actuators only take a few Watts it's no problem paralleling them, or instead you can link the inputs in the wiring box. And you'll probably need one of those, to get pump and boiler switching, delay tiing etc...

Our dry ridge is pretty much invisible. The edge of the roll-out is just about flush with the ridge, and the clay ridges interlock with the retaining Tekscrew sittng into a recess in the ridge. Uni-ridge here: https://www.lbsproducts.com/roofing-accessories/ridge-tiles/clay-ridge-tiles

ours are all 89mm CLS. One consideration might be the door linings you're thinking of, standard or bespoke?

yep

Not a UVC but I did buy a TS off them a few months back. Great folks to deal with, fully bespoke, easy to pay.

All our walls sit on a course of quinnlites.

the blower is darned-silent on our Solido, to the extent that I occasionally put my hand over the air inlet pipe to check it's drawing air. Blower sits inside a sealed box, in the middle of the manhole. Now when it's doing it's occasional (twice a day IIRC) pumpout there's a very obvious-from ten-feet-away pouring gurgling water noise. But that's only for a few minutes and you'd have try try, to catch it...

plantar fasciitis? Have you changed to a heavier quilt recently? Spent lots of time on your knees?

who and roughly how much? PM if youu want...

you can get 2-part trims that fit around the pipe, either round or for 45deg penetrations. https://product-information-finder.schiedel.com/uk/product/2-piece-trim-collar-45-degree/

Looks like an ESBE valve actuator but there are quite a number of types...

when the stat is "on" a tiny heating element heats the bimetal strip, so that it accelerates ahead of the ambient temp slightly.

IIRC when I was doing the calcs for ours, LoopCAD always came out very pessimistic compared to jeremy's calculator.

What thickness is the media? G3 or thereabouts is easy to get hold of in tthe garage trade as it's used in spray booths. I've a big roll of it in the attic... Tends to be about an inch thick but can be squeezed down a fair bit or "torn" into a thinner sheet.

why do you say that? 2 pipes and a couple of wires. No need for any accreditation or fancy signoff.

if it's a loose nut, you'd be best with a rubber washer

sounds like there's air in the system, tbh.

I wonder what the outside temp was last night- perhaps the anti-freezing setpoint was reached?

and it won't be at full chat all 8 hours.

try this: https://www.schiedel.com/uk/products/additional-ranges/protect-box/ we've used Ignis Protect to go out through out timber frame

I'd be more worried about pressure blowing out the H/E, they thin out over time...

we know that the Mfr's controllers tend to be pretty sh*t too, whether Vaillant, Carrier, Samsung/ whatever. @ProDave is using good old-fashioned "heat for me now" control. Time to stick a simple stat in series with the stoopid programmer...

but you could use either with copper...

you do remember the TS has a heat exchanger in it? So the output temp varies with flow rate, and the body of water is cooled as the cold water flows through the coil. /BTW I've fitted one, and I'll be using an ASHP. Convention be damned..