Alan Ambrose

>>> Which brand do you recommend for this That bright green stuff in the image is Ubbink.

Those all sound very reasonable given the kit and skill involved.

@zzPaulzz - sorry I forgot to answer your question. I use a co called Alco Eng https://alcoengineering.co.uk for laser and bending sheet, usually stainless. And purpose powder coating https://www.purposepowdercoatings.com . But that’s largely out of habit and knowing they’ll deal with small (rather than industrial) quantities. I generally supply a design in pdf and dxf allowing for the bending characteristics, but I think Alco will do that bit too for a fee. I’m sure there are loads of other good companies too.

That graph is for the US?

>>> Seems a shame there isn't a way to run wet underfloor heating in a way that would cool the floors ? There’s lots of info here on ‘t ‘ub on running heat pumps in cooling mode. Some do it out of the box, some can be configured, some can’t.

ah thanks

It's a moral failing. Someone at the council thought 'should we try and hoodwink £70K out of a council-tax-paying 'customer' for making a paperwork mistake?'. And the answer came back: 'yes, let's try it on'. And yes, Feynman was a legend.

Nice, thanks. Assume they worked OK?

Anyone have some ballpark costs for core drilling? In particular, some 150mm holes for MVHR ducts through a 365mm RC wall?

... and which ones did you use?

>>> 3mm is 2 credit cards. Or, in imperial, about 5 miles if you have OCD. Or as I call it 'attention to detail' 😄 .

If I've understood you correctly - any chance of shaving the 3mm off the back of the tray instead?

Thanks Tom, very useful info.

As other here on BH have noted though - we British have a generalised rose-tinted view of 'German engineering'. Some of it is justified, some of it is definitely not. The German wife of a friend (they live in Berlin) tells me that the red tape in local government is outrageous and the amount of pen and paper and fax machine usage is regrettable.

There's nothing like a government-mandated monopoly owned by a hedge fund is there? There's a few of these around.