dpmiller

as each size of unit likely uses a different motor, and multiple motors may have been used over years of production, inspection is best policy. Probably 2 in each motor tho...

is the house so airtight and running at positive pressure that the only source of a smell can be the MVHR?

Atkinson cycle needs consideration

^ back entry gully trap for the win.

as it's also connected to the tundish for the hot tank, it must be trapped elsewhere already?

that's just paint over the welded joint and you should be able to get a match to touch it in

this is their coloured stuff https://hueasphalt.com/

Collen Bros are the guys for coloured asphalt locally, AFAIK?

Drill the guts out of the old stumps, then plane new posts to be a resonable fit in the holes and beat them in. BTDT...

OK so your second picture shows the internal wiring of the motor and it's encoder I think. They just need swapping over for L vs R travel. so that's mains supply, then 5-core to the photocell 2-core to the closed limit 2- core to the lamp (these look like they're all SELV) and coax to the antenna

I put a Grundfos Scala on a job recently (ring main for a DI water system) and it's remarkably good at modulating it's speed and will shut off completely if dead-headed. Previously the customer had a single speed Grundfos boost pump and the reduction in waste energy shows in the holding tank (270l or so) being about 15 degrees cooler than previous...

that drawing A is a bit confusing, there's a bit more cabling there than it looks. We'd really need the whole book to see exactly what's going on re sensor placement and such \colours aren't that relevant but it looks like those 4 also need an earth so depending on how you're installing the cable that could be either an ordinary 5-core flex or something like a SY or YY control cable.

what is holding the joists up currently?

aren't batteries in the loft frowned upon too?

looks like the door is sitting across a cavity closer to me?

Does your neighbour own his land/ what rights does he have to it?

on our keylites there's a manual emergency release that disconnects the drive chain from the manual bar, are the Integras similar?

week 48, 2009?

Dave the manual refers to a check valve being in/under the blue inlet fitting, try there...

yep look in the brass fitting. bit of grit under the rubber disc maybe

no, not under the tray. from the wall onto the tray...

What tanking system are you using and how does it attach to the tray? That might answer your Q...

it's like a dimmer switch. it turns the heat up and down and so you will see the voltage vary, yes.

both panel and bracket being screwed through multipanel won't be helping

the top bar would've been better bracing across onto the wall at the window