dpmiller

the MIs for mine stated to keep it bagged til all building works were complete, anyway.

What did the plans show, and what is your BCO happy with?

standard trench fill for us, blocks on flat up from that, subfloors poured over blinded hardcore *inside* the blockwork. One course of block above that to FFL and TF kit nailed and strapped onto it. Pics in my build thread...

you don't like a bit of heat in your red?

Clive didn't mention any other insulation?

Yes.

AC knows no polarity

is the pin spacing not the same as an ordinary figure-8 plug?

could even go phenolic instead of PIR

who gives a feck what they look like if they save your life?

why not?

Need a trap if you've an LPG cylinder in the vicinity.

so where is it leaking then- the threads on the rad, or the compression fitting on the valve?

surely there's more lieklyhood of the switch being faulty than the lump of plastic? a pair of trim tools or butter knives should ease that bit out and let you see the contacts behind, I'd hope /or replace the bulb with an LED one and ignore the problem...

I had an old bakalite body Antex, a 15 or 17W iron and it was *so* much better then the more modern 25W one that replaced it. I have had a couple of Irodo gas irons and they're great to keep in the toolbag.

for fine temperature control. This is in steam sterilisers, we're switching heating loads of up to 50kW and a failed-short would be seriously bad. But control has to be good enough to not overshoot too... So we have one contactor as a safety device on an independent control, and then actual heater switching is carried out by SSRs or another contactor, depending on brand/model

in the kit I work with, a SSR generally has a series contactor for failsafe isolation

yes, but that's all it is. An opinion.

what woodburner is it that needs a 250mm flue?

remember that with an ASHP you're working with less differential between coil and tank contents which pushes the requirement for a bigger transfer area

my WH cylinder has coils which are 3m2 and 42kW...

what's the spec of the coil? ASHP ones do tend to be bigger I'd be surprised if WB aren't adding a premium to the price too...

as will World Heat.

pass a heat gun or blowtorch over it?

Umm, which country are we in?