dpmiller

Oddly enough we had the opposite experience. We're in a Project Stratum area, with service provided by Fibrus. Theoretically at least. Our house didn't exist during the Stratum survey, and so does't attract a grant payment for Fibrus. "Sorry sir, you're property isn't included" A chap from OR came out (chargeable survey, but they didn't tell me that to begin with...) and said "what's the problem? We've a fibre node on the next lane" and poles from there carrying a copper line to our neighbours. He explained that they would bring an 8-fibre bundle 200m in on the existing poles to cover the four houses in our little clump and call it "network expansion". Good value apparently. And so fibre arrived to the pole, I buried the ducting OR delivered to me, and the installer happily brought the fibre in, through my internal conduit, and put the ONT in my chosen position in the plant room. /subsequently, the three other houses all got Fibrus, and Fibrus have pulled three seperate fibres, all from a second node point on the same pole on the other lane.

2 ducts to 1 plenum.

so is it likely your spray lubricant has swollen the rubber?

just like they use in chippys then?

CoolEnergy units modulate on DHW both by power and pump speed, and can do WC on DHW also

has the system been correctly commissioned and balanced?

you say that, but is it true?

Good Q. The inlet pipe is plumbed right to the bottom on these and there's only a small overflow hole toward the top of the sampling pot. We had an issue with the pump last year which had it out of action for a week or so. At no stage, running or not, have I ever seen any floating scum layer. I've been advised by the reps of two different distributors that even a couple of weeks without power won't affect the output quality of a mature plant noticeably

you'd need to have a problem for quite a long time as there's 400mm or more between the normal level it pumps out down to, and the "overflow" height.

Correct. It's an SBR- Sequencing Batch Reactor. It goes through a run of aeration and settling cycles before a final settle and pump out.

in our case the Solido airlifts well above the outlet, into the sampling pot, and this then overflows to the outlet

some TPs have a sampling point built in

Hello. near neighbour...

exactly what kind of breaker tripped in the CU?, was it an MCB? RCBO?

what is the actual thermal quality of the TLA and does it need to be topped with a screed anyway?

some systems just display the "programmed" fan speed whereas some can I believe alter the fan speed to keep airflow constant as filter restriction rises. Seing a marked change in fan speed would hint at the filter being blocked in this case.

is there any pressure-drop or flow monitoring on your unit? Is fan speed under closed-loop cantrol?

Yes, an extractor to the outside. It's through a gravity flap which has a rubber seal on and is pretty airtight, certainly not entertaining any backflow. It will very rarely (depending on wind direction) flap open briefly on very heavy gusts and so I've considered going to a motorised damper, but it's just not bad enough to really worry about...

you're not helping us help you here...

Bog-standard (but powerful) extractor, and MVHR extract point over the sink but near the cooker. Normal steamy cooking is dealt with just fine by the MVHR, but on the occasions that I want to fry or stirfry I whack on the big fan. Ensures the oils aren't heading into the ducts, and I really don't care if flow is unbalanced for half an hour every now and then...

push down harder until it clicks locked?

But can we be sure whether the error happens at other times or not?

soot and ash are very different things... Soot means you're not really getting the fire hot enough, generally. / our Bronpi stove- if you're not careful- can have ash make it's way into the external air pipe underneath the unit if you aren't gentle with the ashpan. But there's no sign of any of that, even light fly-ash, making it's way upwards into the secondary and tertiary circuits.

other than a very occasional Aga, I don't think I've ever seen an indoor oil boiler this side of the wee pond

If funds are really tight and you can put up with the difference in insulation value, try 100 PIR over 50 EPS. The EPS is a bit more forgiving of the subfloor too...