dpmiller

or maybe they were the frameless Lumi from Apeer?

Dual elements would be a bonus here.

got a wavy knife blade for the jigsaw, like a knife through butter and no dust.

Absolutely. But it's on a very long finger for now, getting the insides done is no.1.

Guttering complete, scaffolding away, MVHR complete. photos!

you could try sending the details to these guys: https://www.undercontrol.co.uk/heating-elements/cartridge-heaters/ they generally know their stuff...

well in that case we must have a 1.66 storey- the bedroom wings have full floor area but the bathroom has a deep storage void to the eaves each side of a dormer...

tripped over this ebay listing: https://www.ebay.co.uk/itm/Thermal-Stores-Solar-Thermal-to-support-Space-Heating-as-installed-in-my-house/223567645425?hash=item340dab8af1:g:nskAAOSwz1Rc1EgV and wondered whether we have/ should have heard of this Eric Hawkins and how much of the blurb is without doubt?

there's already this for a start? https://www.ebay.co.uk/itm/Solar-Immersion-Diverter-PCB-3-phase-Arduino/123811780800?hash=item1cd3c1d8c0:g:bsAAAOSwjOxavhmH

wasn't there something wrong with the way the house was set up tho?

I'd opine that the stuff that's really "pollution" will whizz straight through anything up to a classical HEPA filter.

because it's not heat, it's quantity of stored energy.

which system are they quoting? Standard/ultima/tek?

don't you feel responsible?

Yes. Two hours wasn't long enough... When you turned the heating ON the room was either too hot or too cold. Ergo no heat or lots of, in the rad. If you'd left the heating on for longer (and also assuming the rads were all set up with the correct Delta T via the lockshield, as should've been the case but probably wasn't...) then as the room approached the setpoint of the TRV flow would have reduce and thus the Delta T across the rad. The adjustment of a TRV to set room temperature is pretty subtle.

As I previously said, the *STAT* is a wax or oil powered analogue device and does NOT slam open and closed as you describe.

No, a TRV is liquid or wax filled just like the thermostat in a car.

you do realise the TRVs aren't binary but modulate flow and thus rad temp?

Problem?

There's a lot to be said for the Solartwin- style system. Freeze-tolerant but can be setup to drain back, boil-on-stagnation tolerant too.

thought so. External walls are battened out also so they'll need it too. Ho-hum.

Yup, studs up as part of TF kit.

chasing some thoughts on this please @PeterW @nod?

Renusol ground-mount PV housings https://www.ebay.co.uk/itm/Renusol-Console-buckets-for-roof-ground-mounted-solar-panels/133060479570?_trkparms=aid%3D1110001%26algo%3DSPLICE.SIM%26ao%3D1%26asc%3D20131231084308%26meid%3Dc0c45acb5dca4d568f8639a017eaab60%26pid%3D100010%26rk%3D2%26rkt%3D12%26sd%3D183535318359%26itm%3D133060479570&_trksid=p2047675.c100010.m2109

presuming it's not an electronic switch of some kind (Hall or somesuch) I'd say your reed switch is failing. You could try "cleaning" the contacts by applying a higher-current load, or trying them in a DC circuit.