Temp

https://www.ebmpapst.co.uk/en/contact/ebmpapst_uk/spares_replacements/spares_replacements.html

+1 Papst have been making fans for decades. They appear to have a near match on their website here but the last digits of the part number are different. That could be a problem or it could just be a version number. https://www.ebmpapst.co.uk/en/products/axialfans/axialfansdetail.php?pID=132250 I suggest getting your engineer chap to give them a call to ask if its a replacement or what the differences are.

How do they know when to defrost?

I think you may need a wider door. The regs specify a "clear opening width" not the width of the door. When a door can only open 90 degrees the door itself obstructs the opening reducing it by the thickness of the door and sometimes by another 10mm or so. If you specify a room width of 760mm that only gives the builders 10mm for errors, plastering, tiles? Id be inclined to allow a bit more.

Welcome, One of my sons did briefly flirt with the idea of doing an Architecture degree and one of the courses offered had a specialty in off site manufacturing, however he eventually decided to do Materials Science instead. Would be interested to know why you think the big house builders in the UK haven't really adopted off site manufacturing in a big way? It is a mortgage issue?

Google just found this.. https://www.theheatxchange.co.uk/potterton-fan-motor-blade-l-20m-on-arg-pot1753260 Pretty sure Potterton = Dimplex and they claim its "in stock" on their web page. Best double check that.

If you cant get one from Dimplex pester them to see if you can get any kind of specification for it. There are loads of fans and motors out there that could do the job but you will need more technical info than just their part number to select right one. Some things can be measured like the dimensions and operating voltage but others like the air flow rate are harder.

CE is being replaced by UKCA at some point. Think it stands for "United Kingdom Can't Agree" or something like that. Was story in the paper recently about a small toy company that makes 39 products and has been told UKCA marking will cost £500 each.

+1 dead handy for all sorts of things.

Yes, you can also put the cable in the duct while its lying on the ground nice and straight. Just make sure you have enough out each end. In my area duct comes with a thin string in it. Use it to pull a proper 8-10mm thick draw rope.

Sadly we're no longer in the EU.. https://www.boredpanda.com/eu-recognize-right-to-repair/?utm_source=google&utm_medium=organic&utm_campaign=organic "EU Passes Regulations Forcing Manufacturers To Have Spare Parts Available For 7–10 Years After Product Purchase"

Can you see any make or part numbers on the body of the motor? While its still sort of working might be worth trying to measure.. How many wires? Voltage? Current/power? RPM?

This looks like the motor and fan but Ouch.. £460.. https://www.dimplex.co.uk/product/fan-60mm-motor-blade-l-20m https://www.showerdoc.com/dimplex-fan-motor-and-bl-1753260 Think I'd be taking it apart and replacing bearings and possibly brushes if it has any (probably not). Edit: I see you already asked them.

Bit of oil? Change motor start capacitor?

Make sure you tell them you are importing for personal use not trade.

They probably already have one. Both companies (the one exporting from the EU and the one importing into the UK) need one.

In Sweeden... https://www.tullverket.se/eng/business/eorieconomicoperatorregistrationandidentification/whichoperatorsneedaneorinumber.4.7df61c5915510cfe9e760b8.html

From what I can see you only need an EORI number if you are importing for commercial or trading purposes. https://parcelbroker.co.uk/help/what-is-an-eori-number/ Are There Any Exceptions? Yes. Very infrequent traders are not required to have an EORI number. HMRC are not interested in those simply selling a few personal possessions every once in a while or indeed those just shipping some personal belongings. However if you are shipping goods on a regular basis with the aim of turning a profit, HMRC will likely consider you to be trading for commercial purposes and will require you to register for an EORI number.

I'd be surprised if a private importer needs an EORI number but personal imports come way down the government's Brexit priority list so who knows. As I posted elsewhere.. Items over £135 should be sent free of EU VAT. UK VAT and a handling fee should/will be charged when it arrives in the UK. Items under £135, the seller should collect UK VAT and remit this to HMRC. A process that requires them to register with HMRC.

Could be a balancing issue if the problem rooms are the longest loops.

Define cold? What actual temperature?

House prices have continued to rise through 2020. https://moneyweek.com/investments/property/house-prices/602540/will-britains-2020-house-price-boom-continue-in-2021 We sold a flat in October this year and it went for more than the asking price. I think lenders are worried about the year ahead and might be covering their backsides.

Not sure how you can easily put one above the insulation (on a conversion I mean). https://www.nicholsonsts.com/news/blog-dont-get-caught-out-ignoring-vapour-control-layer#:~:text=Be it a cold or,structure and causing interstitial condensation.

Ok so that construction is normally ventilated using vents in the eaves. Air goes in one side, across the "loft" just above the insulation, and out the vents on the other side. Yes if you are retaining the impermeable membrane on one side I would retain vents on both sides. I used Protect VP400 (Dark blue color) on an out building about 8 years ago. Think I got it from Screwfix. Seemed strong and survived exposed for many months. Used it both under tiles and behind timber cladding.