markocosic

Evacuation back into outdoor unit and nitrogen purge and vacuum out and refilling indoor unit required. A lot of faff to avoid an aerosol tin of propane leaking outdoors. And no filter drier to catch any ick if you do introduce this by brazing. I'd ignore it if you're trunking it anyway. Perhaps braze the next one end to end and clad over it though! Or say fuggit and flare indoors even though it's R290. (probably be legal by then - the EU is busy upping the allowance for how much R190 can be in splits etc at the moment)

The conveyancing involves sweet fanny adams if it's a registered freehold title. Worth not relying on the bank's own conveyancers; as they have, without fail, been woefully inept on every mortgage transaction I've ever been involved in. Do it yourself. If they won't deal with you then find somebody clueless but cheap who will do Simon says conveyancing. (doing it yourself and having them sign it afterwards) This may well be the bank's inept conveyancers - provided that they don't have room to screw up your plans by doing things wrong.

Ah, propane! In which case braze the lot bar the joint at the outdoor unit 🙂

IMO don't install that way rather than trying to make midpipe joints serviceable: - Route pipework for indoor unit such that the flares are indoors behind the unit. (there's space for this designed in) - Buy longer linesets when installing or have the installer braze them. - Use a leak detector when installing (heated diode units are about £50-75 and sensitive down to 3grams/year)

Neatest? Hide them behind the cladding. Easiest after the fact? Black air conditioning trunking. Comes in to halves. Clips together. Ends and bends etc all available.

I set fire to a dark towel over the back of a chair placed over a metre from the fire when using it for the first time. Sub 200C double walled convection stove it might be. Doesn't prevent numpty from lighting it up, arranging their wedding shoes and towel a comfortable distance from it at startup temperatures, then coming back 15 minutes later to a secondary fire from the radiant heat!

Agree that it's upfront easy. It's just efficiency ugly is all.

You build traditional balkan houses. Ground floor? Where you overnight then pigs/cows/sheep in winter. First floor? Where you overnight then humans for most of the winter. The solution need not be sophisticated. You have more choices in the UK though. There isn't a real winter. There are plenty of economic opportunities should you choose to follow these rather than following passions.

Not buying it as the 'ultimate' option. Spark ignition CHP running on methane from the cow shed / naerobic digestion plant plus syngas from wood gasification. LPG as your easily stored "pilot light" fuel for starting it up. PV for offsetting demand for fuel entirely. Screw *buying* in diesel. Cheating; more reliant on others outside your borders; easier to pinch in bulk than slurry/wood/LPG?

But oh so easy and inefficient! 😉

Convert a Prius to LPG. Locate engine etc in the garage for waste heat capture from block. Plate heater exchanger into an LTHW buffer vessel for high grade heat to house/hot water. Electricity to keep the lights on/fridge on/internets happy. And run a heat pump if you need more heat than electricity. Offset your LPG using bucket loads of PV with an island capable inverter and battery combo. Gasify wood and blend that with the vapourised LPG for extra style points. Interlink the Prius battery/PV inverter battery for extra style points. How can we make this more complicated?

Stretchy flue rated silicone seals is what you're after. For roof membrane: https://dumtakis.lt/manzetai-membranos-dumtraukio-prasiskverbimui/947-dumtraukio-manzetas-rgd180.html#/394-stogo_kampas_laipsniais-diapazonas_0_45_ For inner airtightness membrane: https://dumtakis.lt/sandarinimo-detales/356-dumtraukio-prasiskverbimo-manzetas.html Cut your standard membrane back leaving e.g. 10 cm gap to flue. Slide the silicone job over. Tape the silicone job to your standard membrane. My 'membrane' is OSB. A section of this was replaced with cement board that stops 10 mm short of the flue. This 10 mm gap was flexible sealant-ed (1500C rated) in place. Purpose: no thank you to mice indoors. They apparently do like a cosy flue in winter. The silicone seal is then inboard of this and taped to the OSB at its edges. A belt and braces ring of 1500C sealant 'glues' the silicone to the flue so it's not just relying on stretching to seal. Cut the flammable cladding back 8 cm around the flue (or whatever the rating is) Theres then a split metal trim ring to bridge the hap/hide the mess. Windows leak more than the flue. (all the corner welds of the uPVC)

Screws for OSB IMO. Nails want 1/3rd and 2/3rd to stand a chance of pulling anything tight..1/3rd through the thing being fixed. 2/3rds into the thing that you're fixing to. You don't have that putting battens onto OSB. They won't be pulled tight to the OSB. They won't offer much uplift resistance. Screws on the other hand don't "waste" energy going through the thing you're attaching (they have a plain "neck" that slides loosely through the hole) and do all their fixing on the threads. Say 5*50 mm with 30 mm of thread and 20 mm of shank (neck) for a 38*19 batten to OSB. Perhaps 5*60 mm if the "drilling" tip is particularly long. Else tack the batten on with nails for speed, then screw through counter battens AND battens AND the OSB with something like 5*80mm screws. C3 rated for corrosion is ok. Stainless screws are not as strong as coated steel screws.

Common in Lithuania for what it's worth. Not butyl tape, but a thin later of sticky back foam on the battens holding down membranes. Easier than aiming for a blob of sealant with the screw/nail. Airtightness testing of all new builds is a thing for building regs signoff though. It also helps mitigate roof rain noise when using (common here) metal roofing.

I'd do both. Avoids air going through SIP joints if there a compromise in the VCL. It isn't that much tape in the grand scheme of things.