Nickfromwales

She’s a keeper. You’ll be so much happier you went with MVHR once you live with it. The cost of running the fan is near to nothing btw, as you’re on trickle most of the time so are using (if thought through properly) less than 50% fan power on average.

Small print is the stuff very few read It’s about changes in what was ok, but isn’t any more etc. Measure twice, cut once.

Indeed. I’d rather take the hit on value than lose GIA. When there’s a distinct lack of wiggle room for going to thicker (or much thicker) superstructures, then airtight + MVHR is the way forward every single time. Airtightness trumps adding slightly thicker insulation, and should be the #1 consideration afaic. Getting the best amount of heat recovery possible is second. When these are in hand, the amount of heat required to keep a happy (comfortable) ambient temp is quite minimal. Then using UFH and a heat pump is a no brainer, in most situations.

Ask OR and they’ll provide the correct stuff for you. No charge in every instance I know of, you just install it from house > boundary and they take it from there. Check the small print regarding where and how you terminate it at the house, as one client has just been told that the Fibre hockey stick and terminal box must be on the outside of the building to prevent issues; eg if a natural gas line leaks and pushes that down the duct and into your home. On one I did in Gravenhill Bicester, serviced by GTC, they were happy to come into the house but they wanted their rigid plastic duct used, all joints photographed and solvent welded (glued like bathroom waste pipe) and then they used a rigid rubber cap to seal the end of the duct to prevent anything getting out of it. Unless the water and electricity companies asked the same, I doubt there’s much value in OR insisting that their duct lives outdoors, just that it is installed correctly using the rigid stuff, and is capped / terminated to create a hermetic seal. They can install that when they’re on site, a-la GTC, so a bit of nonsense imho. Do check though so you don’t get caught out, but if it’s defo got to be an external terminal box, then I’d not want that in sight, so a suitable location needs to be thought through, and then you’d need a duct or a conduit from that point to the router.

Sounds odd on paper, but that looks very nice in real life

Assuming you’re installing the manifold at the same time? If so, then can it be mounted in its final resting place? If not, then I always shutter out a section where the pipes come out of the slab. There was a bit of foam added to the rear of that block of PIR and then the concrete was poured. This allowed some wiggle room when the wall was finally built and the manifold could be attached in its forever position. With those bend ‘formers’ in your link this is more difficult afaic, as the pipes then can’t be manipulated into position before finally back-filling with cementitious SLC. I do the same if the screed / concrete is going down before the manifold goes on. You can cover / sleeve the pipes as above, but not really necessary imho. Doesn’t really add much. The Pert Al pipe can hold up the weight of the manifold more or less by itself, but as per pic1 I installed re-bar and made a cradle just so the concrete guys couldn’t push it over or move it etc during the pour. FWIW, I’ve never had one of these pipes fail, ever, they’re pretty damn tough.

Not all systems are ‘allowed’ to hibernate like that. I know Solarwatt was developed for use in countries with extended periods of near zero solar input, Nordics etc, so were able to do this but also warranties stayed in place. The caveat is, that the system was able to remain in standby and monitor / manage its heath and status, even ‘re-awakening’ sporadically if there were pockets of solar which could be used to top up. Beware just switching a battery system ‘off’ as this may damage the cells, however a lot has changed in the last few years in this market so may / may not still be relevant (modern offerings may now state that they can cope) but the rule of thumb for batteries is largely the same over time; especially with multiples of cells requiring balanced charge (and discharge).

Glad you're in agreement, of its prestigious nature The bastards are climbing in under the cover of darkness, using the webbing under the Severn Bridge as their cradle to the next level. I'm driving over it in the opposite direction hoping to get a better wage. Que sera!

Let your fingers do the walking?

Depends on who's wearing the Principal Designer hat? How could you think there was £8k of meat to shave of this role???

Perhaps the OP could approach the SE to ask what would mitigate against their objections, and weigh up the effort vs rewards.

Cover the expensive membrane with cheap visqueen and dispose of it later. Zero UV getting through that.

And he comes from a very prestige part of the country too.

I use CVC Systems in Oxford for all my clients builds where I’m in control of the M&E. Had some great results, lots of support for design and spec of kit, and very good after sales service too. PM me if you need contact details of who to speak to.

Just make it as least wind-resisting as possible if it’s going to get blown on.

Hope it’s an EV….

The seals on their French doors were a bit shite, but by and large the client seemed happy with them. The handle for the slider, vs where the lock was, was a bit poorly thought out and if the key was left in it it was a bit of a conflict. That was 2023, so things may have improved. 🤷‍♂️. Rationale are quite good units, very robust, and the least of the bank-breakers, but for one client their sliding door options wasn’t the best so we went to Velfac for the 4.9m 3-panels slider. Not the nicest of mechanisms imho, but the lady of the house could operate it independently so all good I guess.

If it gets to that low a recovery temp, the cylinder stat is on the floor and the cylinder is sat on it?

Increases the rate that you consume deodorant though..........

Lol, ok, but you're supposed to tell us that nugget at the beginning

Thanks. Appreciated.

Won't scratch the surface of all the places you don't even know you have air leaking out of. Use the force.

Don't they still have / utilise 'exchanges' for fibre? Surely it's not direct from source?

Arise...........you are worthy.

Good man. Have you considered AeroBarrier to get you to <0.6ACH? One we just had done started out at 1.2 ACH and a few hours later was sub 0.2.