dpmiller

stealthy flow restrictor time @ProDave?

I've just poured thinscreed over a FF pipe loop on our build, I've put UFH in the bathroom and ensuite for comfort but the loop also covers the open plan landing/balcony.

Speed of response may well be a positive as well as a negative. Certainly, the supplier of our product thinks so https://www.rtu.co.uk/assets/documents/Ultraflo-Heat-Response-Study-by-UU_180208_142848.pdf

I dunno, 12 tonnes of anything takes a wee while to heat up or cool down.

50mm is fine for many poured screeds, the one we chose requires a minimum 25mm over pipes.

only a small proprtion of the flow will manage to make it up the small pipe.

that sounds useful @PeterW . I didn't think 1/2" at 400mms would want to move too much. @Onoff I'll be filleting the larger gaps but would worry about foam tearing the AT membrane over time as it moves around in the wind. The metallised layer is the AT, and I've noticed that the Sicrall is sticky enough to delaminate the membrane...

that's pretty white!

So I need to batten over our inner insulation layer on the slopes. External walls are already done as part of the TF contract. The ceilings won't be battened, we're using 1/2"TE, and all studwork and the roof are at 400ctrs. Do I need to batten horizontally top and bottom? If so i guess we'd be about 100mm in from the insulation edge to screw firnly through, yes? Or at 400ctrs is battening on the rafters enough? ta.

Yup. Spent too long fitting extra relays to Microflows to signal fan on, back in the day. And that was when they had the Mk1 auto speed control which used a resistor/thermistor pair for feedback & isolation. SLOOOWWW response...

I hope you have more success on the BMS side than some of the lab suites I've been in. Inputs vs feedback vs actual stable control is one heck of a black art...

built-in humidity sensor in our Vent Axia works remarkably well

We did things completely differently. We trawled online "book plan" services (there are at least three big ones over here), found a design that was attractive to us and then via phone and email discussed changes to the design to suit our needs. Ended up being a full redraw, and our guy was absolutely superb.

so you don't have any data?

how do you know that 2ft diameter is overkill but yet 1.5ft is "too slim"?

Is it OK to use EPS rather than PIR to insulate the reveal?

Weird. my 2-storey, 270sqm build only uses 140mm frames. will my house fall down?

standard black stuff. Concentric in our case.

our DNO (NIE) mandates a red hockeystick, and most of the cabling on rural sites is direct buried.

what about going top hung then, don't they generally have the usual top bar to vent and rotate as well as a lever handle at the bottom for top-hinged function.

https://www.keyliteroofwindows.com/shop/centre-pivot-04-780x980mm/

well at some point, this will then likely need input from a structural engineer surely?

is the TF being stickbuilt on site or is there a spec to go to a factory?

they do white wood too.

non-woven mat (as used in spray booths as paint catcher, and prefilters in fumecupboards etc, costs next-to-nothing and can even be washed if you're gentle. Basically the same stuff used in the MVHR units anyway...