dpmiller

the thermal shutoff valve, in your diagram. And does the fan coil unit have a shutoff valve inside it?

you're not using the microswitch atop the zone valve to control the pump?

more insulation above the ceiling.

isn't it true that the hemihydrate screeds don't suffer from laitance issues?

CPC have a massive range of this stuff, modular and assembled. this one doesn't have a phone sockethttp://cpc.farnell.com/global-communications/mswp/global-multi-service-wall-plate/dp/SE00284 and if you splash for a Loftbox or similar then all the multiplexing and sharing is done in one go. http://cpc.farnell.com/global-communications/loftbox-8-g/tvlink-8way-loftbox-psu/dp/SE00366?ost=loftbox&iscrfnonsku=false&ddkey=http%3Aen-CPC%2FCPC_United_Kingdom%2Fsearch

Land liability only for us, just yet.

tend to be a buck converter.

battery as in a series/ number of elements

Bought one of those 12v packs as a spare for my collated screwdriver. Admittedly I paid the princely sum of £7.99 but that got it to me in a couple of days from a UK vendor. Arrived darned-near fully charged.

Woo-hoo we own a field! our private laneway how the site looks now the view "from the front door" field drain. Note that the fence isn't the boundary here, rather the centre of the drain.

Rolled road planings maybe?

there are a number of them.

given that heat tends to rise is it maybe risky to assume that added heat within the room (bodies, appliances whatever) is going to start moving into the slab in a reasonable timeframe?

sadly it aint that simple with Royal Mail- business contracts can choose to include H&I or not and outside their contract charges get silly, apparently.

Pretty sure a car MAF sensor as mentioned by @SteamyTea will be faster still, I believe they can now see indivudual cylinder pulses. Many are now thin film rather than wire.

given the price these days (cpc are doing 600x600 40w for £22.50 plus vat) would it not be as handy just to buy office panels?

I've been thinking the same- a vent with a drop flap behind the cooker would be closed in normal conditions (mvhr positive pressure) but would open if the extractor was on or if a woodburner pulled too hard with it's door open.

Grant used to have a special probe for ambient air and coldrooms for the Squirrel datalogger which was basically a thermistor inside a ping-pong ball.

car thermometers have massive amounts of processing, to attempt to negate heat rising from the road surface . The thermistors used actually have a pretty good response so you might try tapping into the signal at the current one using a nice high-impedance ADC.

I can't be having tape on fresh compression fittings. If the nut is tight enough to have properly compressed the olive, any tape will have been sheared out of the contact area but if it hasn't it leaves a nice slippery surface. There's one particular brand of Autoclave I do a lot with and they tape every joint in the factory. By the time the instrument arrives here many fittings are so loose I can snug them by hand. I do like Slic-tite paste tho- sticks like sh*t to a blanket on any surface, fills gaps well, and lubricates also. In normal use it's non-setting but I had opportunity to open a joint on a steam generator that I'd made a few months previously (sustained 145c) and it had dried out a bit like glazing putty.

not enough to autoclave them Jeremy?

School's a nice short walk for us- about a quarter mile- and I enjoy being one of the few parents there every mornng (business trips excepted) as at P6 most of the kids are just dumped off.

https://www.bes.co.uk/manthorpe-radiator-pipe-guide-seal-concealed-twin-exit

fixed IPs or auto?

depending on the sensor, a series or parallel resistor might be useful here.