dpmiller

careful nothing falls into that open manhole, it'd be a b*gger to get back out again as you can't climb in without removing all the airlift gubbins that's bolted in...

drill it through but have one of these? https://www.celticwater.co.uk/leaf-catcher-downpipe-leaf-trap/ or https://www.celticwater.co.uk/leaf-separator-compact/

We were/ are in the same situation Ian- bordering the 1% and 5% lines. Local BC made no requirement so we chose to just go with membrane- if anything *does* rise and escape it'll get blown away

What is the level of radon risk locally- do you actually need a vent or is a barrier actually sufficient?

am I the only person that downloads and reads manuals while doing due diligence prior to purchase?

where is the massive expense in MVHR? Or have you not put ducting in already at this point? If you've built airtight enough I wouldn't be so sure just having a window open will actually give you the ventilation you require; gotta have crossflow and then you're into draughts...

cheap mains (or vibration sensing) hour counter? Does it actually need to be logging or just a totaliser?

Looks like it's the manager that get's trained, not the tester? "A DVSA approved MOT Managers course that covers testing responsibilities, administrative arrangements, quality systems, disciplinary and appeal processes must be attended for each AE by: An AE Principal for the AE The AE Designated Manager for that AE "

But in GB, the mechanic that does your MoT isn't special or different, and how often is his work inspected by VOSA or whoever?

you can extend drain hoses, and buy longer water hoses if necessary.

300l tank, filled to (IIRC) 270 to the expansion volume. It's a Worldheat cylinder 2050h x 550dia Both the DHW and recovery coils are 3m2 corrugated tube ASHP is a CoolEnergy IVT9. I have it configured to control on return temps and deltaT is 7C, and the circulating pump is under PWM control Heatup and UFH are mainly carried out during the E7 period. First the UFH as necessary, then the TS is boosted to 54C +0.5C (the IVT allows a variable overshoot to stop the compressor from doing a hard stop) just before morning showers . Cylinder hysteresis is -1.5C to cut in. Daytime recovery temperature for the cylinder is 52C + 0.5C CH return temp is 42C so flow can be briefly in the 49C region. The works well as we have some rads and towel rails upstairs and these get to the flow temp before the system trims back. the UFH sips from this and is blended to 32C or so. It's worth noting that as the cylinder sensor is halfway down the cylinder- midway between the coils- and the flow temp to achieve the required 54C is a bit higher, the tank seems to end up being around 57C at the top, 55C at the sensor, and never lower than about 37C right at the bottom underneath the coil

Well I did it, and it works. Stores enough heat that the ASHP can start up and start recovering *before* temperature changes are noticeable at the tap. Whilst the COP mightn't be brill, it's a darned sight better than an electric shower. Recovery to setpoint gives a "burn time" of about 30mins after a -wifey's long hair approved- 15min shower. Tank sensor is halfway up and the tank is heated to 54C, the outlet tempering valve is around 48c. CH/UFH flow passes through the coil at all times so the stratification is somewhat reduced, the bottom of the tank tends not to drop below 40C during the heating season Additionally we've two immersions on PV- top to 65C, then bottom to 90C if and when there's plenty of sun, lol And a boiler stove can heat the vessel through a Laddomat I prefer to look at it as a "summing point" as all energy in or out of the system passes through the TS

^ yep. The error on the smaller vane units is massive, even before you put a hood on them. Back when I was doing this daily, only Airflow Developments EDRA/ RVT vanes would cut the mustard and nothing hot-wire under £2k was worth looking at. Until... Testo brought out the 405.

It's just a capacitor... something like https://www.ebay.co.uk/itm/233626672751 and choose 16uf

I reckon we're all a bit spoilt these days ref. showers. Our first one was 4.5kW and do you know what? It worked...

then add a drain HE too

Yep, the Heatstream is just a TS. I was aiming for one prior to Harlequin pulling them off retail sale, and had our TS configured in a similar fashion. The Heatstream looks busy on top because it's got the mixing valve and a filling loop all up there. It's manual-fill-to-overflowing, with an air gap above, and a nifty wee float indicator for the level. Plus a possible 3rd coil for an additional heat source. Bear in mind, all you that poo-poo the lack of stored volume of the HS or other thermal store, that here in NI a small cylinder with a Willis is absolutely the norm and people are used to the concept of charging and re-charging a cylinder with heat. A 6-9kW HP can do much more than a 3kW Willis Copper Industries also approximated the idea in their Maxi-Pod tank

I wouldn't be surprised if tarmac was actually the dearer option, these days...

our aico smokes are on a relay box that I've configured to kill the MVHR (and bring on escape lights) on sensing smoke, whilst putting the system into boost in case of CO alarm. Yes, getting out is no1, but aving fabric and recovering is important too...

double post soz

It's a TS. 3m2 HP coil at the bottom, 3m2 DHW coil at the top. There's a fair degree of stratification, I've considered a destratification pump to increase the stored energy but have never encountered a situation where it was truly necessary. I also route the UFH flow through the coil so the tank is never cold and we have some buffer volume

A 9kW HP with a setpoint of 54c running into a smallish (250-is active) TS with a 3m2 coil, hasn't yet run out of hot water for us.

there are technologies in vehicles and in industry to deal with NOx

have they been rained on yet?

so who measured/ supplied/ installed the glass?