marshian

On the run time - it's basically set to when we aren't home or are asleep Power consumption is 9W when running so from memory I must have set it on either 3 or maybe 4 out of the 6 settings - It's been a long time since I changed the speed Claimed air volume on each of the power settings is Setting Litres/sec Litres/min Litres/Hr Hrs for 1 AC 1 10 600 36000 8.08 2 20 1200 72000 4.04 3 30 1800 108000 2.69 4 40 2400 144000 2.02 5 50 3000 180000 1.62 6 60 3600 216000 1.35 The Hrs for 1 AC (OK I know it's not going to drive all the air out there is going to be some mixing) are what I calculated based on volume of the house.

Very useful thank you - I know for my Sonoff Temp sensors I can change the offset value in the app - I've had a look in the app and I can change humidity offset too so looks like a calibration is on the cards for this weekend

Ahh be interesting to know how to do that for the Sonoff units I have - 6 % difference is significant

Great data I was worried about mine (lounge) being in the high 50's to low 60's......... No trickle vents and very little air ingress (due to insulating under the floor) and Patio doors are rarely opened (due to spiders apparently) PIV unit runs 12.5/24 hrs and certainly lowered the overall humidity

Nice work I'd better add a bit more info We have a PIV unit installed - takes air from the loft and pushes it into the house - it's not MVHR but it solved the issue when I insulated under the ground floor and humidity levels spiked due to the reduction in drafts. It cuts off at anything above 25 deg in the loft (so summer during the daytime it's mostly off) It does a fairly good job run (08:30 to 15:00 provided the loft temps don't turn it off early) and 00:00 to 06:00 overnight when we are the main drivers for humidity (Sleeping) I've never calibrated the Humidity and Temp Sensors but from a temp perspective they are pretty damn close to other devices reporting temps so I'm comfortable with trusting the info What I would say is that all my humidity readings I feel are on the high side and I'd like them to be lower but when we ventilate the house on good dry and sunny days the readings go a lot lower into the low 40's (much lower than the loft!!!) Last thing the room with the sensor is heated in winter but on a set back temp to the rest of the house as it's north facing - has three external walls and loses a shit load of temp very easily (last winter it also had a large area off loft insulation missing) - If I'm in that room working on my PC it heats up quite quickly

As I said earlier I've been logging for a while My External Sensor (Tempo and Humidity) is actually in a well ventilated loft My Internal Sensor (Temp and Humidity is in one of the bedroom) Hopefully this table will work OK Month Avg External Temp Avg External Humidity Avg Internal Temp Avg Internal Humidity Aug-23 20 62% 23 60% Sep-23 20 68% 22 64% Oct-23 15 80% 19 67% Nov-23 9 89% 13 73% Dec-23 10 91% 15 69% Jan-24 8 86% 14 64% Feb-24 11 86% 15 67% Mar-24 12 79% 16 66% Apr-24 13 70% 17 63% May-24 18 66% 20 65% Jun-24 19 58% 21 59% Jul-24 20 61% 23 59% Aug-24 21 57% 24 56% Sep-24 18 70% 21 64% Interested in Mike's xls sheet I plugged this years data into it

I know it's an old thread - but I got a very good measurement of my heating circuit by reading the water meter before a refill after a drain down (I subtracted the volume of the header tank

Not wanting to take this thread off topic perhaps I should start new thread 😉 It's 5.4 Litres of hand built V8 - made a bit nuttier by AMG - then thrown in a car with a short wheelbase and not enough room in the arches for a more suitable width rubber so anything more than a moderate throttle lights the tyres up. 🤣

Luckily we have a fairly good one at my workplace and I've got permission to borrow it this winter - seems a bit pointless to look at much at this time of year - you really want to use one when the house is up to temp and it's cold outside to show the biggest leakages (IMO - happy to be shown to be wrong)

Amen Brother Stupid V8 in a silly car = Lots of fun

Pleasantly surprised lots of normal GD "stuff" was missing Zara didn't get pregnant You didn't got over budget but came under (OK not quite finished but close enough) The house was "finished" before target time The garden wasn't finished but the bones are there. I amazed GD didn't can the programme due to not enough drama 😉 I guess the look of the house and the corten provided that...... Well done

You are taking what I said out of context - yesterday "specifically" the boiler wouldn't work (so WC wouldn't work too) with all the TRV heads removed (I tried that in case it was a flow issue)

I was intending if it all works as it should to just use the decorators caps - she turns those it turns the rad off

WC comp wouldn’t work with all the TRV heads removed 😉 It was heating water to weather comp 37 deg Seriously it’s not a Wiser issue the boiler doesn’t know whats going on outside it’s flow and return temp and the volume of water passing thro it - sure TRV’s of any type (smart or dumb) can influence all of those things but so can balancing and pump speeds There is no link between Wiser and the boiler other than a call for heat (either for HW or CH and currently the boiler doesn’t even know that as the HW demand box has been disabled as well as WC) I’m sure it’ll get resolved fairly quickly because I’m not paying the bloody bill until it is 🙂

And it is something I will seriously consider (save me a few quid in batteries every year and stops SWIMBO winding up the TRV’s cos the radiator isn’t hot enough)

Do people not read posts WC is turned off because it’s not working when it is I may well ditch Wiser altogether 😉

This is why I think I need to give the boiler control of the pump It happens so frequently the last message from the vicare app was That’s definately Wiser buggering around trying to save a bit of gas If I give the boiler control of the pump it won’t be able to stop it - as a result it’s regular attempts at saving gas will be thwarted I might have to go back and tell Wiser it’s an Oil Boiler not a gas boiler again - that helped a lot with the old boiler but I’d told it it was a gas boiler again when I had the new boiler installed (clean slate and all that)

I’ve set the TRV setback at night to 10 deg lower than day time setting to stop that issue happening at night - day time I’m hoping that weather comp and the correct flow rates thro each rad stops that happening. Last year I stopped Wiser intervening on the approach to target room temps by having one TRV set to 5 deg higher than target room temp and not having it on the rad (std non smart TRV was on the rad) that and a pump overun stopped the Wiser from shutting down the heating and leaving the boiler hot and kettling

Oh I tried the switch it off and on again trick….. Boiler now reset to dumb boiler - no weather comp (well I’m doing manual weather comp based on what I think the house needs) and it’s heating water and running CH fine Waiting on Viessmann technical before we try this WC and HW demand thing again Tomorrow the job will be running a cable from pump back to the boiler so boiler has control of the pump - should stop the 75 errors I’m getting when Wiser decides to pause the heating. Floor is up in places already so might as well do that Quite tempted to run another run of 22mm copper to split the flow and returns (currently they are slapped together in the same notched joist) then I can insulate the pipes individually we shall see how today goes (roofing the shed with EPDM has priority before the weather turns to shit)

One manual on the bypass rad all the rest are wiser

And today I has nothing……, CH - all rads call for heat, pump fires up and water circulating at 1.1 m3/hr - boiler does nothing HW - (CH zone closes HW zone valve opens), tank stat is calling for heat, water is circulating at 1.2 m3/hr - boiler does nothing cool beans!!!!!

Ok so I downloaded the vicare app at this point I wasn’t looking for a solution I wanted to understand what was going on So there you are the weather comp curve in the app WTF is going on!!!!! Lets see if I can change that That’ll do for now hit save and boiler does a massive stall and modulates down to 3/5th’s of (expletive deleted) all and temps start falling fast It actually then cut out and 20 mins later fired up at a nice 37 deg C and 10.6 % modulation (which I cannot work out as kWh because it makes no sense at all)

So Friday progress - some good, some not so good but might be normal - who knows??? System drained down (so we could swap out the zone valve) HW demand box fitted and wired into the boiler - that required lifting some floors again as well as feeding it alongside the flow and return pipes from boiler to HW tank. Wifi module fitted - getting that to work involved a bunch of calls to Viessmann technical help NC Zone valve for CH swapped out for the NO zone valve System refilled - christ I hate how bad this system is from a drain down - my last resort is often putting a hose on one of the drain points and sticking mains pressure up the pipe...... Massive air lock again - every bloody time this system is a cow to re-fill) eventually opening the lowest point drain valves for both flow and return as well as the boiler drain valve o they flowed resulted in a shit load of spluttering followed by a decent flow and then all the rads filled and bleed out nicely Boiler then re-set up with weather compensation (wasn't done last time because I didn't want weather compensated HW heating) we set the slope to 1.4 (which is the default) I actually think 1.2 will work but lets be on the high side we can always decrease or increase if my guess is wrong............ So time to fire it up and that's where the fun started Needed some HW for bath night HW selected boiler fires up 60 deg flow temp set point - well that's a bit crap can we ramp it up a bit - bath night I normally run the boiler at 70 deg flow to get the tank to 60 deg. No matter what we tried the 60 deg was the max............... so HW demand box ignores the weather comp but caps the flow temp to 60 deg C 45 mins later I had a tank of 50 deg water and I took the attitude that that'll bloody do if she wants a hot bath she'll have to drain the damn tank Lets do CH Boiler capped at 37 deg C - I can lower it but not increase it - it's maybe 12-13 outside so that kinda lines up with the slope (ish) Lets give it a go So what I expected - boiler would fire up drive up at a fairly soft rate initially - it would monitor the flow and return and with a stone cold system wind up the burner to match the flow and get up to target temp fairly quickly It did just that but over shot 37 deg - that's OK I thought it often exceeds the flow temp by up to 6 deg to keep running rather than cycle (neat trick that unless you have flow and return temp monitoring you'd never bloody know but I have just that set up so no concerns here) At an actual 56 deg flow temp I had concerns!!!! I'll do what I did next in another post because I need some screenshots from my phone and they aren't on this PC so just imagine the Eastenders theme tune is banging away as this post ends

You were doing so well until the last section ^

Collected the I-Joists tonight - they've been dry stored for a while it seems but are new and never used Need to have a google and see how best to join them end to end 1. minimise cutting losses 2. provide addition strength where the join isn't above a roof truss I was thinking OSB sandwich plates either side of a join and either screw thro or bolts?? Before anyone goes a bit nuts bear in mind they are being joined over a max span of 600mm - it's not like they are being joined to create a larger span - that would be a bit daft