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    Going off the original theory of this thread. I...

    Going off the original theory of this thread. I have a slightly different set up, can someone confirm it'll work?

    I will be going for a single zone at the start using a BDR91. However together...
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    Hi Gordon, update on this.... Still designing my...

    Hi Gordon, update on this.... Still designing my system and collating the equipment.

    In the interim...

    Your point on the protection mechanism has had me thinking and searching for a similar...
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    No worries, thanks MTM 😁

    No worries, thanks MTM 😁
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    Just a thought, if I did go down the biscuit mix...

    Just a thought, if I did go down the biscuit mix route, fixing ply beneath the insulation, biscuit mix to the top of the joists. What's stopping me screeding the top... Surely the strength of the ply...
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    MTM, what's your thoughts and experience on a...

    MTM, what's your thoughts and experience on a biscuit mix instead of the metal plates, aside from the hassle. I figure with any decent level of thickness in boards, I could do with all the thermal...
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    Thanks Gordon, that makes sense. I wonder if the...

    Thanks Gordon, that makes sense. I wonder if the Honeywell controller has any such function or whether it can be added as an addition...
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    I think you're talking marine ply, yeah I'll skip...

    I think you're talking marine ply, yeah I'll skip that at 50 a sheet... Although I'd be able to park the car in the kitchen with the strength of it :D

    I'll have to go down the chip board route...
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    No you're kidding! About the t&g.... I have come...

    No you're kidding! About the t&g.... I have come from a house using chip board and hated it, especially in a kitchen where it could get wet. Is this the only way around this? Final finish will be...
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    Bear with me on this. If the UFH is controlled by...

    Bear with me on this. If the UFH is controlled by the BDR, then surely the pump will only be running ad hoc throughout the day, therefore negating the protection and constant 'on' time causing the...
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    Perfect, thanks MTM. I'm going to be lifting the...

    Perfect, thanks MTM. I'm going to be lifting the t&g boards, fitting 75mm kingspan between the joists, then fitting the aluminium panels with the pipe grooves, then refitting the t&g boards. Thinking...
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    Thanks for gathering this info Gordon, very...

    Thanks for gathering this info Gordon, very useful. Are you running this via an Evohome? From your initial description I was taking the electronics to mean a management centre such as the Honeywell...
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    Thanks Gordon... I have looked high and low at...

    Thanks Gordon... I have looked high and low at manifolds and can only see either bare manifolds, or those with the pump and blend valve attached. Are you suggesting you have something different to...
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    Thanks again for this, I've been trawling Google...

    Thanks again for this, I've been trawling Google to find as much info as possible. Any pointers on manifold brands and material? (been looking at stainless polypipe) I had also assumed Grundfos was...
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    So with the actuators, you can spec MT4 or 8's...

    So with the actuators, you can spec MT4 or 8's https://theevohomeshop.co.uk/22-underfloor-heating-controls , i had read that this was the sizings inside 4mm and 8mm?

    Also, this chap in this...
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    Hi MTM I know for certain that the boiler is...

    Hi MTM

    I know for certain that the boiler is requesting 100%... The boiler is an ATAG IS32, so plenty big enough to feed my 250L cylinder. That aside, the way my system is set up means that when...
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    Thanks MTM I get that EHome treats the hot...

    Thanks MTM

    I get that EHome treats the hot water as a zone (BDR91) and requests max heat, as you wouldn't want anything less for HW. My concern is born out of what was happening prior to me...
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    Evening chaps Gus, I can't see that this is...

    Evening chaps

    Gus, I can't see that this is anything to do with the Atag, the boiler is a slave to the Evo OT module which in turn is a slave to the Evo Controller - the system is a CH system...
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    Thanks Gus, Firstly apologies, I have just seen...

    Thanks Gus, Firstly apologies, I have just seen your PM from February explaining the same set up!

    I agree with what you say, it would make sense for the HW to get priority, for the CH to take over...
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    Morning chaps! Happy New Year.... :) After...

    Morning chaps! Happy New Year.... :)

    After investigating this for the last few days, it seems me adjusting the ON time for the CH to coincide beyond the main CH morning warm up, has solved the...
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    Can anyone confirm, when buying a manifold - if I...

    Can anyone confirm, when buying a manifold - if I need the blending valve? From what I can make out, it's for protection, ensuring the max heat going through is limited
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    Another ancient thread resurrection 😁 I...

    Another ancient thread resurrection 😁

    I thought I'd get this in before 2019 rears its head.

    I am running an unvented cylinder with OT Evohome and full rad valve set up on a IS32 Atag. When my...
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    Definitely worth digging deeper in that case. ...

    Definitely worth digging deeper in that case.

    I would check the lever, but the normally open valve on the Heating doesn't have one. I did read the instructions when I sourced the parts and this is...
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    I'll have to have a listen, see if there's...

    I'll have to have a listen, see if there's flow....

    Difficult one isn't it, it should just be as straight cut, so that's the only thing it could be in theory. Although the heat cycle at the time...
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    What you describe I should already have... I'm...

    What you describe I should already have... I'm using Opentherm so you don't use a BDR91 to fire the boiler. I have one BDR91 which is wired for the HW. The hot water valve is normally closed so when...
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    Actually, apologies, the Honeywell suggestion is...

    Actually, apologies, the Honeywell suggestion is a valve on the hot water side only for an Opentherm build. But I have a normally closed valve on the heating too so when the water heats up in summer,...
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