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@flameport Loos - yes that is what I thought - we minimise toilet flush quantity (frequency and volume) and will be using grey water for some of the loos Solar - unvented - I read your post wrong :doh: - I agree with you, we are planning on the TS to be vented Thanks to all who have...

@ALEC1 - yes the integration is important. The zone conrrollers are quite sophisticated and take account of seasonal varations etc. The key part of this for me is balancing boiler and the solar, getting the right energy out to the DHW and UFH. Im not worried so much by the response to the...

@flameport Yes the system is more complex that your usual run of the mill house install. Datalogging is a way of doing sensible analysis so that you can get the system working at best. Do some analysis - make some changes and then quantify the results. Nowadays there are cheap ways of...

@Norcon - hoping to avoid the sludge as the UFH and TS are indirect to the DHW loop. Properly dosed and inert. Fair point on the heat exchanger - hope that will not be an issue as stainless coil and the UFH is a low temp, slow response system anyway as the floors have thermal mass to them...

Apart from the need for a header tank and associated pipework what are the main benefits of unvented over vented? The main benifits I see of the unvented TS is the ability to use the solar for both DHW and UFH and installation cost. Do you know what the typical efficiency gains are? I've...

In the end went for Renderlath system on 25mm battens I closed the base of the air gap with stainless beading to enable venting nd to stop insects and rodents

Hi All, Been reading on here for a while. As part of our house rebuild I have been working on our heating and hot water system design. I'm looking for any comments (constructive) that anybody might have so I can optimise and get a consensus point of view. Below are a system and...

Yeah - that's what I meant space the render boards off the outer skin by 5mm. How thick is render overall usually? Cheers Rich

Thanks John. Yes EML stainless is probably the route to go. Ideally I would go for batten and board but that'll be 35mm before the actual render. I want to keep the thickness down as much as possible as the breathable membrane is flush with the lower brickwork. In an ideal world the wooden...

I'm into a fairly large extension all in wood frame. The structure is from inside to out: Plasterboard 25mm service cavity vapour barrier 9mm OSB 89mm stud wall 100mm cavity (stud and cavity filled with warmcell) 89mm stud wall 9mm OSB Breathable membrane I want to...