<br><br>On Mon, 15 Apr, 2013 at 8:41 PM, Philip Canavan <p_s_canavan@yahoo.co.uk> wrote:<br>
<blockquote type="cite"><div style="color:#000; background-color:#fff; font-family:Courier New, courier, monaco, monospace, sans-serif;font-size:12pt">OpenTherm isn't open as you or I would know it, but it is the new 'industry standard' and is cross-vendor, so it's the most likely target for OpenTRV and many other things. It's also worth seeing whether any custom interfaces\software the vendor provides is in Java - there's no chance they'll claim anything but Windows support (on a domestic system) so Java is the best option you'll have. I went for a Remaha (aka Broag) Avanta which ticked all the boxes, is suitably efficient and supports "advanced" options like a weather compensation add-on. I've been very happy with it, but Other Heating Systems Are Available.</div></blockquote><div><br></div>Thanks, very useful advice! It'd be even better if Gmail hadn't sent it to the spam folder which it now does with every other OpenTRV email.<div><br></div><div><br><blockquote type="cite"><div style="color:#000; background-color:#fff; font-family:Courier New, courier, monaco, monospace, sans-serif;font-size:12pt"><br><br><span class="tab"> What's probably just as relevant as which boiler you get is how you're connecting it. I've got a discrete system with dual zone valves for independent HW
cylinder</span> and heating control, with a pressurised cylinder; others like an on-demand combi system;</div></blockquote><div><br></div>I'll probably go with a pressurised cylinder as per discussions I've had with them so far.</div><div><br></div><div><br><blockquote type="cite"><div style="color:#000; background-color:#fff; font-family:Courier New, courier, monaco, monospace, sans-serif;font-size:12pt"> and Damon (and the theorist in me) would argue for a heat store and an exchanger.</div></blockquote><div><br></div>Damon? Argue? Surely not!?</div><div><br></div><div><br><blockquote type="cite"><div style="color:#000; background-color:#fff; font-family:Courier New, courier, monaco, monospace, sans-serif;font-size:12pt"> You could go for a diverter valve that gives you on\off and either HW or CH, but I've never understood why. It's worth asking your fitter what they're going to give you (unless you're doing a straight drop-in swap).</div></blockquote><div><br></div>That's the point: I have the opportunity to ask for things so I intend to make use of that ability!</div><div><br></div><div>Bruno</div><div><br></div>