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Great, thank you! I hadn't considered that. I'll leave the living room wide open along with dining room as it has doors opening onto the garden. I'll control the temperature there by the controller and use TRVs to tune the rest of the house to match. I'll get a better TRV for the bedroom as...

Does the boiler give off any heat? It's a small loo and a massive boiler :) I can retrofit one after if I need it. That's interesting, as it's wireless I'll have the option to move it out of the hall if I don't use the room sensing/fiddle with it much/want to show off my £4k of new heating...

Cool thanks. The boiler is going in my downstairs loo in a lean to on the back of the house which won't be very indicative of the temperature. I think it's wireless so I was going to put it in my hallway, it looks quite flash so should be fine. Still trying to decide if my loo will need a...

I don't doubt a quality plumber (one who cares about it rather than sees plumbing as a means to an end) would do this and more for me, and have experience to call upon. Sadly I can't afford one or don't have time to seek out a good one so it's down to me :) I suppose everyone has their own...

Hi, sorry, three quotes for what? I've had five plumbers come around to replace my boiler and even British Gas didn't check my water supply. I've got a friend who will do the connection/commissioning/gas/paperwork and check I've not made a screw up and the rest I can do myself. Look, fight...

Ok that makes sense, I think I half thought that. I only want to buy decent taps so I'll look out for flow regulation. I agree, as I think this through there is little that will be happening simulataneously. The boiler output is 15mm for HW, should I step it up to 22 to the room and back...

Thanks guys. Well whatever I get will be a step forward. I think you're right, electric is the way forward and much more within my capabilities / budget. Does anyone fancy taking a look at my diagram on page 3 please and see if you think the layout makes sense? Basically all CH on 22mm...

Hmmm back to the 937 and UFH, after a lengthy email with questions, Vaillant technical support said this "Thank you for your email. It will be fine to use the 937 but we don’t recommend using Vaillant controls where there is underfloor on the system. Regards" Which is incredibly...

Thank you very much for explaining all that. Ok, as the cost of doing it the more technical way looks like it'll be at least £1200 for my little bathroom it just isn't worth it. A electric system is the cheapest/easiest bet, just be nice to have the floor warm in the mornings when we...

Thanks Alec. Yes was going for a 470 with weather compensator. The UFH is for a first floor and just to help the floor dry/remove the cold tile feeling. The UFH would be sandwiched above the floorboards and levelling board and the tile, so hopefully the heat would be ok. I'd still need a...

Anyone please? Still waiting on Vaillant about the UFH, electric might be better or not at all :) Thanks

So now my gf is considering UFH for the bathroom, so that's added some grief. Could go electric, but will try to figure out how to do it with the 937, although I believe that makes it complicated. Here is my plan, so mostly 15mm copper, seperate feeds to different areas of the house...

Thanks Chris. I'll avoid cheap isolators then, never considered that, thanks! My plan was to run 22mm from the mains to the boiler, and T off that in 15mm for the rest of the house. So from that run one 15mm through the house and T off it for each tap. Does that sound reasonable? Or...

Hi, Yeah, didn't turn on any taps from the tank, just ones run direct from mains (kitchen tap and shower) to get as much pressure drop as I could for dynamic pressure reading. But my static pressure of 3.5 bar is quite good right? I need to rig something up direct off the mains to measure...

Hello, Ok I had a quick test on the weekend of the pressure, haven't had chance to rig up something to test it with some better bore pipe yet though. Static pressure 36psi - 2.5bar Dynamic pressure 13psi - 0.9bar To get the dynamic pressure I turned the shower and downstairs taps on...

Thanks Chris, yeah just a figure of speech really, having had it explained on this thread I'll certainly be an expert on my water mains before I choose the boiler. My pressure gauage with outside tap fitting just arrived. Does the pipe bore affect the static pressure, e.g. my outside tap is...

I've got a plumber already who's happy to do the install/gas safe bit and I can do the donkey work. I will probably miss out on the 5 year warranty but I'll have saved a packet anyway. Lots to think about, just hope I've got enough flow/pressure :)

I've just looked and my outside tap is on a 8-10mm bore extension, so hopefully flow much better when I measure it properly. I have looked for the Viessmann but they don't seem to be so readily available to buy, and the 222-F is about £900 more than the 937. Probably stick to a Vaillant as...

Nice to hear a 937 recommendation. I think I am headed that direction although it'll be harder to find space for it. I'll certainly fit a blender, thanks again. Shame they're not doing the 5yr warranty at the moment though.

Sorry, just wondering what do I need a blending valve for? To add cold to the hot water feed out of the boiler? Thank you