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Good explanation of weather control further down this page http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=189 Well worth it, and I'll look into Viessman boilers as well, thanks :)

Hi, My boiler is about 30-40 years old. I found a box on an outside wall that was unsightly and I thought it was a duff telephone ringer until i took it apart and found a thermostat inside. I figured it was to bring the heating on when it froze or something. Vaillant say "With this...

Hmmm, I always thought the outdoor sensor was a bit of a gimmick, I actually removed it from my current system as I didn't understand why the outside weather should bring my heating on (it might already be warm inside). I'll do some reading on them, but what is the real benefit? I figured...

Ok good thinking. I'll disconnect the blue water pipe into the house tonight and see what the flow rate is then, currently it goes from 25mm blue water pipe down to 15mm, then from that one of those smaller bore tap into the pipe kits (about 10mm id) for my outside tap. So would I run 22mm...

Just did the bucket in the garden ... 11.5 litres / minute. They're doing the water pipes in the road at the moment so maybe it'll improve but looks like my super shower with a combi idea might be out the window?

A good point, well made. I could probably reduce my boiler cost by 25% if I stop worrying about 'forever'. Great, thanks. I have purchased a pressure gauge and when it arrives I'll check my pressure and flow rates. I'm (not really) surprised that none of the plumbers that quoted me for a...

Thank you very much, very helpful reply! I suppose I wanted to go big on the boiler in case I build an extension, and thought a plumber had recommended that one due to the hot water store. It's physically massive though, I'd like a smaller one that fits in my downstairs loo / utility better...

Hi, Yeah the water pipe has been replaced with 25mm blue EPDM. Ok that's interesting, I'll make sure the shower I aim for is combi compatible, thanks. All but one point in the house comes from the tank and has poor flow. I was just worried that if I turn the cold tap on in the...

The bathroom taps are slow, but they're from the old tank/old plumbing. The shower comes in on the new main downstairs, through some ancient galvanised pipe to the loft, then into new copper to the shower. The shower is ok, but on highest setting in the summer when the water is warmer to start...

Ok, that makes life easier and cheaper thanks. Also a bit more space in the loft and no worries about stuff freezing up there anymore. Good point about the combi, I'm sure the pressure is ok, and I just had a new water main run in from the road. Thanks again

Hiya, I'm replumbing my house at the moment, 3 bed detached, 1930s. It has old steel pipe pretty bunged up, cold water and heating storage tanks in the loft, a massive old boiler and a hot water tank. I'm going to go for a combi to get some space back by losing the hot water tank, probably...