Plus ca change . . Heating question - long

[Doctor Drivel]

Please eff off, you are silly snotty uni type. Arf, arf.

[Nicknoxx]

Sorry. I'd forgotten how pointless it was. Where's Andy when you need him?

[Doctor Drivel]

Amazing here is a know-it-all who comes on asking questions. He gets answers which were not the answers he wanted. How does he know what the answers should be if he doesn't know? Mmm. If he knows it all why is he asking here.

Please eff off - Quick.

[John Rumm]

Yes I think that is the case... similar problems reported with the Powermax etc

Just about doable on the top end non storage combis then... ideally a cold main that can supply 25lpm or better would be wanted.

Pressureis not usually a problem in that most systems will run with as little as one bar. The limitation is often flow rate - long runs of 1/2" cold main to older properties does not help.

If you are desparate to go the mains route there is also the option of either upgrading the feed, or adding an accumulator - but both of these are going to add to the cost.

You should be able to get two showers at a time - even with on demand heating, but bath filling would often be at the exclusion other uses unless you have stored hot water to feed the bath.

Splitting the coax flue out to two separate (and a little flexible) 2" plastic pipes may solve that problem. You may otherwise find choice of boilers very limited these days.

Would you still require planning consent for a small "through the wall" flue terminal?

[Doctor Drivel]

Plank, the W-B 440 has been going for many years and is reliable. A few Friday nighters doesn't mean a lemon.

The MAN 76kW can do it very well. Rinnai multi-points can do it more than well too.

[John Rumm]

So new gas and water mains then, all for under £2K including the boiler and heat bank.

As clueful as ever dribble.

[Nicknoxx]

John Rumm wrote: big snip

Not possible I'm afraid. The ground floor inside is below ground at the back of the house IYSWIM and the first floor is right on the pavement so through the roof is the only way. Keston tell me that it is possible to use the existing chimney but only if I can make access to the pipes every three metre to make joint inspection possible.

[Doctor Drivel]

Plank, not with a Rinnai.

You were not on about the money side.

[John Rumm]

You will be telling us they do a tile hung version with thatch designed to go on the outside of listed buildings next.... using push fit terracotta pipe no doubt.

[Doctor Drivel]

The plastic drain pipes they specify are available in 20 foot lengths. This should do.

[Doctor Drivel]

Plank, do they have that? Fab, gear, man.

[Nicknoxx]

Where?

[Doctor Drivel]

Ask around at the dealers or makers.

[Ed Sirett]

If the Chimney is dead straight the you should be able to get the flue pipe (56mm OD) down to the boiler. The air intake may also be routed that way or via another route to outside.

Other makes have a twin pipe adaptor but the Keston saves on the cost of that from the outset.

Sanicondens or equivalent is your friend here. But an unvented cylinder discharge pipework would be a big problem, much less so for the primary releif pipes.

The BIG contraint is the discharge pipe work, must be metal, downhill, big enough and go to a ground gully.

Might be OK then.

[Nicknoxx]

Can you expand on "ground gully" It sounds like the sort of thing that can only be found outside which might be a bit of a problem in this case.

There is some sort of 4" waste in the room but without further exploration, which will hopefully happen next week, I can't say any more.