dnb

After specing the rest of my new heating, I come to the boiler flue...

I have a (probably crazy) idea to use two stainless flue liners of diameters 7" and 5" (or there abouts - haven't got the boiler requirements to hand) in our chimney to make a 9 metre vertical concentric balanced flue.

Has anyone thought about doing this? Am I mad for considering it?

All help/sugsestions gratefully recieved!

RON

You need to be very careful with gas flues, the fitters won't fit anything that ain't right, get a corgi fitter, and maybe save yours and your families life!
Ron.

dnb

Will be talking to a conple of local Corgis tomorrow to see what they say.
I really don't want to be playing on our house roof by myself - it's too high for me!

I just wondered if a flue liner solution was remotely possible - AFAIK it doesn't seem to break any building regs, or the flue rules in the boiler manual. However that doesn't mean I haven't overlooked something.

Discussing things here means I have a head start on the people saying "It can't be done" (when what they really mean is "I can't do this because I don't know how") No disrespect to anyone out there intended - I've just seen some rather unsatisfactory work done in the last few years, and I'm trying to avoid that happening again.

Sorry for the long post, and thanks!

mattstant

dont mess with balanced flue boilers I am in the building trade and gas boilers should only EVER be touched by approved Corgi plumbers.

jjones

get a divorce now it will be cheaper in the long run

bugger wrong type of boiler.

dnb

Turns out that it wouldn't work as the chimney was much too tall for the boiler - it can only draw air down a relatively short pipe.

The manufacturer says I can still use the chimney as an outlet, and not have a balanced flue, provided there is sufficient room ventilation (still to be assesed) the combustion air can be drawn in separately.

BTW - I repeat I am not intending to do the work myself! I am only interested in what is possible and what has been done in the past...

My step father is in the building trade as well, but he works in an area where there is no mains gas, so knows very few Corgis.
I suppose that living in Central London has given me some poor experiences of tradesmen.



[Edited by dnb - 7/29/2002 1:30:48 PM]

[Edited by dnb - 7/29/2002 1:40:20 PM]

[Edited by dnb - 7/29/2002 2:32:51 PM]

scooby nutter

The manufacturer says I can use the chimney as an outlet, and provided there is sufficient room ventilation (still to be assesed) the combustion air can be drawn in separately.

so then its a open flue boiler then isnt it!

a balanced flue boiler gets its air for combuston from out side and doesnt require a seperate air sorce.It is a room sealed appliance.

a open flued boiler uses a liner/metal bestos twinwall flue to get rid of the fumes.The air for combustion comes from the room,hence why we have to put air vents through to the outside,thats for the air to come in.

Duncan ,Corgi installer

dnb

The manufacturer said they can supply the boiler as either a balanced or open flue. (Strangely it seems they have the same model no, just to add confusion...)

Thanks for that - I knew there were some Corgis here somewhere.