Chimney leak? Carbon monoxide

,mnb

I have a stove properly fitted to chimney (share chimney as its terraced houses).
The neighbour is after saying that they got knocked out last night they think from carbon monoxide. They think its caused by the fire I had on and maybe the chimney is leaking on their side.
Very strange. Anyone heard of this. No problems this side it seems. I had chimney cleaned a while back.

heinbloed

This seems to be a criminal installation, for heavans sake! Don't use this stove until a heating engineer has inspected and certified the safety of it.

Never share a chimney if the negative pressure (the chimney effect, 'draw') isn't guaranteed AT ALL TIMES.

If your neighbour is using a device sucking air out of his home (for example via a kitchen hood) than how will this be done without sucking air from the chimney into the house at the same time??

The installer should be brought to the courts, a ban of professional practice should be the verdict. In my opinion that is .....

meercat

agree ,dont use the stove until you get the installation checked out
can you confirm you are sharing chimneys
or is it one chimney stack with 2 independent chimneys
i would advise you and your neighbours to fit a carbon monoxide detector as a precaution just in case its not your stove causing the problems
remember get a qualified tradesperson to inspect your installation

JohnnieK

If they were knocked out by carbon monoxide they would not wake up to tell you about it. Was there ambulances involved?

Did the installer perform a soundness and spillage test on the chimney before installing?

ntpm

The chimney/ flue will normally be separate and have individual (two) pots.
Although the chineys are back to back they may appear to be the same as the chimney stacks may be look as one on the roof.

The best wy to check for leaks is to use smoke pellets and see that smoke exits the chimney flue.

Is the stove solid fuel.

Did you use the open fire before with solid fuel before. If so where their any issues??

CRACKED CHIMNEYS:
Possible that both yours and the neighbours chimney may be damaged and cracked and are leaking into each other.
Smoke test may be needed.
If damaged the chimneys may need to be relined.

Also you may need to consider relining with flexible flue to ensure your chimney is 100% sealed.

CLIMATIC CONDITIONS:
I would suspect that there may be an issue with down draft in their chimney.
At the moment the air is very cold and very light or no wind.
Any smoke/ fumes leaving your chimney may be getting drawn down into their property.

Get the original installer back to check installation.
Do not use until inspected.
Get carbon monoxide detectors.

,mnb

Thanks for the replies. It is not a shared chimney as I thought just looks like that.
It seems it may be an issue with downdraft from my neighbours chimney. They may have no ventilation in their home. They are going to get chimney balloons and ventilation.
I have stopped using it since although its freezing here and Im going to get a carbon monozide alarm.

heinbloed

A downdraft could be started by very 'cold' flue gases leaving the chimney pot.
If this is the case check the combustion of the apliance, there must be something wrong with it. CO should not be created with an efficient combustion.
Check the existing flue for sooth deposits, cracks.

If the combustion is imperfect the flue gas temperature will be reduced and the meassured CO values rise. But this is only one of a few possibillities, get the specialist in.
Wet timber might be one source of the problem, an unsuitable chimney/air supply another.