boiler fumes

[tiddlytums]

My neighbour has a boiler extract about a meter from my house, from which there is a steady smelly stream of steam! It smells poisonous - perhaps there is some carbon monoxide in the fumes. I can no longer sit outside my kitchen when their boiler is going, which is most of the time. Can I do anything? I have asked them to extend their pipe so that the fumes extract further up, but they have been told by their plumber that the boiler will then become too inefficient.

[Iggle Piggle]

The plumber is right, the flu needs to be 'balanced' for proper boiler operation, but I'm sure there is a fitting that can angle the flu away from your house?
Sorry I'm not much use on this.