My central heating and hot water boiler for my private apartment is producing a sooty smell that smarts on the eyes. I have it cleaned twice in last 6 months - both times it had a LOT of soot and took an age to clean. Last week we had the flue cleaned and had a small amount of soot in it. Still the problem persists so we took decision to replace it. Problem I have is that the engineer cannot replace it for two weeks - I'm reluctant to let anybody else do it as he has done other work for me that was first class.
So...question Sooty smell - making eyes slightly water - is this carbon monoxide? Is it dangerous?