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Edit: just seen you’ve amended your post - turn it off and open the window!
Anything above 35ppm and I get people out of a confined space at work. Any reading at all and we’d prefer not to have anyone inside.
For an indication of cost, we recently paid just over £3k for a 35kw high-end Vaillant combi with smart controls, power flush, new thermostatic valves across the house and a new bedroom radiator. There was a fair bit of work involved in re-routing pipes/etc - they were here for three days IIRC.
Dramatic_Hammer-
just seen you’ve amended your post - turn it off and open the window!
Yeah, it went higher :D
All windows in the kitchen open, and he's off to buy a new flue, pipe and siphon... the boiler will be OK until it's replaced in January as it's not failing on other fronts.
But the flue... I mean fuck, this thing has been leaking since installation because it doesn't even fit and never has done. I have service records going back a decade and not one engineer caught this.
At least it's going to be good after today, but this is today's four figure surprise.
Velocio
Leaking carbon monoxide into the kitchen... so the current setup is going to require remedial work just to get it through to January.
Carbon monoxide leak is registering at 175ppm around the flue, it should be below 10ppm (so says the Pimlico engineer) and above 6ppm should be cause for investigation anyway just to determine source and safety level.
If this sounds wrong to anyone please say... but yup, his device is showing 175ppm when the hot water is heating, which is solidly in the not good area. The flue is basically venting directly into the kitchen (as well as outside).