Eggy smell from gas boiler???

[SJB060685]

Thanks for reply. Yes like you say H2S is found within the supply of gas, varies from where abouts in the country as a quick read suggests it’s common to have a higher concentration further north (not sure how accurate that is). Like you say I would imagine if it was coming from where you mentioned above then it would have POC’s with it and all are a possibility.
I’m going to have a more in depth read later.

 

[dan_the_plumber]

If it’s a ‘room sealed appliance’ and the seals are ok, then it can’t release POC into the room.
So I’d say either you have a hole in the condensate pipe, or the POC is re-entering the building via a window or vent.

 

[firemant]

If it’s a ‘room sealed appliance’ and the seals are ok, then it can’t release POC into the room.
So I’d say either you have a hole in the condensate pipe, or the POC is re-entering the building via a window or vent.

Are there any Condensing Balanced flue boilers?

 

[Chuck]

H2S gets oxidised by combustion and contributes to the SO2 in flue gas, which doesn't smell eggy. Gas hobs don't smell eggy, for example and their POC vent straight into the cook's face.

I'd be looking at the drains for a leak or untrapped sections that have slime from a washing machine outlet, that sort of thing. Are there any sections that would have got warmer than normal when the boiler was left on continuously overnight?

In some circumstances, the calcium sulphate in plaster can provide the sulphur needed to produce H2S but this is towards the bottom of a list of possibilities that has 'Drain Problem' at the top.

 

[Gazzzz101]

I have my CMDDA, and do carbon monoxide investigations regularly, as previously stated CO doesn’t smell, you’d only get a smell from the gas if it’s leaking or unburnt, the smell could be from the radiators if the system hasn’t been used for a while, or maybe worth tracing the condense and seeing where that’s connected?

 

[Inverness]

There's no condensate on this boiler.

 

[DjClubber]

Condense???