Xs air at 500

[richardd]

I carried out a check on a flue today.all other measurements were fine ratio o.oo25. The xs air seemed very high thou 500 as I have stated . The boiler was a Worcester si model 10year old and the flue run vertically for 2.5meters until it exited the property on a pitched roof.
Could someone explain xs air in more detail and this reading. I know high reading can effect fuel consumption. But is there any safety issues here thanks . I am in my first year on the register.

 

[CMairiD]

You know what me ole' mam used to say? "If you keep pouting like that, you'll trip over your lip!"

:wink:

 

[diamondgas]

You know what me ole' mam used to say? "If you keep pouting like that, you'll trip over your lip!"

:wink:

Mothers are always right too Mari 🙂

Back to the post ..... whatever si the op has though, there seems to be something wrong with the readings they've posted, as SimonJohns points out, would you agree?

 

[CMairiD]

Mothers are always right too Mari 🙂

Back to the post ..... whatever si the op has though, there seems to be something wrong with the readings they've posted, as SimonJohns points out, would you agree?

I agree with Simon ... something's amiss and like him I'd be curious to see the O2% and well as a double check of the CO2 reading. Well, while your at it, just scan us the print out! 🙂

I can never remember seeing excess air has high as 50%, much less 500%. Got a stack of print outs on my desk at work so I'll have a jolly good rummage tomorrow.