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.