C
commercialman
CO2 on it's own is a very important value and if it is under or above a certain number for a boiler, I can tell you with my eyes closed what's wrong with it.
As i said , CO2max is around 11.9% , a read out of 8% , 9% or even 10% will not tell the operative whether CO2% is on the rich side of stoich or the lean side.
What CO2% are you looking for? .... CO2 percentages alone does not tell you anything , i suggest you look into CPA1 , Kevin @ GES is a great bloke (maybe he can look in & advise?) , make that call.
I am not a Troll , just someone who's been in the trade a few years.
Have a look at these three print outs.....
O2%................... 2..................... 4.......................6
CO (ppm).............100....................300.................700
CO2%..................10.76.................9.62................8.48
CO/CO2 ratio........000929...............00031............0082......eek
XS air...................10.58.................23.6.................40.26
As you can see CO2% alone doesn't give us the full picture.