NOx Emissions governed by API?

[DeanShaw]

Hi all,

I am doing some development work for a client regarding burners and emissions.

I am a little stumped as to where the NOx corrected to 3% comes from? Every book I have read refers to local authorities, but all still refer to NOx correction at 3% O2 dry.
Is the 3% O2 governed by an API?

Any help would be greatly appreciated.

Regards,

Dean Shaw