micky wrote:

....snip...

When I say at the end I don't think it will change anything, I mean I
don't think it will change the character of an oil (or gas) fire to
either make the air in the house dirtier or make more carbon monoxide,
or something else I wouldn't like. DD3 says the same thing, iiuc.

Just for the record, I don't recall making any comments related to dirty
air or carbon monoxide.

But someone here in the last 15 years once said it would, and iirc no
one posted a disagreement.