D.M. Procida wrote:

It might be safe - but if you're worried about stale air, a fire in the
room is not going to create fresh air out of it.

"Stale air" though is less about air that's lacking in things, it's
about air that's also full of tobacco smoke or dogwaft. Burning that to
some simple CO2, provided you avoid the CO, seems reasonable enough

(and WTF is raden's problem?)