All gas logs should be burned with the doors wide open even if a mfr tells you they are approved for closed doors.
Gas fireplace doors open or closed for heat.
Compatible with a traditional masonry fireplace the decorative compatible with a traditional masonry fireplace the decorative and bi fold pleasant hearth ascot collection glass fireplace doors have a 1 piece welded frame and a high heat powder coated black finish.
Large 10 class a metal chimney required hefty 1000 lbs of masonry firebox unsealed good radiant heat and open to the room no fans or accessory heat ducts.
Ceramic glass doors a masonry fireplace and do not care about any heat coming into your room then it is ok to burn a fire with your glass doors closed.
Oxygen is a key element in healthy burning fires.
If you close the doors the flames pull towards the glass where it can impinge and shatter the glass.
It is still an open hearth fireplace which is susceptible to aerodynamics.
Allowing your fireplace doors to remain open will promote better airflow.
Open no glass doors like isokern or firerock with add on gas burning unit fake ceramic logs.
If your fireplace doors are shut oxygen cannot reach the flames.
In the off chance you have.