If your fireplace doors are shut oxygen cannot reach the flames.
Gas fireplace doors open or closed for heat.
This results in a dull blaze with little heat output.
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.
All gas logs should be burned with the doors wide open even if a mfr tells you they are approved for closed doors.
Allowing your fireplace doors to remain open will promote better airflow.
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.
Open no glass doors like isokern or firerock with add on gas burning unit fake ceramic logs.
Oxygen is a key element in healthy burning fires.
99 of the time your fireplace doors should be open when you are burning a fire.
Designed as a surface mount these track free doors sit outside the fireplace opening against a flat surface and help reduce.
If you close the doors the flames pull towards the glass where it can impinge and shatter the glass.