It is still an open hearth fireplace which is susceptible to aerodynamics.
Gas fireplace glass doors open or closed.
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.
Do not attempt to close your masonry fireplace doors until only a few embers are left burning in the hearth.
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.
All gas logs should be burned with the doors wide open even if a mfr tells you they are approved for closed doors.
If you close the doors the flames pull towards the glass where it can impinge and shatter the glass.
First open the flue.
Build a fire with dry seasoned firewood and kindling or fire starter bricks then close the metal mesh screen but leave the glass doors open.
Ceramic glass doors cost 3 to 4 times as much as standard tempered glass but they are designed to withstand the high heat that fireplaces generate.
Keep in mind the glass used with a wood stove is different from that used with a fireplace.
Leaving my glass fireplace doors open when i m not burning a fire is ok.
In the off chance you have.
How to have a fire.
A fireplace uses tempered glass that is resistant to physical shock.