Fireplace condensation

Her’s another one. I lit a sealed fireplace and the inside of the glass covered over with condensation. Never had that happen before. Then again I don’t see many of them.

House is air conditioned and warm moist air is comming down the chimney .
Am I correct
Roy Cooke sr

Try here:
http://www.nachi.org/forum/showthread.php?t=3690&highlight=fogged+fireplace

Good call Roy. That was my thought.
Larry