Fireplace back | Article about Fireplace back by The Free Dictionary
The rear wall of the firebox; usually constructed of firebrick and sloped forward to reflect heat back into the room, and provide room for a smoke shelf above it.
References in periodicals archive
You could actually install your own stacked stone fireplace back
in the UK.
This could be the year that you bring a boarded-up fireplace back
I keep the award in the middle of the fireplace back