Monessen's Attribute Vent-Free Firebox is a single-sided gas firebox built for a traditional-style fireplace installation. Its circulating design pairs a radiant clean face with an angled firebox and engineered air channels that move heat into the room while allowing unrestricted airflow. A two-piece hearth gives access to the firebox without removing the log set, and mesh screens tuck into hide-away pockets when they're not in use.

The steel interior comes with reversible panels, offered in either a multitonal brown or a multitonal gray finish depending on the model, each showing two looks on one panel. Log sets are sold separately, so pair this firebox with a compatible Monessen gas log set to finish it.