Monessen offers a complete line of vent-free fireboxes for use in its line of vent-free gas logs as well as other vent-free gas logs that fit within the specified minimum hearth area. Monessen's unique 2 in 1 FLEXIBLE-FACE SYSTEM converts from a circulating to a radiant face in seconds. The Monessen Smartline Vent-Free Firebox also features a unique drywall lip, flat faced standoffs, lava rock lip, low profile hood, quick access panels to gas valve, removable floor for easy access to valve and blower, and the easily interchangeable and optional decorative louvers and accessories.  All Monessen 24" to30" vent-free logs fit within the most compact GCUFA36 firebox. Shown here with black louvers.