Ignis - 28&quot; One-Sided Ethanol Burning Firebox Fireplace Wall Insert - A single-sided ethanol fireplace designed to be installed into the wall or custom cabinetry, this ethanol fire box employs patent-pending technology to make it among the safest ethanol fireplace inserts available in the nation. In addition to its ultra-safe composition, the FB1212S, a ventless firebox designed by Ignis, uses Environmentally-friendly bio ethanol fuel so there are no vents or pipes to install - simply the firebox itself.