Empire offers ceramic fiber, traditional refractory concrete, and Burncrete® logs. Each log is hand-painted to bring out the rich detail. Vent-Free Burners are approved for use in any certified vent-free firebox. They may be also installed in an existing wood-burning fireplace, with the damper closed, to operate as a vent-free heating system. For applications where you want the ambiance of a fire without the heat, our Millivolt and manual burners are also certified for installation as decorative vented log sets.