Empire manufactures log sets and burners to suit any application in sizes ranging from 16 inches to 30 inches, in Natural Gas and LP.. 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.