Abstract: An improved fireplace assembly is described having a sheet metal burner and an associated set of simulated logs to create different sizes and shapes of flames, or flame patterns. The flame patterns generate hot exhaust gases which heat portions of the simulated logs to glow. The glowing appearance of these portions is enhanced by the use of filaments, whether in strands or in mat form. The filaments are attached to, embedded in, or wound about the visible face of the simulated solid fuel element. When heated sufficiently the filaments glow. The burner ports used in the assembly to generate suitably attractive flame displays may include large or non circular apertures or slots having local reinforcement to resist deformation of those apertures.