Vanguard's new Scarlet Oak is part of their newest log line, and brings a remarkable new technology to the field of vent-free gas fireplace logs. To duplicate the look of a real wood fire, the Scarlet Oak includes a glowing, flickering coal bed at its base. This appearance of glowing coals is achieved through the use of Ceremat, which is a material visually and technically far superior to rock wool. (Rock wool is a lesser quality glow material, and looks like brown fiberglass insula...