The DVS insert features the revolutionary Ember-Fyre™ Split-flow Burner. Selected by Popular Science® as one of the TOP 100 ACHIEVEMENTS IN SCIENCE AND TECHNOLOGY! The realistic Ember-Fyre™ "wood like" flame, along with the heat output can be controlled by the convenient GreenSmart gas system. The GreenSmart Comfort Control™ feature allows you to turn off part of the burner with the push of the button to really turn down the heat while maintaining the fire and glowing embers. This allows you to comfortably use your fireplace year around. The DVS GS insert comes standard with a quiet convection blower that is ideal for circulating the fireplace warmth quickly and evenly throughout the room increasing the overall efficiency of the fireplace. And now the DVS GSR insert comes standard with the very popular accent light for an added glow when the fireplace is on or off really showcasing the fireplace in every setting.