Savannah Genesis Infinity NG Gas FireplacesSavannah's GENESIS INFINITY Series Savannah's double glass linear gas fireplace. New RTC Technology for heat transfer maximum efficiency WITHOUT heat dump or louvers in your wall. Radiant Allowing the heat from the fire to naturally spill into the room Thermal Air flowing up over the radiant heat Convection Gently blowing air into the room Three or four fans combine airflow with 6 variable speeds and 7 flame settings will maximize room heating