Radiant Charbroilers utilize metal radiants which transfer the heat source & are more durable with less maintenance than lava rock. Also as a rule, radiant Charbroilers will cook faster & cleaner than lava rock broilers. Radiant broilers also allow the meat juices & fats to drip on the radiant heat source which causes a flare up. This smoke gives your food that backyard BBQ flavor. Radiant broilers are typically more expensive, but last longer and are easier to clean.