Oven ranges use gas or electricity to cook food on a stovetop and in an oven. Gas and natural gas oven ranges pre-heat faster than electric ranges and provide evenly-distributed heating while cooking. Electric oven ranges use heated coils to cook food on the stovetop or inside the oven. These ranges offer precise heat settings but take longer to preheat. ENERGY STAR-certified appliances use less energy and perform as well or better than unrated appliances, and may contribute to a lower monthly energy bill.