How to Choose a Gas Grill: Burners, BTUs, and Materials

Burners: how many heat zones do you cook with

The number of burners roughly equals the number of heat zones you can set at once, and zones decide how flexible the grill feels in daily use. Two burners let you run one side hot and the other off for indirect cooking, which covers chicken, ribs, and anything that benefits from a slow side beside a searing side. Three or four burners add freedom when you cook several foods at different settings in the same session. The real question is whether the layout supports the two-zone cooking you will actually use, so picture a typical cookout and count the heat levels you need at the same time.

Extra burners help only when they create a zone you will use. Count your menu before you count the knobs.

BTUs: what the number means and what it hides

BTU stands for British thermal unit, the energy needed to raise one pound of water by one degree Fahrenheit, so a rating describes potential heat output, not cooking quality. A higher number is not automatically better: guidance from Weber states the same point, because efficiency and design matter. What matters is how efficiently that heat reaches the cooking surface. Compare ratings only between grills of similar size, and read the figure alongside cooking area, burner layout, and material. A large cookbox with too little heat struggles to sear, while a small one with excess heat wastes fuel. Treat the number as one input among several.

BTU says how much heat a grill can put out, not how well it cooks. Read it as one input, never a verdict.

Materials and build quality

The parts that rust are the ones you touch and see: the cart, the cookbox, the lid, and the cooking grates. Porcelain-enameled steel and coated cast iron resist weather well, and stainless steel is common on pricier grills, but not all stainless is equal, so check gauge and grade rather than trusting the label. Look at the welds, hinges, and lid fit too, because the grill lives outdoors and construction quality decides how long it stays safe and sturdy. Cast iron grates hold heat well but need oiling to keep rust away, while porcelain-coated grates are easier to maintain, so choose the finish you will actually care for.

Thin metal and loose hinges fail first. If the cart wobbles in the showroom, it will wobble on the patio.

Propane or natural gas: decide before you buy

Gas grills split into two fuel systems, and the right choice depends on your house, not on the grill. Liquid propane runs from a cylinder you connect, refill, or exchange yourself, and modern cylinders carry overfill-prevention devices that stop them from being filled too full. Propane is easy to move and easy to keep a spare on hand. Natural gas is plumbed into the home and is usually connected by a professional, so there are no tanks or refills, but the grill stays tied to one fixed point. Propane suits renters and changing setups. Natural gas suits a permanent outdoor kitchen, so confirm which connection your space supports before you pick a grill.

Gas is safe when the setup is sound, and the setup starts with ventilation. Use the grill outdoors only, away from siding, railings, eaves, and overhangs, and never in a garage, tent, or any enclosed space, because burning gas produces carbon monoxide that builds up fast in tight air. Check the hose and connections for leaks before each season with soapy water on the fittings, and open the lid before lighting any burner. Keep grease from pooling in the tray and on the firebox, since grease fires are a common cause of grill accidents. Close the tank valve when the grill sits idle.

Never light a gas grill with the lid closed. If you smell fuel, turn off the tank and wait before relighting.

Size, extras, and what to skip

Size the primary cooking surface to the biggest cook you host, not the quiet weeknight dinner. Many gas grills add a secondary warming rack on top, which is useful for buns and food that finishes early. Cooking area is quoted in square inches, but how that space divides into heat zones matters more than the total, because a single big grate you cannot split cooks everything at one temperature. Leave room around the grill for airflow and for the lid to open fully. Measure the spot on your deck before you shop, and pick a grill that fits the space with room to spare.

Extras like side burners, rotisserie kits, and sear stations earn their keep only when you use them. Most cooks get more from a thermometer in the lid, a well-fitting cover, and a grease system that is easy to clean, because those parts affect every cook and every cleanup. Draw the line at gadgets that duplicate what your other equipment already does. And since the temperature inside the meat is what decides whether food is safe, keep a probe thermometer handy and check cuts against the safe internal temperature tables published by USDA and FoodSafety.gov before serving. Color is not a reliable sign of doneness, and neither is a lid dial that reads air temperature.