Gas vs Charcoal Grill: What the Published Specs Actually Say

Almost every gas-versus-charcoal comparison opens with temperature. Charcoal sears at 700°F, the story goes, while gas tops out somewhere around 550°F.

Weber publishes neither number.

We went through the specification pages for both of the grills below — the gas Spirit E-325 and the charcoal Original Kettle Premium 22 — and there is no maximum temperature on either. Burner output, cooking area, dimensions, warranty terms, grate material: all published. Peak grate temperature: absent, on both. Any article quoting one is quoting something other than the manufacturer.

So this comparison uses what Weber actually prints. Both grills come from the same company, which makes the numbers directly comparable in a way that a cross-brand comparison never is.

The cooking-area difference is three square inches

This is the finding that surprised us most.

Weber lists 450 square inches for the Spirit E-325 and 363 square inches for the Kettle Premium 22. That reads like the gas grill gives you a quarter more room.

It does not. The 450 breaks down as 360 square inches of primary cooking area plus a 90 square inch warming rack — Weber says so on the same page. The Kettle's 363 is one grate, all of it primary.

The charcoal kettle has three more square inches of primary grate than the gas grill. Anything you actually sear, you sear on the same amount of metal.

The warming rack is real and useful — it is where buns and finished food go while the rest cooks. But it is a holding shelf, not searing space, and folding it into the headline figure is what makes the gas grill look roomier than it is.

The footprint difference is not three square inches

Where the two genuinely diverge is how much patio they occupy.

Same depth, within half an inch. But the Spirit is more than twice as wide, and covers roughly twice the ground area, to deliver three square inches less primary grate.

That is the trade in one line: identical cooking surface, double the footprint, in exchange for a knob.

Weber publishes no weight for either grill, which is worth knowing if you were planning to move one regularly. What it does publish is the shape: the Spirit is a cart, and the kettle is a bowl on three legs.

What 31,000 BTU does and does not tell you

Weber lists 31,000 BTU-per-hour input across three stainless steel burners for the Spirit E-325.

BTU-per-hour input is a fuel consumption rate. It says how fast the grill can burn propane. It does not say how hot the grate gets, because that depends on the cookbox volume the heat has to fill, how the Flavorizer bars distribute it, how much escapes through the lid, and the weather.

This is why the missing temperature spec matters rather than being pedantry. There is no published number, and the one number people substitute for it does not mean what they think it means. A grill with a higher BTU rating and a bigger cookbox can easily run cooler than a smaller one.

Charcoal has no equivalent figure at all. Heat output depends on how much fuel you load and how far open the dampers are — both set by you, neither specified by Weber.

Warranty: the same ten years, covering different things

Both grills carry ten years on the body, but the coverage is shaped differently.

The gas grill has more parts that can fail, and Weber covers its two consumable ones — grates and Flavorizer bars — for half the term of the body. That is not a defect; it is an accurate signal about which components wear.

The kettle has a bowl, a lid, a grate and three vents. Fewer parts, all covered for ten years, and the failure mode is rust rather than a component going bad.

Which one to buy

Buy the Spirit E-325 if you cook on weeknights and the ignition-to-food time is what decides whether you cook outside at all — and if you have roughly 48 inches of width to give it. The warming rack is genuinely useful for feeding several people at once.

Buy the Kettle Premium 22 if your space is tight, or if you would rather not own a second propane tank. You give up nothing in primary cooking area, you halve the footprint, and every part is covered for ten years.

What should not decide it is a searing temperature, because neither manufacturer publishes one. If a comparison hands you a precise figure without a source, it made it up.