How Long Do You Really Need to Preheat Your Grill? Kitchn
Turn all of your gas grill's burners to high heat and let the grill preheat for 10 to 15 minutes before adjusting the burners as needed for your recipe. Alternatively, if you plan to slow cook something like beercan chicken, you can turn your grill to medium heat and give it 25 to 30 minutes to preheat while you prepare the food.