A BBQ heat deflector (also known as a heat setter, plate setter, or diffuser) is a critical accessory used to turn a direct-heat grill into an indirect-convection oven. It acts as a physical barrier between the fire and your food, preventing the intense radiant heat from charring the exterior while allowing hot air to circulate and cook the food evenly. Why You Need One Without a deflector, food placed directly over coals or burners receives intense, focused heat. A deflector is essential for: - Low and Slow Smoking: Ideal for brisket, ribs, or pulled pork. - Roasting: Perfect for whole chickens, turkeys, or large roasts. - Baking: Allows you to use your grill like a traditional oven for pizza, bread, or even cookies.