Cube briquettes work by limiting oxygen penetration due to their dense, solid structure. With very few internal air gaps, the combustion progresses slowly from the outer layer toward the center. This restricted oxygen flow creates a long, steady burn and a stable heat profile. The symmetrical flat surfaces allow heat to radiate evenly on all sides, which is why cube briquettes maintain consistent temperatures for BBQ, cooking, or household stoves.

Hexagonal briquettes with holes operate using a “chimney effect.” The central hole pulls oxygen upward through the briquette, increasing airflow directly to the core. More airflow means a more active combustion process, which boosts heat output and ignition speed. The hexagonal exterior provides structural strength, while the internal airflow system ensures higher temperatures and faster heat response compared to solid shapes.

Solid hex briquettes work by restricting oxygen to the outer surface since no airflow can enter the center. This forces the briquette to burn slowly and steadily from the outside inward. The dense mass stores heat well, making temperature output smooth and stable without sudden changes. This controlled burn behavior provides long-lasting heat ideal for slow cooking or applications needing sustained temperature.

Pillow briquettes function by maximizing exposed surface area. Their wide, slightly curved faces allow oxygen to contact a larger portion of the briquette at once, increasing the combustion rate. Because the briquette is thinner, heat reaches the core quickly, causing a fast light-up and strong initial heat. This design leads to quick ignition and high heat, though with a shorter burn time compared to denser shapes.

Stick briquettes work through mass-based heat retention. Their long, dense bodies prevent deep oxygen penetration, causing combustion to occur very gradually from the outside inward. The larger volume stores more thermal energy, releasing it steadily over time. This slow, controlled burn gives stick briquettes the longest burn duration of all shapes, making them ideal for extended cooking and long, steady heat demands.

Round donut briquettes function by promoting rapid airflow through their center hole. The large opening increases oxygen circulation, similar to a mini furnace or chimney, accelerating the combustion process. Heat concentrates toward the center as air moves through, creating fast ignition and high temperatures. This shape is ideal for quick heat-up because the airflow pathway increases the burn intensity.