👉 A firebox is a structure used for storing and heating fuel or other combustible materials, such as wood, coal, or oil. It typically includes a fireproof enclosure that houses the fuel or material being heated, while also allowing air to circulate around it to maintain a stable temperature and prevent overheating. Fireboxes are often found in residential or commercial settings for use in heating systems, but they can also be used as storage units for other combustible materials such as coal or oil.