Definition of firebox 1 : a chamber (as of a furnace or steam boiler) that contains a fire. 2 : a box containing an apparatus for transmitting an alarm to a fire station.

What is firebox?

Definition of firebox 1 : a chamber (as of a furnace or steam boiler) that contains a fire. 2 : a box containing an apparatus for transmitting an alarm to a fire station.

What is the firebox made of?

Fireboxes are built from non-combustible materials, typically bricks or cement, which are designed to withstand the heat from open fires, or any wood burning, electric or gas appliance that is installed within the fireplace.