Improvements in and relating to fireboxes.

摘要

This invention relates to improvements in fireboxes and mare particularly to a firebox which is adapted for the combustion of both low and high energy density fuels. The firebox (1) incorporates a base or floor (2) having an apertured portion (16) which is a smaller proportion of the area of the floor of the firebox, the apertured portion is provided to supply 0xygen to high density fuels supported on the floor of the firebox, the restricted area of the apertured portion restrict the flow of oxygen to the fuel and thus at least the maximum combustion heat output of the high density fuels to substantially similar levels to that of a full charge of low density fuel placed into the firebox. In this manner, the construction of the firebox restricts the danger of overheating of the firebox when combusting high density fuels in a firebox of a size to accommodate low density fuels.