A hotbox is a gas fire, which by its design, delivers a flame effect - combined with heat.

This category of fire typically delivers between 2.5 Kilo Watts and 3.5 Kilo Watts of heat.

To explain this heat measurement figure, a 1 Kilo Watt of Heat would be the equivalent of a 1 bar electric fire.

A hotbox has a box built around the flame, which controls heat loss to the chimney, and as a result it delivers more heat to the room than that of a basic "Coal Effect Fire".

Hotbox gas fires are generally fitted into a rectangular opening and for this reason are not generally suitable for fitting into a "cast iron fireplace".