Cast iron grates are used in furnaces as the basis for fuel. Having a lattice shape, they improve the movement of air and promote a good burning process. The fuel (coal, firewood) placed on the fire grates is additionally dried when the furnace is ignited, which also improves the quality of combustion and increases heat transfer. Grate bars for a hosper furnace are a monolithic flat fixed grille made of cast gray cast iron. This material is considered one of the most durable and wear-resistant. It will serve for a long time, without requiring replacement. Iron grates are easy to clean with a brush included in the josper oven kit.