Keep a 2-3 cm thick layer of insulating ash. The ash layer insulates the bottom of the stove in the same way as the fire bricks or vermiculite board on the sides of the stove. This ensures a high combustion temperature which contributes to a cleaner more efficient burn.
Furthermore, the ash layer protects the riddling grate against premature failure and increasing its life expectancy. Empty the ashpan as required. Store any hot ashes in a suitable ash bucket until all embers are fully extinguished. Cold ash can then be disposed of on the garden compost or with the rest of your household waste.