Charcoal burner is a productivity building which can be built in the 'Everwinter Glacier' kingdom unlocked at Level 25. The player can only start collecting charcoal after they have repaired the native village that's on the outskirts of the keep in "Everwinter Glacier". The charcoal burner can be upgraded to Level 11 like woodcutters and stone quarries. The productivity for a Level 1 burner will be lower than other Level 1 productivity buildings. The rate of production decreases in each charcoal builder that is built. It will produce 3 per hour but may produce higher or lower depending on 'Public Order' Here is a diagram of how the stats are displayed: