Why coal stove require fanning?

Fanning the coal helps control the coal burning speed and to provide even heat. Without fanning, coal cannot burn quickly and there would be much less ash remaining after combustion. In addition, the coal's fumes contain carbon monoxide which is flammable and can cause an explosion if not properly controlled. Fanning the coal helps regulate airflow, allowing some of the fumes to escape while still maintaining enough oxygen to keep the fire burning. Additionally, fanning also ensures the even distribution of oxygen throughout the coal, which helps in its complete and efficient combustion.