Drying firewood increases its energy density by boosting combustion efficiency, improving its storage capability and lowering its transport weight. Drying firewood also lowers the production and emission of smoke and ash during combustion.
Dry firewood has a high combustion efficiency due to the elimination of water, which slows the burning process. The blue-gray flame emitted by wet firewood has a low heat output and short burn time, which translates to high fuel costs. However, drying firewood boosts the burn time and generates more heat output. Dry firewood ignites faster, and has a larger flame that is efficient for indoor and outdoor heating.
Dry firewood can be transported easily, since its lighter and convenient. This reduces the transportation costs incurred during logging and transfer to households and farms. It can also be stored without generating molds, since air can flow easily between the logs. Dry firewood produces less smoke during combustion, which reduces air pollution. It has low levels of unburned tar and water, which are already eliminated during the drying period. Chimneys where dry firewood is used are cleaner and clear. Dry firewood has less bark and debris, which prevent the spread of the smoky smell, especially when firewood is used for indoor heating.