The primary differences between seasoned and kiln-dried hardwood firewood lie in the drying process, moisture content, and how these factors affect the burning performance:
1. Drying Process:
- Seasoned Firewood: This is firewood that has been cut, split, and allowed to naturally dry over time, typically for 6 months to 2 years. The drying process occurs through exposure to air and the elements.
- Kiln-Dried Firewood: This firewood is dried in a controlled, high-temperature environment (a kiln) for a much shorter time, usually 24-48 hours. The kiln uses heat and airflow to rapidly reduce the moisture content of the wood.
2. Moisture Content:
- Seasoned Firewood: The moisture content of seasoned firewood can vary, but it typically ranges from 15-25%. If it's not fully seasoned, it may still have higher moisture levels, leading to less efficient burning.
- Kiln-Dried Firewood: Kiln-dried wood has a very low moisture content, often around 10-15%, which is optimal for burning. This makes it more efficient and produces more heat per log.
3. Burning Performance:
- Seasoned Firewood: If properly seasoned, it burns fairly well, but if it hasn't dried long enough, it can be harder to light, produce more smoke, and give off less heat. It may also leave more creosote build up in chimneys.
- Kiln-Dried Firewood: This wood burns very cleanly and efficiently with minimal smoke and a higher heat output. It's easier to light and maintain a fire.
4. Storage and Convenience:
- Seasoned Firewood: Needs to be stored properly to ensure it stays dry, which may involve covering it during the winter and stacking it off the ground. The drying time can be unpredictable, depending on weather and how well the wood is stored.
- Kiln-Dried Firewood: Since it has already been dried, it’s ready to burn as soon as you buy it. It can also be stored more easily and requires less concern about moisture content.
5. Cost:
- Seasoned Firewood: Usually less expensive since it requires less intensive processing. However, the price can vary based on the time of year and quality.
- Kiln-Dried Firewood: Typically more expensive due to the energy and equipment required to dry it in a kiln. The faster drying process and convenience often come at a premium price.
In summary, kiln-dried firewood offers a more consistent, efficient burn with less hassle, while seasoned firewood can be a more economical choice, though it may require more attention to ensure proper drying and storage.