Kiln-dried logs and seasoned logs are both types of firewood, but they are processed differently and have different properties.
Kiln-dried logs are logs that have been heated in a kiln to remove most of the moisture content. The process of kiln drying involves heating the logs to high temperatures, which can be up to 200 degrees Fahrenheit, in a controlled environment. The high heat and controlled environment of the kiln dries the logs quickly and effectively, leaving them with a moisture content of around 15-20%.
Seasoned logs, on the other hand, are logs that have been air-dried for a period of time. This process typically takes several months to a year, and the logs are exposed to the elements, allowing the sun, wind, and rain to remove the moisture from the logs. The moisture content of seasoned logs is usually around 20-30%.
The main difference between kiln-dried logs and seasoned logs is the moisture content. Kiln-dried logs have much lower moisture content than seasoned logs which makes them more efficient and cleaner burning. They tend to ignite more easily, burn hotter and for longer, and produce less smoke. Seasoned logs, on the other hand, are less expensive, but they will require more time to dry out and may not burn as efficiently.
Another difference is that kiln-dried logs are also treated to kill any insects or spores that may be present in the wood. This makes them a better option if you are looking to store your firewood indoors or if you have concerns about pests.
It's important to know the difference when purchasing logs for heating or cooking, because the moisture content of the wood can have a significant impact on how well it burns and how much energy it produces.