Wood Kiln Drying Time Chart

Wood and softwood species.

Wood kiln drying time chart. Also today we are often kiln drying no 2 common lumber which requires a milder schedule than upper grades. Newer wood drying technologies have included the use of reduced atmospheric pressure to attempt to speed up the drying process. Drying times and kilns the traditional rule of thumb for air drying lumber is to allow one year of drying time per inch of wood thickness. The authors state that the minimum air drying times listed are for lumber stacked for drying in southern locations in the spring or early summer.

We pioneered the development of dehumidification drying as a practical economical drying method. See table 1 for actual dimen sions presumably because of the lack of data these values are only ranges of time estimates. As a result the kiln schedules were too severe. The kiln is nearly air tight and the de humidifier drains through the floor.

With the insulation we can use the kiln in the winter in ohio as the returned heat from the de humidifier and the fan motor are sufficient or we can add a small heater. In the original dry kiln operator s manual written in the early 1950s some species were not used in high quality products. We air dry for about one month then rack the wood in the kiln and use a dehumidifier and small fan. 1 since 1977 nyle has been building the world s most energy efficient lumber dryers.