High frequency is also called Radio frequency, it applies heating with high frequency. It can penetrate wood deeply and dry the wood moisture from core to the surface uniformly. It also equips vacuum together. The drying effects is much better. It is suitable for all kinds of wood, especially for large wood beams, hard wood, rare wood as well as veneers drying. HF Vacuum Wood Drying Machine is many times faster than traditional kiln dryers.
There are combustion methods. Dry kiln is a large-scale drying equipment used in industrial production. It is widely used in cement industry, metallurgical industry, wood drying, brick drying and other production.