Panel system Thermo-D Rw A is a type of wall paneling made from thermally modified wood known as Thermo-D. After being heated to a high temperature, the wood undergoes chemical changes that make it more stable, durable, and resistant to decay and insects. Rw A refers to the rough-sawn finish of the surface. As a versatile design system, Thermo-D Rw A can be applied to residential, commercial, and industrial projects. Due to its natural origins and environmentally friendly production process, it is also a popular choice for eco-friendly and sustainable building projects.