Because infrared radiation drying is fundamentally different from convection drying, it is necessary to have a better understanding of the distribution of infrared ray from an emitter which radiates to moist materials, with each material in the drying chamber receiving the radiation uniformly. In the moist material, water absorbs energy extremely efficient with wavelengths ranging from approximately 2.5 to 7 microns. Radiation intensity and the distance between emitter to the radiation absorbing surface (drying area) are important factors to consider (Ratti, Mujumdar, 1995).