1) 160 Degree Super Radian Heating Surface
The FIR Dome is covered with a very fine multi-faceted acute-angle silicon surface, when rays are scattered in all directions by the countless surfaces created by the silicon crystals, the effectiveness of the 160 degree span is amplified, the radiant transmission area is increased by some 10-fold.
2) FIR Dome emitts 8-10 micron Far Infrared Ray
With the combination of these two design concepts: a special reflective silicon surface and the proper wavelength, it is possible to generate levels of FIR energy high enough to produce the effective results. source