The Relax Far Infrared Sauna has a FIR heater (automatic controlled ceramic semiconductor chip). There are 3 components of the FIR heater: FIR materials, Heat Materials & Control Component

The 2 patented FIR Radiators (pictured above) have fans in them. The electric current sends Far infrared Ray energy light out from the semi-conductor chips. The purpose of the Fans are to keep the 40 Patented Semi-conductor chips cool. Because of this, the emitting of the healing FIR energy rays are continuous. This is why the relax sauna generally works in about 1/2 the time of other FIR Saunas.

Most of your other saunas do not have a continuous flow of energy, because their units get too hot, and thus  automatically turn off to prevent any damage. Their energy goes on and off.  You generally cannot tell because Far Infrared Light cannot be seen by the human eye.  So you can't see it going on and off. (Same principle as to what happens when your computer fan goes out.)
 

Because of the reflecting nature of the material that the Sauna is made out of, the Far Infrared Rays are able to circulate throughout the Sauna, allowing every part of the body to absorb the theraupeutic light.

The Patented Automatic Heat Controlled Ceramic Semiconductor combines heat materials, FIR Materials, and a control component.

       
Pictures of the FIR heating unit (with fan)

The research principle on this is: Ceramics do not conduct electricity!

By changing the atomic structure, the material which will radiate the Far Infrared Rays after absorbing energy is then added. It was then confirmed by top scientists in Taiwan that the wavelength is between 4 um and 14 um which is suitable (and reported to be very beneficial) for our bodies.

The device that can automatically control the temperature (for the user's safety) was then added. This device allows the ceramic semiconductor  chip to lower the electric current when the heat is too high, and to increase the electric current when the heat is too low. Thus the heat is kept at a steady temperature at all times.

The mirror-like surface of the Sauna tent reflects the far infrared LIGHT back over and over and over again - thus creating an EVEN distribution of the Far infrared Light in the tent, whereby you are absorbing the light from every nook and cranny of the tent. In other saunas, you only absorb the light from the source of far infrared light, and thus only about 1/2 to  2/3 of you gets the benefit of the far infrared light. The Sauna whirl is symbolic of the EVEN DISTRIBUTION of Far Infrared Light.

A fourth level of FIR Technology (the ceramic (computer programmed) semi conductor chip) filters out all of the non-healing energies, so you do not have to contend with anything but the absorbable far infrared light of 4 - 14 microns.

What is Far Infrared Ray (FIR)?

Far Infrared Ray is a form of electromagnetic light energy from the sun. It falls within the same family of the Infrared Ray in the light spectrum, but due to its longer wavelengths, FIR cannot be seen by human eyes - just like ultraviolet rays and X-rays. This energy is absolutely essential for human beings and all living things in the world.

Only Far Infrared waves between 4 and 14 microns can be absorbed by the human body. Near Infrared, or Medium Infrared light is resisted by the body.  Its wavelengths are NOT in harmony with human energy. Ultra Violet energy is much stronger than near infrared, and because of this, when our body resists this energy, it causes Friction. As a result of this intense friction caused by the body's inability to absorb this light, the skin will tan and burn after a certain amount of time and exposure.

Why is FIR so unique to the Human Body ?

FIR has the ability to penetrate, refract, radiate and reflect.  The human body can absorb FIR because of its deep penetrating ability.  When FIR penetrates through skin to the subcutaneous tissues, it transforms from light energy into heat energy.  The thermal effect within the deep layers of the tissues causes bloods vessels and capillaries to dilate, promoting better blood circulation and thus better healing opportunity as oxygen is more efficiently transported to the cells of the body.  Additionally, the heat produced helps to get rid of body toxins and metabolic waste through sweating.