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What is Far Infrared Ray (FIR)?


Far-infrared radiant (FIR) heat is a completely safe from of naturally occurring energy that heats objects by a process called direct light called infrared heat or infrared energy. Direct light conversion warms only the object and does not raise the temperature of the surrounding free air. This type of energy penetrates 2-3” deep into the body and is thought by some to increase circulation and nourish damaged tissue. FIR heat is not ultraviolet radiation but a narrow band of energy within the 5-15 micron level. The infrared segment of the electromagnetic spectrum is divided into 3 segments of wavelength measured in microns or micrometers (a microns = 1/1,000,000 of a meter); 0.076~1.5microns=near or close; 1.5~5.6 middl of intermediate ; 5.6~1,000 = far or long wave infrared. The infrared segment of the electromagnetic spectrum occurs just below (infra) to red light. This band of light is not visible to human eyes but can be seen by special cameras. We can, however, feel this type of light we perceive as heat. Our sun produces most of its energy output in the infrared segment of the spectrum. Our atmosphere has a window in it that allows infrared rays in the 7-14micron range to safely reach the earth’s surface. When warmed, the earth radiates infrared rays in the 7-14 micron band with its peak output at 10microns.

The sun is the primary source of radiant energy, but not all of this energy is beneficial. Although life needs energy from the sun, too much sunlight damages the skin. FIR heat provides many of the health benefits of natural sunlight without any of the dangerous effects of solar radiation.
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