Infrared heaters are designed to emit energy in a very specific wavelength — the highly beneficial infrared wavelength.
Energy comes in a range of wavelengths. The visible light we see falls into one part of this range. Ultraviolet rays and x-rays fall into other parts of the range.
While the infrared energy wavelengths range from 5.6 to 1000 microns (one micron equals one micrometer or one millionth of a meter), far infrared sauna heaters are designed to provide infrared waves with a concentration between 6 and 14 microns. FIR wavelengths of between 6 and 14 microns are believed to be the most beneficial to humans and other living things on Earth.
Nowadays, designers try to further fine-tune these heaters to emit energy in the 9.35-12 micron wavelength range. This narrower wavelength range is thought to be ideal for sauna users and maximize the benefits of the infrared sauna . This corresponds to a heat radiation between 98.6-120 degrees F.
DID YOU KNOW?
• The human palm emits far infrared energy between 8 and 12 microns.
• The energy output from quality far infrared sauna heaters so closely match the human body’s radiant energy that nearly 93 percent of the sauna’s far infrared waves reach the skin.