The Theory of Infrared Radiation and the related techniques of infrared heat generation are new to many who are considering using infrared heating sources. Infrared should not be confused with ultraviolet or any other form of dangerous radiation. It is actually used in many different commercial and consumer applications, such as incubators in nursery wards. The human body itself radiates infrared energy, and as the earth is warmed by infrared rays from the sun it too radiates infrared.
Imagine sunbathing at the beach. When the sun is out you can feel its heat warming your body, but if a cloud moves in and momentarily blocks the sun, you feel a slight chill. This is because although the air temperature itself has not had time to cool, the cloud is preventing the infrared rays of the sun from reaching you.
Infrared is a section, or "band" of invisible light found on the electromagnetic spectrum. It's a form of radiant heat that can also be called "infrared energy." About 80% of the sun's rays actually fall in this part of the spectrum.
Far infrared, the energy produced in CZ Infrared™ and BioSmart™ Far Infrared Heaters, is the form of this energy that occupies the region where wave frequencies measure between 5.5 and 15 microns.