Ultraviolet light is part of the electromagnetic spectrum, that is, it is energy whose wavelength is less than visible light but greater than that of X-rays, said wavelength is between 200 to 400 nanometers (nm = 10- 9 meters), in other words, all UV light is invisible to the human eye.

UV Light Uses

Currently, in the air conditioner, the most widespread application of UV light is for germicidal purposes and very specifically in cooling coils, that is, it is used to keep them clean, free of algae or fungi, this helps to maintain their thermal efficiency and avoids the use of germicides in condensate trays.

Another use of UVS systems (ระบบ uvc which is the term in Thai) perhaps less known, but extremely important, is the elimination of the biological load of the air, this means that ultraviolet irradiation is capable of eliminating airborne microorganisms. To achieve this, it is necessary to determine what they are and in what quantities they are; this allows us to determine the “dose” of radiation required.

It is also possible to use UV light as an aid in the treatment or elimination of unpleasant odours, for this purpose UV lamps that generate ozone are used, which is injected into the air conditioning system, in this application the most important aspect to consider is the amount of ozone that is going to be produced. This same technology is used for the dilution of some contaminants.

Finally, there is a new technology that allows the ozone generated by the lamp to be combined with the water contained in the air (humidity), generating super-oxidizing molecules that represent a lower risk than ozone and that work after they are injected into the areas that must be treated, oxidizing pollutant molecules.