Two hospitals located in hot climates - one in a high-humidity environment, the other in low humidity - have turned to ultraviolet (UV) light to solve many of their maintenance and efficiency problems.
Artificially produced UV light waves in the C band (UVC) have been used for nearly 100 years as a very effective germicidal force in water and on surfaces - and, more recently, in air conditioning systems to reduce infectious microbes. But the key to improved air conditioner efficiency lies in UV light's ability to improve heat exchange efficiency and reduce maintenance by eliminating mold and mildew from coils.