A UV light, or ultraviolet light, is a type of light that is commonly used in air conditioning systems to help improve the indoor air quality. UV lights are typically installed in the air handling unit of the air conditioning system, and they work by emitting UV-C radiation, which is a short-wavelength, ultraviolet light that has been shown to be effective at killing or inactivating certain types of microorganisms, such as bacteria, viruses, and mold spores.

When the UV light is turned on, it is directed at the air as it passes through the air handling unit, and the UV-C radiation helps to kill or inactivate any harmful microorganisms that may be present in the air. This can help to reduce the risk of respiratory infections and other illnesses, as well as improve the overall air quality in the home or building. In addition to killing microorganisms, UV lights can also help to reduce the presence of odors, such as pet odors or tobacco smoke, and they can help to improve the overall efficiency of the air conditioning system by reducing the build-up of dirt and debris on the system’s components.