The UV Light For Hvac Air Purifier technologies available should be chosen according to the type of pollutant you are trying to remove from the indoor air. Adsorption media such as activated carbon are effective at removing chemical pollutants, High efficient Particulate Air (H.E.P.A.) and electronic technologies are better suited to remove particles. There are also ultraviolet (U.V.) units available which are specifically designed to kill microorganisms such as viruses. Utilizing the various technologies together will make the greatest improvement in the indoor air quality of a home.