Ultraviolet light reduces or eliminates harmful mold, bacteria and airborne pathogens from your HVAC system.  UV lights are very effective at controlling mold inside the air handler.  All mold in line-of-sight of the UV bulb will be killed, keeping the coil mold-free.  UV ligths are also great for reducing colds and flus as well as reducing smells/odors inside the home.  UV lights reduce clogging in condensate drain lines by preventing algae growth and they help maintain a cleaner coil, improving cooling efficiency and reducing electricity costs.