Pure-Beam™ ultraviolet light is designed for HVAC air disinfection and surface irradiation. The 17 watt UV-C lamp is a powerful tool to improve indoor air quality. It can be Installed in the HVAC system or ductwork on either the return or supply air side of the furnace or air handler. Exposure to Pure-Beam™ significantly reduces air contamination caused by fungus, mold, and viruses and can cleanse surfaces overcome by mold and slime. Includes the UV lamp, a UL listed ceramic base, and mounting bracket.