Designed for reliable HVAC air treatment, this 36W zero-ozone UV-C light delivers stronger UV disinfection than standard 6–25W lamps. Its 253.7nm UV-C wavelength provides instant, maximum germicidal efficiency, and a slight odor during first use is normal. For added peace of mind, the unit meets ETL safety standards and complies with EPA and CARB ozone limits, maintaining ozone levels below 0.05 ppm, equivalent to zero ozone, when used as intended. Installation is straightforward with the included template for positioning the unit on the exterior of your ductwork. Simply drill the opening, insert the lamp, and secure the ballast with screws. Setup requires at least 16 inches of available space and a nearby electrical outlet. Choose HOLD mode for continuous disinfection or AIRFLOW mode to activate the UV light only when airflow is detected, allowing you to tailor operation while reducing energy use. Designed for versatile HVAC applications, this UV light helps reduce contaminants in circulating air and on internal AC system components, making it suitable for schools, hospitals, hotels, offices, and other settings. Built for dependable, continuous operation, it features a durable 2G11 4-pin ceramic base and quartz glass that allows clear UV light transmission while supporting long service life.