Efficient Air Purification: The HVAC Duct Purifier utilizes a 18W UVC lamp, emitting ultraviolet light at a 254nm wavelength to effectively obliterate most harmful substances from HVAC duct surfaces, improving air quality and creating a clean, healthy habitat. EPA Est. No. 94721-CHN-1 Reliable and Long-Lasting Quality: Each lamp tube has a lifespan of up to 8,000 hours and comes with 2 spare lamps, greatly extending the ac uv light's overall lifespan. To ensure durability, it is recommended to avoid frequent on/off cycles. Effortless to Use and Maintain: The mechanical switch control is straightforward, and the LED indicator clearly shows the UV-C bulb’s operational status. The 1.5-meter extended power cord offers greater flexibility for installation. Wide Range of Applications: With an effective purification area of up to 600 square feet, this air purifier is suitable for large-scale HVAC systems in schools, hospitals, homes, offices, and more. Quick and Simple Assembly: The detailed manual and complete set of accessories make installation fast and easy, even for beginners, allowing setup to be completed in no time.