Lennox Y4594 608878-04 Healthy Climate Air Purifier Maintenance Kit provides everything you need to keep your PureAir PCO-12C system performing at its best. Designed for annual maintenance, this OEM kit includes a MERV 11 pleated air filter, a replacement metal insert, and two 55-watt UVA lamps. The filter’s 17 x 26 x 4-inch size captures common airborne pollutants such as dust, pollen, and dander, while the UV lamps and metal catalyst work together to neutralize odors and reduce chemical contaminants. Each component is engineered to fit seamlessly into your existing system, making routine maintenance straightforward and effective. With the Lennox Y4594 Healthy Climate Air Purifier Maintenance Kit, you can restore your unit’s performance and maintain healthier indoor air all year long.