Highly Efficient Filtration Performance: The X8789 MERV 16 Filter is a highly efficient, compatible, easy to install and long-lasting air filter with upgraded MERV 16 technology that captures 95% of particles smaller than 0.3 micron and more than 90% of particles larger than 0.01 micron, significantly improving indoor air quality. Innovative Upgrade Material: Made of high-quality activated carbon material, it is highly efficient in filtration without increasing energy consumption. Newly optimized and upgraded to high-efficiency filtration material for various complex filtration environments, which can be better applied to homes, schools, hospitals and other places, and can easily replace the filters of furnaces, air conditioners and other equipment. Wide Compatibility: The actual size of this filter is 15.87 x 24.87 x 4 inches, which is compatible with PCO16-28 PureAir filter and other 16x26x5 inches furnace filters. Fully compatible with the Lennox PureAir unit PCO16-28 filter for a wide range of HVAC systems including furnaces, air conditioners, heat pumps and more. High Quality and Long Life: The manufacturer insists on using top quality materials with a life expectancy of 12-18 months, providing high efficiency filtration without increasing energy consumption, and providing strict factory inspection to ensure high quality and reliability of the product, which is higher quality than other products in the industry and can provide you with a quality indoor air filtration experience. Installation and Maintenance Recommendation: X8789 filter is easy to install, it is recommended to replace the filter every 12 months, or adjust the replacement frequency according to the actual use and environmental conditions to maintain the best filtration effect. The X8789 MERV 16 Filter is a highly efficient, compatible, easy to install and long-lasting air filter with upgraded MERV 16 technology that captures 95% of particles smaller than 0.3 micron and more than 90% of particles larger than 0.01 micron, significantly improving indoor air quality.