The Y6604 Merv 16 Clean Home Furnace Filter is compatible with Lennox Y6604 PureAir PCO3-20-16 Air Cleaner Merv 16 Home Furnace Filter for HVAC System. Compare to Part PCO3-20-16, The Y6604 filter is designed to replace the Pureair PCO20-28 model and fits many models accepting 20x26x5 filters. FEATURES: 1. The Y6604 20x26x5 merv 16 air filter is fully compatible, ensuring a perfect fit and optimum performance. 2. Installing the Y6604 air filter is hassle-free, allowing you to quickly and effortlessly replace the old filter and improve your indoor air quality immediately. 3. The Y6604 merv 16 clean furnace filters can filter over 98% of impurities, providing you with the highest quality air environment. 4. With highly durable construction, this filter is built to last, maintaining its filtering efficiency over time and reducing the need for frequent replacements. Package: 3 X Y6604 filter replacement Warm Tips: It is recommended to replace every 8-12 months depending on the usage and environment. Disclaimer: This is not an OEM product. Any brand names or logos are the registered trademarks of their respective owners. Any use of any brand name or model designation for this product is made solely for the purpose of demonstrating compatibility.