501 Replacement Furnace Filter Compatible With Aprilaire 5000, 4 Pack Our 501 Replacement Filter Compatible with AprilAire 5000 Whole-House Air Cleaner Purifier - MERV 15. Product Dimensions ?: Package Include: 4 x 501 Replacement Filter Disclaimer: Compatible with: Our 501 Replacement Filter Compatible with AprilAire 5000 Whole-House Air Cleaner Purifier - MERV 15. Premium Filtration Performance: This 501 Replacement filter removes airborne particles as they pass through the MERV 15 filter including dust, pollen, hair, and pet dander. Product Dimension: 501 Replacement Filter size is 16 x 25 x 6 inches. It is recommended to replace every 6 months depending on the usage and environment. Value Package: Pack includes 4 x 501 Replacement Filter. Collapsible media designed to ensure easy installation. After-Sale Guarantee: If you have any questions about the replacement filter, please feel free to contact us, we are committed to offering top-quality products and promise 100% high-quality customer service.