Ships fast! Reduces airborne particles from bacteria to dust to pollen and more Replace annually Trade-marked Aprilaire Self-Seal technology reduces performance-hampering air bypass. The Aprilaire 410 is a MERV 11 air purifier replacement filter for Aprilaire model air cleaners 1410 2410 3410 and 4400. The collapsible pleated fabric filter media is easily installed to keep your HVAC equipment running at top efficiency. Trade-marked Aprilaire Self-Seal technology ensures the best performance by reducing air bypass. Ultimately this filter helps trap and reduce contaminants that can cause problems for persons afflicted with asthma and other respiratory issues. Order today!