Aprilaire 413 MERV 13 Air Filters, 3 Pack, Compatible with Model 4400/3410/2410

Aprilaire 413 MERV 13 Air Filters, 3 Pack, Compatible with Model 4400/3410/2410 Designed exclusively for Aprilaire Model 4400, Model 3410, and Model 2410 Air Purifiers Compatible with Aprilaire Model 2400 or Model 2140 when using Upgrade Kit 1413 High-efficiency MERV 13 rating for superior air filtration Genuine Aprilaire Self-Seal #413 ensures optimal performance Recommended to change filters once a year Event-based controller for Aprilaire 3410 indicates when to change the filter