Aprilaire Merv 13 Replacement Media for 1310/2310/3310/4300

Aprilaire 313 Air Filters are the heart of your air purifier. Be sure to use the model specified for maximum performance. Aprilaire 313 Air Filters are designed to fit the Aprilaire Model 1310, 2310, Model 3310, and Model 4300 Air Purifiers. Features: Aprilaire 313 Air Filters have a high-efficiency MERV 13 rating Genuine Aprilaire Self-Seal™ #313 ensures the best performance Change Aprilaire 313 Air Filters once a year