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Aprilaire 313 - MERV 13 Replacement Filter

The Aprilaire 313 is a MERV 13 replacement filter for many different Aprilaire Air Purifiers, to allow your systems to run efficienctly. This filter should be replaced once at year. Aprilaire 313 replaces following air purifiers filters: Model 1310 Model 2310 Model 3310 Model 4300