Aprilaire Media - Merv 13

Media For Model 2310 and 4300 (Merv 13) This Is The Replacement Filter For The Model 4300 Aprilaire Air Cleaner. The Filter Is The Heart Of The Air Cleaner and Needs To Be Changed Once A Year. Use Only Genuine Aprilaire Selfseal #313 To Ensure The Best Performance Of Your Air Cleaner.