About This Item

• Aftermarket Replacement Filter For Aprilaire 213
• Merv 13 Efficiency Rating, Nominal Size: 20X26X4, Actual Size: 20X26X4 1/8
• Fits In Air Cleaner Models 1210, 2210, 3210 And 4200
• Can Be Used In Air Cleaner Models 2200 And 2120 If Cabinet Is Upgraded With 1213 Media Upgrade Kit
• Also Replaces Source-1 Part S1-Fm213 , Aprilaire Is A Trademark Owned By Research Products Corporation. The Seller Of This Product Is Not Affiliated With Or Endorsed By Research Products Corporation.