AprilAire's 210 is sold as a nominal 20x25x4 MERV 11 media filter. AprilAire and APR Supply both list its actual size as 20.6 H x 26.63 W x 4 D in.
| Filter | Part numbers | Actual size (as published) | Notes | Sources |
|---|---|---|---|---|
| AprilAire 210 | 210 (MERV 11) | 20.6 H x 26.63 W x 4 D in | Nominal 20x25x4. For AprilAire 1210, 1620, 2210, 2216, 3210 and 4200 air purifiers; 2120 and 2200 AprilAire or Space-Gard need Upgrade Kit 1213 (per AprilAire). | [1] shop.aprilaire.com [2] aprsupply.com |
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