/ Product catalogue / Accessories / Filter Boxes / For Rectangular Ducts / FB (rectangular) / FB 1000x500
| B | B1 | B2 | H | H1 | H2 |
|---|---|---|---|---|---|
| 39 3/8” | 40 5/32” | 41” | 19 3/4” | 20 1/2” | 21 1/4” |
