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| Round Top Louver Vents |
Custom Vents: Standard - Functional Vents.
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| Stock Number |
Nominal Outside Dimension |
Rough Opening Width x Ht. |
Air Flow Sq. In. |
| PRT1818 | 18"X18" | 14"x15" | 78 |
| PRT1824 | 18"X24" | 14"x20" | 104 |
| PRT1830 | 18"X30" | 14"x27" | 140 |
| PRT1836 | 18"X36" | 14"x34" | 176 |
| PRT2424 | 24"X24" | 21"x20" | 188 |
| PRT2430 | 24"X30" | 21"x27" | 255 |
| PRT2436 | 24"X36" | 21"x34" | 321 |
| PRT3030 | 30"X30" | 27"x27" | 335 |
| PRT3036 | 36"X36" | 27"x34" | 401 |
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