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| Half Round Louver Vents |
Standard - Functional Vents.
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| Stock Number |
Nominal Outside Dimension |
Rough Opening Width x Ht. |
Air Flow Sq. In. |
| PHR14 | 14"X9" | 10"x6.5" | 23 |
| PHR18 | 18"X12" | 14"x8" | 37 |
| PHR24 | 24"X15" | 21"x13" | 89 |
| PHR30 | 30"X18" | 26"x14.5" | 148 |
| PHR36 | 36"X21" | 32"x17.5" | 245 |
| PHR48 | 48"X27" | 44"x23.5" | 525 |
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