Flat Oval Duct Fittings
| Major Dimension Ducy Width | Spiral Seam Duct Gage |
| to 24" | 24 |
| 25" to 36" | 22 |
| 37" to 48" | 22 |
| 49" to 60" | 20 |
| 61" to 70" | 20 |
| 71" and up | 18 |
Designed by Megaweb.co.th
| Major Dimension Ducy Width | Spiral Seam Duct Gage |
| to 24" | 24 |
| 25" to 36" | 22 |
| 37" to 48" | 22 |
| 49" to 60" | 20 |
| 61" to 70" | 20 |
| 71" and up | 18 |
Designed by Megaweb.co.th