Try one of the following:
| Ducting System | Actual dimensions (mm) | Space requirements (mm) | Airflow mm² |
For 4" (100mm) extractor fans or for low power cooker hoods up to 250m³/hour | |||
|---|---|---|---|
| System 100 - Round | 100 | 106 | 7,854 |
| System 100 - Rectangular | 110 x 54 | 116 x 60 | 5,940 |
For medium extraction rates or if available depth is limited up to 500m³/hour | |||
| System 125 - Round | 125 | 131 | 12,272 |
| System 125 - Rectangular | 150 x 70 | 156 x 76 | 10,500 |
For 6" (150mm) extractor fans or for high power cooker hoods up to 500m³/hour & above | |||
| Megaduct 220 - Rectangular | 220 x 90 | 227 x 97 | 17,968 |
| System 204 - Rectangular | 204 x 60 | 210 x 66 | 12,240 |
| System 150 - Round | 150 | 156 | 17,671 |
| System 150 - Rectangular | 180 x 90 | 186 x 96 | 16,200 |
For a shallow space, such as ceiling voids or under floor, where high extraction rates are not needed: | |||
| System 300 - Rectangular | 308 x 29 | 314 x 35 | 8,932 |
| System 225 - Rectangular | 234 x 29 | 240 x 35 | 6,786 |
| System 100 Round/Rectangle  | System 125 Round/Rectangle  | System 150 Round/Rectangle  | System 204  | System 225  |
System 220  | System 300  | |||
Actual Dimensions (mm)  Space Requirements (mm)  | ||||
