| Don't |
| Don’t use ducting longer than is necessary to
connect the fan to the grille. |
|
 |
| Do |
| Extend flexible duct fully and cut to the correct
length. Support the duct so that it is straight. Remove bends
where possible. |
|
| Don't |
| Don’t create sharp changes of direction. |
|
 |
| Do |
| Sweep changes of direction in a broad arc. |
|
| Don't |
| Don’t compress the duct when changing direction. |
|
 |
| Do |
| If changes of direction are necessary ensure
the duct diameter is maintained throughout the bend. |
|
| Don't |
| Don’t use ducting of a smaller size than the
fan spigot. |
|
 |
| Do |
| Ducting should be the same size or larger than
the fan spigot to optimise airflow. |
|
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