Installation of exhaust venting
Example: Calculating the effective duct length and required internal duct diameter
Rigid pipe |
| Duct length | Duct length |
|
| ft | m |
|
|
|
|
A | Wall duct with | 12’ 5" | 3.8 m |
| louvered wall vent |
|
|
|
|
|
|
B | 90° bend | 2’ 7" | 0.8 m |
|
|
|
|
C | 20" (0.5 m) rigid pipe | 1’ 7" | 0.5 m |
|
|
|
|
D | 90° bend | 2’ 7" | 0.8 m |
|
|
|
|
E | left vent opening | 3’ 3" | 1.0 m |
|
|
|
|
Total duct |
| 22’ 5" | 6.9 m |
length |
|
|
|
|
|
|
|
The total duct length is less than 33 feet (10 m), so a duct diameter of 4" (100 mm) with adapter is sufficient.
45
