Example
Rigid pipe Duct length
ft
Duct length
m
AWall duct with louvered
wall vent
12’ 5" 3.8 m
B90° bend 2’ 4" 0.7 m
C20" (0.5 m) rigid pipe 1’ 7" 0.5 m
D90° bend 2’ 4" 0.7 m
Eleft / right vent opening 3' 3" 1.0 m
Total duct
length
18’ 8" 5.7 m
The total duct length is less than 33 feet (10 m), so a duct diameter of 4" (100 mm)
with adapter is sufficient.
Installation
36