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Ducting
Additional duct lengths (4" (100 mm) rigid pipe only)
Type of bend
Flexible metal duct
– 3' 3" (1 m) straight
– 45° angle
– 90° angle
Smooth metal duct
– 3' 3" (1 m) straight
– 45° angle
– 90° angle
Elbow 90° sharp
Concertina bend
– 90° angle
Wall vent or window vent
– with louvers
– with flap
– with weather hood
20
Radius
inches
cm
10"
25
10"
25
10"
25
10"
25
8"
20
Additional duct length
ft
5' 11"
4' 11"
8' 2"
3' 3"
1' 11"
2' 7"
7' 6"
2' 4"
12' 5"
4' 11"
19' 8"
cm
180
150
250
100
60
80
230
70
380
150
600
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