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Top Vent Configuration with Vertical Termination
This is considered a horizontal
elbow (it does not matter
whether it turns right or left).
It may be a 90° or 45° elbow.
40' (max)
35 feet
30 feet
25 feet
20 feet
15 feet
10 feet
5 feet
0 feet
H2
H1
Exhaust Restrictor # 6
Intake Restrictor # 2
Diffuser Position # 2
Exhaust Restrictor # 5
Intake Restrictor # 2
Diffuser Position # 2
Horizontal length is calculated by adding
both lengths of horizontal run
(Horizontal Length = H1 + H2).
This is considered a
vertical elbow
40' (max)
35 feet
30 feet
25 feet
20 feet
15 feet
10 feet
5 feet
0 feet
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