38
Exhaust
Condensate
Drain
3" Pipe
3" Pipe
W1
H1
D
Intake
Intake
Intake
Intake
Exhaust
3" Pipe
3" Pipe
Condensate
Drain
W1
D
C
Exhaust
Intake
3" Pipe
3" Pipe
3" Pipe
Condensate
Drain
W1
D
W
H1
H
12"
36"
12"
Chapter 4. – Installation
Venting the Exhaust only (Non-Direct)
● To determine the size of a common vent:
● Maximum Vent Length
Determine the total length (L) of the common vent,
which consist of the horizontal width (W/W1) and
vertical height (H/H1)
Total Length (L) = W + H + W1 + H1
Venting the Exhaust only to the side wall
Venting Intake and Exhaust to the roof
Venting the Exhaust only to the roof
<Note>
For each short radius elbow that will be used in the vent, add 8 feet (2.4 m) to the total length. For each long radius elbow
that will be used in the vent, add 5 feet (1.5m) to the total length.
Require Load
Total BTU/H
Total Length
(ft)
398,000
100 (30m)
No. of Elbows
Max. straight vent length
4
68'
3
76'
2
84'
1
92'
0
100'
Summary of Contents for Eco TOUGH NRCP111-DV-LP
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