19
CR60-IM.v0429.4
Determining the Size of the Common Vent
•
The minimum equivalent vent length is 3 ft.
•
Follow the table below for determining the maximum vent length and diameter of the common vent
installation.
•
For complete instructions on determining the appropriate sizing of the common vent installation, refer
to the Common Vent Installation Manual or contact Noritz technical support at (866) 766-7489.
Model
Configuration
No. of
Units
Table 1
: Vent Diameter (in) and Maximum Equivalent Vent
Length (ft)
PVC or CPVC Schedule 40 pipe
PP Pipe
3”
4”
6”
8”
3”
4”
6”
8”
NCC199CDV
(GQ-C3260WZ-
FF US)
Both Direct Vent
(DV) and Non-
Direct Vent (SV)
2
18*
95*
200
18*
110*
200
3
N/A
39*
155*
200
N/A
45*
155*
200
4
N/A
N/A
90*
200
N/A
N/A
90*
200
5
N/A
N/A
50*
150*
N/A
N/A
50*
150*
6
N/A
N/A
35*
130*
N/A
N/A
35*
130*
*The BTU/h input of the unit may be reduced by up to 9%.
Note
The sizing method shown in Table 1 is provided for the convenience of the installer. Maximum
acceptable vent system static pressure drop is 0.6 in. w.c.
Summary of Contents for NCC199CDV
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Page 29: ...29 CR60 IM v0429 4 2 Unit Drawing Illustration Dimensions All Units are in inches...
Page 31: ...31 CR60 IM v0429 4 3 Unit Drawing Illustration Dimensions All Units are in inches EXHAUST FLUE...
Page 33: ...33 CR60 IM v0429 4 4 Unit Drawing Illustration Dimensions All Units are in inches...
Page 35: ...35 CR60 IM v0429 4 5 Unit Drawing Illustration Dimensions All Units are in inches...
Page 37: ...37 CR60 IM v0429 4 6 Unit Drawing Illustration Dimensions All Units are in inches...
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