Non-Direct Vent Piping; Vent/Flue Pipe Lengths/Diameters/Terminations - Goodman GMSS96 Installation Instructions Manual

4. Use a knockout tool to create a 3" diameter hole
5. Install combustion air flange and secure with screws
removed in step one.
N -D V (S
ON IRECT ENT INGLE
Non-direct vent installations require only a vent/flue pipe. The
vent pipe can be run horizontally with an exit through the side of
the building or run vertically with an exit through the roof of the
building. The vent can also be run through an existing unused
chimney; however, it must extend a minimum of 12 inches above
the top of the chimney. The space between the vent pipe and the
chimney must be closed with a weather-tight, corrosion-resistant
flashing.
Although non-direct vent installations do not require a combustion
air intake pipe, a minimum of one 90° elbow should be attached to
the furnace's combustion air intake if: an upright installation uses
the standard intake location, or a horizontal installation uses the
alternate air intake location. This elbow will guard against inad-
vertent blockage of the air intake.
V /F P L
ENT LUE IPE ENGTHS AND
(For Installations At or Above 7,000 Feet using 3" Venting)
NOTE: If either a 90 degree or 45 degree elbow is used for
termination, it must be pointed downward.
Refer to the Direct and Non-Direct Vent Table for applicable length,
elbows, and pipe diameter for construction of the vent/flue pipe
system of a non-direct vent installation. In addition to the vent/
flue pipe, a single 90° elbow should be secured to the combustion
air intake to prevent inadvertent blockage. The tee used in the
vent/flue termination must be included when determining the num-
ber of elbows in the piping system.
V /F P T
ENT LUE IPE ERMINATIONS
NOTE: If either a 90 degree or 45 degree elbow is used for
termination, it must be pointed downward.
The vent/flue pipe may terminate vertically, as through a roof, or
horizontally, as through an outside wall.
Vertical vent/flue pipe terminations should be as shown in the fol-
lowing figure. Refer to Vent/Flue Pipe and Combustion Air Pipe -
Termination Locations for details concerning location restrictions.
The penetration of the vent through the roof must be sealed tight
with proper flashing such as is used with a plastic plumbing vent.
Horizontal vent/flue pipe terminations should be as shown in the
following figure. Refer to Vent/Flue Pipe and Combustion Air Pipe.
To secure the pipe passing through the wall and prohibit damage to
piping connections, a coupling should be installed on either side of
the wall and solvent cemented to a length of pipe connecting the
two couplings. The length of pipe should be the wall thickness plus
the depth of the socket fittings to be installed on the inside and
outside of the wall. The wall penetration should be sealed with silicone caulking material.
NOTE: Terminate both pipes in the same pressure zone (same side of roof, no major obstacles between pipes, etc.).
P ) P
IPE IPING
D
IAMETERS
B
E SURE NOT TO DAMAGE INTERNAL WIRING OR OTHER COMPONENTS
WHEN REINSTALLING COUPLING AND SCREWS
*MSS9* / *CSS9 Direct Vent (2-Pipe) & Non-Direct Vent (1-Pipe)
Maximum Allowable Length of Vent/FLue Pipe
PIPE
MODEL
SIZE
2 ^
*MSS920402BN
3
2
*MSS920603BN
3
2 ^
*MSS920803BN
3 ^
2 ^
*MSS920804CN
3 ^
2 ^
*MSS920805CN
3
2
*MSS921004CN
3
2
*MSS921005CN
3
2
*MSS921205DN
3
2
*CSS920402BN
3
2
*CSS920603BN
3
2
*CSS920804CN
3
2
*CSS921005CN
3
7,000 ft altitude or above use 3" pipe
^ *MSS920402BN - add 20' of 2" pipe for upflow position
^ *MSS920803BN - add 10' of 2" pipe for upflow position, add 66' of 3" pipe for upflow position
^ *MSS920804CN - add 25' of 2" pipe for upflow position, add 58' of 3" pipe for upflow position
^ *MSS920805CN - add 15' of 2" pipe for upflow position, add 58' of 3" pipe for upflow position
PIPE
MODEL
SIZE
2 ^
*MSS960402BN
3
2
*MSS960603BN
3
2 ^
*MSS960803BN
3
2
*MSS960804CN
3
2
*MSS960805CN
3
2
*MSS961005CN
3
2
*MSS961205DN
3
2
*CSS960402BN
3
2
*CSS960603BN
3
2
*CSS960804CN
3
2
*CSS961005CN
3
2
*CSS961205DN
3
7,000 ft altitude or above use 3" pipe
^ *MSS960402BN - add 25' of 2" pipe for upflow position
^ *MSS960803BN - add 20' of 2" pipe for upflow position
15
CAUTION
.
Number of Elbows
1 2 3 4 5
145 140 135 130 125
168 161 154 147 140
55 50 45 40 35
127 120 113 106 99
30 25 20 15 10
72 65 58 51 44
30 25 20 15 10
72 65 58 51 44
40 35 30 25 20
72 65 58 51 44
60 55 50 45 40
168 161 154 147 140
30 25 20 15 10
113 106 99 92 85
N/A N/A N/A N/A N/A
65 58 51 44 37
100 95 90 85 80
137 130 123 116 109
60 55 50 45 40
127 120 113 106 99
35 30 25 20 15
160 153 146 139 132
N/A N/A N/A N/A N/A
127 120 113 106 99
1 2 3 4 5
100 95 90 85 80
168 161 154 147 140
45 40 35 30 25
168 161 154 147 140
35 30 25 20 15
168 161 154 147 140
60 55 50 45 40
113 106 99 92 85
45 40 35 30 25
120 113 106 99 92
40 35 30 25 20
151 144 137 130 123
N/A N/A N/A N/A N/A
158 151 144 137 130
100 95 90 85 80
137 130 123 116 109
45 40 35 30 25
168 161 154 147 140
40 35 30 25 20
120 113 106 99 92
N/A N/A N/A N/A N/A
113 106 99 92 85
N/A N/A N/A N/A N/A
110 103 96 89 82
6 7 8
120 115 110
133 126 119
30 25 20
92 85 78
5 N/A N/A
37 30 23
5 N/A N/A
37 30 23
15 10 5
37 30 23
35 30 25
133 126 119
5 N/A N/A
78 71 64
N/A N/A N/A
30 23 16
75 70 65
102 95 88
35 30 25
92 85 78
10 5 N/A
125 118 111
N/A N/A N/A
92 85 78
6 7 8
75 70 65
133 126 119
20 15 10
133 126 119
10 5 N/A
133 126 119
35 30 25
78 71 64
20 15 10
85 78 71
15 10 5
116 109 102
N/A N/A N/A
123 116 109
75 70 65
102 95 88
20 15 10
133 126 119
15 10 5
85 78 71
N/A N/A N/A
78 71 64
N/A N/A N/A
75 68 61